diff --git a/cvat-core/jest.config.js b/cvat-core/jest.config.js
index efa327eb..c7712052 100644
--- a/cvat-core/jest.config.js
+++ b/cvat-core/jest.config.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2019 Intel Corporation
  * SPDX-License-Identifier: MIT
  */
 
diff --git a/cvat-core/jsdoc.config.js b/cvat-core/jsdoc.config.js
index c5bb836c..a51208c5 100644
--- a/cvat-core/jsdoc.config.js
+++ b/cvat-core/jsdoc.config.js
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2018 Intel Corporation
+ * Copyright (C) 2019 Intel Corporation
  * SPDX-License-Identifier: MIT
  */
 
diff --git a/cvat-core/src/annotation-format.js b/cvat-core/src/annotation-format.js
new file mode 100644
index 00000000..0bf8cfdf
--- /dev/null
+++ b/cvat-core/src/annotation-format.js
@@ -0,0 +1,235 @@
+/*
+* Copyright (C) 2019 Intel Corporation
+* SPDX-License-Identifier: MIT
+*/
+
+(() => {
+    /**
+        * Class representing an annotation loader
+        * @memberof module:API.cvat.classes
+        * @hideconstructor
+    */
+    class Loader {
+        constructor(initialData) {
+            const data = {
+                display_name: initialData.display_name,
+                format: initialData.format,
+                handler: initialData.handler,
+                version: initialData.version,
+            };
+
+            Object.defineProperties(this, {
+                name: {
+                    /**
+                        * @name name
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Loader
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.display_name,
+                },
+                format: {
+                    /**
+                        * @name format
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Loader
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.format,
+                },
+                handler: {
+                    /**
+                        * @name handler
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Loader
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.handler,
+                },
+                version: {
+                    /**
+                        * @name version
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Loader
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.version,
+                },
+            });
+        }
+    }
+
+    /**
+        * Class representing an annotation dumper
+        * @memberof module:API.cvat.classes
+        * @hideconstructor
+    */
+    class Dumper {
+        constructor(initialData) {
+            const data = {
+                display_name: initialData.display_name,
+                format: initialData.format,
+                handler: initialData.handler,
+                version: initialData.version,
+            };
+
+            Object.defineProperties(this, {
+                name: {
+                    /**
+                        * @name name
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Dumper
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.display_name,
+                },
+                format: {
+                    /**
+                        * @name format
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Dumper
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.format,
+                },
+                handler: {
+                    /**
+                        * @name handler
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Dumper
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.handler,
+                },
+                version: {
+                    /**
+                        * @name version
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.Dumper
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.version,
+                },
+            });
+        }
+    }
+
+    /**
+        * Class representing an annotation format
+        * @memberof module:API.cvat.classes
+        * @hideconstructor
+    */
+    class AnnotationFormat {
+        constructor(initialData) {
+            const data = {
+                created_date: initialData.created_date,
+                updated_date: initialData.updated_date,
+                id: initialData.id,
+                owner: initialData.owner,
+                name: initialData.name,
+                handler_file: initialData.handler_file,
+            };
+
+            data.dumpers = initialData.dumpers.map(el => new Dumper(el));
+            data.loaders = initialData.loaders.map(el => new Loader(el));
+
+            // Now all fields are readonly
+            Object.defineProperties(this, {
+                id: {
+                    /**
+                        * @name id
+                        * @type {integer}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.id,
+                },
+                owner: {
+                    /**
+                        * @name owner
+                        * @type {integer}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.owner,
+                },
+                name: {
+                    /**
+                        * @name name
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.name,
+                },
+                createdDate: {
+                    /**
+                        * @name createdDate
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.created_date,
+                },
+                updatedDate: {
+                    /**
+                        * @name updatedDate
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.updated_date,
+                },
+                handlerFile: {
+                    /**
+                        * @name handlerFile
+                        * @type {string}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => data.handler_file,
+                },
+                loaders: {
+                    /**
+                        * @name loaders
+                        * @type {module:API.cvat.classes.Loader[]}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => [...data.loaders],
+                },
+                dumpers: {
+                    /**
+                        * @name dumpers
+                        * @type {module:API.cvat.classes.Dumper[]}
+                        * @memberof module:API.cvat.classes.AnnotationFormat
+                        * @readonly
+                        * @instance
+                    */
+                    get: () => [...data.dumpers],
+                },
+            });
+        }
+    }
+
+    module.exports = {
+        AnnotationFormat,
+        Loader,
+        Dumper,
+    };
+})();
diff --git a/cvat-core/src/annotations-collection.js b/cvat-core/src/annotations-collection.js
index 7a5db6f0..5e14974b 100644
--- a/cvat-core/src/annotations-collection.js
+++ b/cvat-core/src/annotations-collection.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/annotations-objects.js b/cvat-core/src/annotations-objects.js
index d76fc4d6..d81c505f 100644
--- a/cvat-core/src/annotations-objects.js
+++ b/cvat-core/src/annotations-objects.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/annotations-saver.js b/cvat-core/src/annotations-saver.js
index 4d76f1fb..3e662f9a 100644
--- a/cvat-core/src/annotations-saver.js
+++ b/cvat-core/src/annotations-saver.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/annotations.js b/cvat-core/src/annotations.js
index 059ff006..8c9014ca 100644
--- a/cvat-core/src/annotations.js
+++ b/cvat-core/src/annotations.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
@@ -13,9 +13,14 @@
     const AnnotationsSaver = require('./annotations-saver');
     const { checkObjectType } = require('./common');
     const { Task } = require('./session');
+    const {
+        Loader,
+        Dumper,
+    } = require('./annotation-format.js');
     const {
         ScriptingError,
         DataError,
+        ArgumentError,
     } = require('./exceptions');
 
     const jobCache = new WeakMap();
@@ -190,15 +195,33 @@
         );
     }
 
-    async function uploadAnnotations(session, file, format) {
+    async function uploadAnnotations(session, file, loader) {
         const sessionType = session instanceof Task ? 'task' : 'job';
-        await serverProxy.annotations.uploadAnnotations(sessionType, session.id, file, format);
+        if (!(loader instanceof Loader)) {
+            throw new ArgumentError(
+                'A loader must be instance of Loader class',
+            );
+        }
+        await serverProxy.annotations.uploadAnnotations(sessionType, session.id, file, loader.name);
     }
 
-    async function dumpAnnotations(session, name, format) {
+    async function dumpAnnotations(session, name, dumper) {
+        if (!(dumper instanceof Dumper)) {
+            throw new ArgumentError(
+                'A dumper must be instance of Dumper class',
+            );
+        }
+
+        let result = null;
         const sessionType = session instanceof Task ? 'task' : 'job';
-        const result = await serverProxy.annotations
-            .dumpAnnotations(sessionType, session.id, name, format);
+        if (sessionType === 'job') {
+            result = await serverProxy.annotations
+                .dumpAnnotations(session.task.id, name, dumper.name);
+        } else {
+            result = await serverProxy.annotations
+                .dumpAnnotations(session.id, name, dumper.name);
+        }
+
         return result;
     }
 
diff --git a/cvat-core/src/api-implementation.js b/cvat-core/src/api-implementation.js
index fde9c25b..afb0ad02 100644
--- a/cvat-core/src/api-implementation.js
+++ b/cvat-core/src/api-implementation.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
@@ -27,6 +27,7 @@
     } = require('./enums');
 
     const User = require('./user');
+    const { AnnotationFormat } = require('./annotation-format.js');
     const { ArgumentError } = require('./exceptions');
     const { Task } = require('./session');
 
@@ -44,6 +45,11 @@
             return result;
         };
 
+        cvat.server.formats.implementation = async () => {
+            const result = await serverProxy.server.formats();
+            return result.map(el => new AnnotationFormat(el));
+        };
+
         cvat.server.login.implementation = async (username, password) => {
             await serverProxy.server.login(username, password);
         };
diff --git a/cvat-core/src/api.js b/cvat-core/src/api.js
index bf61f409..6bf52a72 100644
--- a/cvat-core/src/api.js
+++ b/cvat-core/src/api.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
@@ -101,6 +101,20 @@ function build() {
                     .apiWrapper(cvat.server.share, directory);
                 return result;
             },
+            /**
+                * Method returns available annotation formats
+                * @method formats
+                * @async
+                * @memberof module:API.cvat.server
+                * @returns {module:API.cvat.classes.AnnotationFormat[]}
+                * @throws {module:API.cvat.exceptions.PluginError}
+                * @throws {module:API.cvat.exceptions.ServerError}
+            */
+            async formats() {
+                const result = await PluginRegistry
+                    .apiWrapper(cvat.server.formats);
+                return result;
+            },
             /**
                 * Method allows to login on a server
                 * @method login
@@ -218,7 +232,7 @@ function build() {
                 * @async
                 * @memberof module:API.cvat.users
                 * @param {UserFilter} [filter={}] user filter
-                * @returns {User[]}
+                * @returns {module:API.cvat.classes.User[]}
                 * @throws {module:API.cvat.exceptions.PluginError}
                 * @throws {module:API.cvat.exceptions.ServerError}
             */
diff --git a/cvat-core/src/common.js b/cvat-core/src/common.js
index b0e6f014..51819bff 100644
--- a/cvat-core/src/common.js
+++ b/cvat-core/src/common.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/config.js b/cvat-core/src/config.js
index 30a86de3..e940a214 100644
--- a/cvat-core/src/config.js
+++ b/cvat-core/src/config.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/enums.js b/cvat-core/src/enums.js
index 948646d3..e8fbdeae 100644
--- a/cvat-core/src/enums.js
+++ b/cvat-core/src/enums.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/exceptions.js b/cvat-core/src/exceptions.js
index e80c4ce0..97788cf6 100644
--- a/cvat-core/src/exceptions.js
+++ b/cvat-core/src/exceptions.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/frames.js b/cvat-core/src/frames.js
index 67f7a8fb..06342bd0 100644
--- a/cvat-core/src/frames.js
+++ b/cvat-core/src/frames.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/labels.js b/cvat-core/src/labels.js
index de6ba99c..dc0235ff 100644
--- a/cvat-core/src/labels.js
+++ b/cvat-core/src/labels.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/logging.js b/cvat-core/src/logging.js
index 195273c2..f6b52c4e 100644
--- a/cvat-core/src/logging.js
+++ b/cvat-core/src/logging.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/object-state.js b/cvat-core/src/object-state.js
index 0f6ddb64..f1eb44ae 100644
--- a/cvat-core/src/object-state.js
+++ b/cvat-core/src/object-state.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/plugins.js b/cvat-core/src/plugins.js
index 7dc08384..595e6cbc 100644
--- a/cvat-core/src/plugins.js
+++ b/cvat-core/src/plugins.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/server-proxy.js b/cvat-core/src/server-proxy.js
index a7b18b3e..dfb8c144 100644
--- a/cvat-core/src/server-proxy.js
+++ b/cvat-core/src/server-proxy.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
@@ -90,6 +90,25 @@
                 }
             }
 
+            async function formats() {
+                const { backendAPI } = config;
+
+                let response = null;
+                try {
+                    response = await Axios.get(`${backendAPI}/server/annotation/formats`, {
+                        proxy: config.proxy,
+                    });
+                } catch (errorData) {
+                    const code = errorData.response ? errorData.response.status : errorData.code;
+                    throw new ServerError(
+                        'Could not get annotation formats from the server',
+                        code,
+                    );
+                }
+
+                return response.data;
+            }
+
             async function login(username, password) {
                 function setCookie(response) {
                     if (response.headers['set-cookie']) {
@@ -532,7 +551,7 @@
                     async function request() {
                         try {
                             const response = await Axios
-                                .post(`${backendAPI}/${session}s/${id}/annotations?upload_format=${format}`, annotationData, {
+                                .put(`${backendAPI}/${session}s/${id}/annotations?format=${format}`, annotationData, {
                                     proxy: config.proxy,
                                 });
                             if (response.status === 202) {
@@ -560,7 +579,7 @@
             async function dumpAnnotations(id, name, format) {
                 const { backendAPI } = config;
                 const filename = name.replace(/\//g, '_');
-                let url = `${backendAPI}/tasks/${id}/annotations/${filename}?dump_format=${format}`;
+                let url = `${backendAPI}/tasks/${id}/annotations/${filename}?format=${format}`;
 
                 return new Promise((resolve, reject) => {
                     async function request() {
@@ -603,6 +622,7 @@
                     value: Object.freeze({
                         about,
                         share,
+                        formats,
                         exception,
                         login,
                         logout,
diff --git a/cvat-core/src/session.js b/cvat-core/src/session.js
index 0bb3a12d..ae70c5f2 100644
--- a/cvat-core/src/session.js
+++ b/cvat-core/src/session.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
@@ -19,9 +19,9 @@
         Object.defineProperties(prototype, {
             annotations: Object.freeze({
                 value: {
-                    async upload(file, format) {
+                    async upload(file, loader) {
                         const result = await PluginRegistry
-                            .apiWrapper.call(this, prototype.annotations.upload, file, format);
+                            .apiWrapper.call(this, prototype.annotations.upload, file, loader);
                         return result;
                     },
 
@@ -37,9 +37,9 @@
                         return result;
                     },
 
-                    async dump(name, format) {
+                    async dump(name, dumper) {
                         const result = await PluginRegistry
-                            .apiWrapper.call(this, prototype.annotations.dump, name, format);
+                            .apiWrapper.call(this, prototype.annotations.dump, name, dumper);
                         return result;
                     },
 
@@ -183,7 +183,8 @@
                 * @method upload
                 * @memberof Session.annotations
                 * @param {File} annotations - a text file with annotations
-                * @param {string} format - a format of the file
+                * @param {module:API.cvat.classes.Loader} loader - a loader
+                * which will be used to upload
                 * @instance
                 * @async
                 * @throws {module:API.cvat.exceptions.PluginError}
@@ -224,10 +225,12 @@
                 * @method dump
                 * @memberof Session.annotations
                 * @param {string} name - a name of a file with annotations
-                * @param {string} format - a format of the file
+                * @param {module:API.cvat.classes.Dumper} dumper - a dumper
+                * which will be used to dump
                 * @returns {string} URL which can be used in order to get a dump file
                 * @throws {module:API.cvat.exceptions.PluginError}
                 * @throws {module:API.cvat.exceptions.ServerError}
+                * @throws {module:API.cvat.exceptions.ArgumentError}
                 * @instance
                 * @async
             */
@@ -1272,13 +1275,13 @@
         return result;
     };
 
-    Job.prototype.annotations.upload.implementation = async function (file, format) {
-        const result = await uploadAnnotations(this, file, format);
+    Job.prototype.annotations.upload.implementation = async function (file, loader) {
+        const result = await uploadAnnotations(this, file, loader);
         return result;
     };
 
-    Job.prototype.annotations.dump.implementation = async function (name, format) {
-        const result = await dumpAnnotations(this, name, format);
+    Job.prototype.annotations.dump.implementation = async function (name, dumper) {
+        const result = await dumpAnnotations(this, name, dumper);
         return result;
     };
 
@@ -1418,13 +1421,13 @@
         return result;
     };
 
-    Task.prototype.annotations.upload.implementation = async function (file, format) {
-        const result = await uploadAnnotations(this, file, format);
+    Task.prototype.annotations.upload.implementation = async function (file, loader) {
+        const result = await uploadAnnotations(this, file, loader);
         return result;
     };
 
-    Task.prototype.annotations.dump.implementation = async function (name, format) {
-        const result = await dumpAnnotations(this, name, format);
+    Task.prototype.annotations.dump.implementation = async function (name, dumper) {
+        const result = await dumpAnnotations(this, name, dumper);
         return result;
     };
 })();
diff --git a/cvat-core/src/statistics.js b/cvat-core/src/statistics.js
index 33704bc6..36910eb7 100644
--- a/cvat-core/src/statistics.js
+++ b/cvat-core/src/statistics.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/src/user.js b/cvat-core/src/user.js
index 2e6f31f1..62221c67 100644
--- a/cvat-core/src/user.js
+++ b/cvat-core/src/user.js
@@ -1,5 +1,5 @@
 /*
-* Copyright (C) 2018 Intel Corporation
+* Copyright (C) 2019 Intel Corporation
 * SPDX-License-Identifier: MIT
 */
 
diff --git a/cvat-core/tests/api/server.js b/cvat-core/tests/api/server.js
index d48e664d..6220e158 100644
--- a/cvat-core/tests/api/server.js
+++ b/cvat-core/tests/api/server.js
@@ -17,6 +17,11 @@ jest.mock('../../src/server-proxy', () => {
 
 // Initialize api
 window.cvat = require('../../src/api');
+const {
+    AnnotationFormat,
+    Loader,
+    Dumper,
+} = require('../../src/annotation-format');
 
 // Test cases
 describe('Feature: get info about cvat', () => {
@@ -49,3 +54,43 @@ describe('Feature: get share storage info', () => {
         )).rejects.toThrow(window.cvat.exceptions.ServerError);
     });
 });
+
+describe('Feature: get annotation formats', () => {
+    test('get annotation formats from a server', async () => {
+        const result = await window.cvat.server.formats();
+        expect(Array.isArray(result)).toBeTruthy();
+        for (const format of result) {
+            expect(format).toBeInstanceOf(AnnotationFormat);
+        }
+    });
+});
+
+describe('Feature: get annotation loaders', () => {
+    test('get annotation formats from a server', async () => {
+        const result = await window.cvat.server.formats();
+        expect(Array.isArray(result)).toBeTruthy();
+        for (const format of result) {
+            expect(format).toBeInstanceOf(AnnotationFormat);
+            const { loaders } = format;
+            expect(Array.isArray(loaders)).toBeTruthy();
+            for (const loader of loaders) {
+                expect(loader).toBeInstanceOf(Loader);
+            }
+        }
+    });
+});
+
+describe('Feature: get annotation dumpers', () => {
+    test('get annotation formats from a server', async () => {
+        const result = await window.cvat.server.formats();
+        expect(Array.isArray(result)).toBeTruthy();
+        for (const format of result) {
+            expect(format).toBeInstanceOf(AnnotationFormat);
+            const { dumpers } = format;
+            expect(Array.isArray(dumpers)).toBeTruthy();
+            for (const dumper of dumpers) {
+                expect(dumper).toBeInstanceOf(Dumper);
+            }
+        }
+    });
+});
\ No newline at end of file
diff --git a/cvat-core/tests/mocks/dummy-data.mock.js b/cvat-core/tests/mocks/dummy-data.mock.js
index 065b34e6..1f215d21 100644
--- a/cvat-core/tests/mocks/dummy-data.mock.js
+++ b/cvat-core/tests/mocks/dummy-data.mock.js
@@ -6,6 +6,85 @@ const aboutDummyData = {
     "version": "0.5.dev20190516142240"
 }
 
+const formatsDummyData = [{
+    "id": 1,
+    "dumpers": [
+        {
+            "display_name": "CVAT XML 1.1 for videos",
+            "format": "XML",
+            "version": "1.1",
+            "handler": "dump_as_cvat_interpolation"
+        },
+        {
+            "display_name": "CVAT XML 1.1 for images",
+            "format": "XML",
+            "version": "1.1",
+            "handler": "dump_as_cvat_annotation"
+        }
+    ],
+    "loaders": [
+        {
+            "display_name": "CVAT XML 1.1",
+            "format": "XML",
+            "version": "1.1",
+            "handler": "load"
+        }
+    ],
+    "name": "CVAT",
+    "created_date": "2019-08-08T12:18:56.571488+03:00",
+    "updated_date": "2019-08-08T12:18:56.571533+03:00",
+    "handler_file": "cvat/apps/annotation/cvat.py",
+    "owner": null
+},
+{
+    "id": 2,
+    "dumpers": [
+        {
+            "display_name": "PASCAL VOC ZIP 1.0",
+            "format": "ZIP",
+            "version": "1.0",
+            "handler": "dump"
+        }
+    ],
+    "loaders": [
+        {
+            "display_name": "PASCAL VOC ZIP 1.0",
+            "format": "ZIP",
+            "version": "1.0",
+            "handler": "load"
+        }
+    ],
+    "name": "PASCAL VOC",
+    "created_date": "2019-08-08T12:18:56.625025+03:00",
+    "updated_date": "2019-08-08T12:18:56.625071+03:00",
+    "handler_file": "cvat/apps/annotation/pascal_voc.py",
+    "owner": null
+},
+{
+    "id": 3,
+    "dumpers": [
+        {
+            "display_name": "YOLO ZIP 1.0",
+            "format": "ZIP",
+            "version": "1.0",
+            "handler": "dump"
+        }
+    ],
+    "loaders": [
+        {
+            "display_name": "YOLO ZIP 1.0",
+            "format": "ZIP",
+            "version": "1.0",
+            "handler": "load"
+        }
+    ],
+    "name": "YOLO",
+    "created_date": "2019-08-08T12:18:56.667534+03:00",
+    "updated_date": "2019-08-08T12:18:56.667578+03:00",
+    "handler_file": "cvat/apps/annotation/yolo.py",
+    "owner": null
+}];
+
 const usersDummyData = {
     "count": 2,
     "next": null,
@@ -2445,4 +2524,5 @@ module.exports = {
     taskAnnotationsDummyData,
     jobAnnotationsDummyData,
     frameMetaDummyData,
+    formatsDummyData,
 }
diff --git a/cvat-core/tests/mocks/server-proxy.mock.js b/cvat-core/tests/mocks/server-proxy.mock.js
index 56d83924..fd53b954 100644
--- a/cvat-core/tests/mocks/server-proxy.mock.js
+++ b/cvat-core/tests/mocks/server-proxy.mock.js
@@ -12,6 +12,7 @@
 const {
     tasksDummyData,
     aboutDummyData,
+    formatsDummyData,
     shareDummyData,
     usersDummyData,
     taskAnnotationsDummyData,
@@ -48,6 +49,10 @@ class ServerProxy {
             return JSON.parse(JSON.stringify(position));
         }
 
+        async function formats() {
+            return JSON.parse(JSON.stringify(formatsDummyData));
+        }
+
         async function exception() {
             return null;
         }
@@ -239,6 +244,7 @@ class ServerProxy {
                 value: Object.freeze({
                     about,
                     share,
+                    formats,
                     exception,
                     login,
                     logout,
diff --git a/cvat/apps/dashboard/static/dashboard/js/dashboard.js b/cvat/apps/dashboard/static/dashboard/js/dashboard.js
index bd504ff1..58c5a552 100644
--- a/cvat/apps/dashboard/static/dashboard/js/dashboard.js
+++ b/cvat/apps/dashboard/static/dashboard/js/dashboard.js
@@ -6,8 +6,6 @@
 
 /* global
     userConfirm:false
-    dumpAnnotationRequest:false
-    uploadTaskAnnotationRequest:false
     LabelsInfo:false
     showMessage:false
     showOverlay:false
@@ -85,10 +83,8 @@ class TaskView {
             if (file) {
                 button.text('Uploading..');
                 button.prop('disabled', true);
-                const annotationData = new FormData();
-                annotationData.append('annotation_file', file);
                 try {
-                    await uploadTaskAnnotationRequest(this._task.id, annotationData, format);
+                    await this._task.annotations.upload(file, format);
                 } catch (error) {
                     showMessage(error.message);
                 } finally {
@@ -102,7 +98,12 @@ class TaskView {
     async _dump(button, format) {
         button.disabled = true;
         try {
-            await dumpAnnotationRequest(this._task.id, this._task.name, format);
+            const url = await this._task.annotations.dump(this._task.name, format);
+            const a = document.createElement('a');
+            a.href = `${url}`;
+            document.body.appendChild(a);
+            a.click();
+            a.remove();
         } catch (error) {
             showMessage(error.message);
         } finally {
@@ -139,22 +140,22 @@ class TaskView {
 
         for (const format of this._annotationFormats) {
             for (const dumper of format.dumpers) {
-                const listItem = $(`<li>${dumper.display_name}</li>`).on('click', () => {
+                const listItem = $(`<li>${dumper.name}</li>`).on('click', () => {
                     dropdownDownloadMenu.addClass('hidden');
-                    this._dump(downloadButton[0], dumper.display_name);
+                    this._dump(downloadButton[0], dumper);
                 });
 
-                if (isDefaultFormat(dumper.display_name, this._task.mode)) {
+                if (isDefaultFormat(dumper.name, this._task.mode)) {
                     listItem.addClass('bold');
                 }
                 dropdownDownloadMenu.append(listItem);
             }
 
             for (const loader of format.loaders) {
-                dropdownUploadMenu.append($(`<li>${loader.display_name}</li>`).on('click', () => {
+                dropdownUploadMenu.append($(`<li>${loader.name}</li>`).on('click', () => {
                     dropdownUploadMenu.addClass('hidden');
                     userConfirm('The current annotation will be lost. Are you sure?', () => {
-                        this._upload(uploadButton, loader.display_name);
+                        this._upload(uploadButton, loader);
                     });
                 }));
             }
@@ -728,10 +729,10 @@ window.addEventListener('DOMContentLoaded', () => {
         // TODO: Use REST API in order to get meta
         $.get('/dashboard/meta'),
         $.get(`/api/v1/tasks${window.location.search}`),
-        $.get('/api/v1/server/annotation/formats'),
+        window.cvat.server.formats(),
     ).then((metaData, taskData, annotationFormats) => {
         try {
-            new DashboardView(metaData[0], taskData[0], annotationFormats[0]);
+            new DashboardView(metaData[0], taskData[0], annotationFormats);
         } catch (exception) {
             $('#content').empty();
             const message = `Can not build CVAT dashboard. Exception: ${exception}.`;
diff --git a/cvat/apps/engine/static/engine/js/cvat.js b/cvat/apps/engine/static/engine/js/cvat.js
index 768307bb..6e63df36 100644
--- a/cvat/apps/engine/static/engine/js/cvat.js
+++ b/cvat/apps/engine/static/engine/js/cvat.js
@@ -1,22 +1,22 @@
-window.cvat=function(t){var e={};function n(r){if(e[r])return e[r].exports;var o=e[r]={i:r,l:!1,exports:{}};return t[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}return n.m=t,n.c=e,n.d=function(t,e,r){n.o(t,e)||Object.defineProperty(t,e,{enumerable:!0,get:r})},n.r=function(t){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(t,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(t,"__esModule",{value:!0})},n.t=function(t,e){if(1&e&&(t=n(t)),8&e)return t;if(4&e&&"object"==typeof t&&t&&t.__esModule)return t;var r=Object.create(null);if(n.r(r),Object.defineProperty(r,"default",{enumerable:!0,value:t}),2&e&&"string"!=typeof t)for(var o in t)n.d(r,o,function(e){return t[e]}.bind(null,o));return r},n.n=function(t){var e=t&&t.__esModule?function(){return t.default}:function(){return t};return n.d(e,"a",e),e},n.o=function(t,e){return Object.prototype.hasOwnProperty.call(t,e)},n.p="",n(n.s=88)}([function(t,e,n){(function(e){var n="object",r=function(t){return 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Call annotations.get() or annotations.clear(true) before")},uploadAnnotations:async function(t,n,r){const o=t instanceof i?"task":"job";await e.annotations.uploadAnnotations(o,t.id,n,r)},dumpAnnotations:async function(t,n,r){const o=t instanceof i?"task":"job";return await e.annotations.dumpAnnotations(o,t.id,n,r)}}})()},function(t,e,n){n(4),n(87),n(8),n(51),(()=>{const{RectangleShape:e,PolygonShape:r,PolylineShape:o,PointsShape:s,RectangleTrack:i,PolygonTrack:a,PolylineTrack:c,PointsTrack:u,Track:l,Shape:p,Tag:f,objectStateFactory:h}=n(154),{checkObjectType:d}=n(37),b=n(83),{Label:g}=n(36),{DataError:m,ArgumentError:y,ScriptingError:v}=n(5),{ObjectShape:w,ObjectType:O}=n(19),x=n(50),j=["#0066FF","#AF593E","#01A368","#FF861F","#ED0A3F","#FF3F34","#76D7EA","#8359A3","#FBE870","#C5E17A","#03BB85","#FFDF00","#8B8680","#0A6B0D","#8FD8D8","#A36F40","#F653A6","#CA3435","#FFCBA4","#FF99CC","#FA9D5A","#FFAE42","#A78B00","#788193","#514E49","#1164B4","#F4FA9F","#FED8B1","#C32148","#01796F","#E90067","#FF91A4","#404E5A","#6CDAE7","#FFC1CC","#006A93","#867200","#E2B631","#6EEB6E","#FFC800","#CC99BA","#FF007C","#BC6CAC","#DCCCD7","#EBE1C2","#A6AAAE","#B99685","#0086A7","#5E4330","#C8A2C8","#708EB3","#BC8777","#B2592D","#497E48","#6A2963","#E6335F","#00755E","#B5A895","#0048ba","#EED9C4","#C88A65","#FF6E4A","#87421F","#B2BEB5","#926F5B","#00B9FB","#6456B7","#DB5079","#C62D42","#FA9C44","#DA8A67","#FD7C6E","#93CCEA","#FCF686","#503E32","#FF5470","#9DE093","#FF7A00","#4F69C6","#A50B5E","#F0E68C","#FDFF00","#F091A9","#FFFF66","#6F9940","#FC74FD","#652DC1","#D6AEDD","#EE34D2","#BB3385","#6B3FA0","#33CC99","#FFDB00","#87FF2A","#6EEB6E","#FFC800","#CC99BA","#7A89B8","#006A93","#867200","#E2B631","#D9D6CF"];function k(t,n,i){const{type:a}=t,c=j[n%j.length];let u=null;switch(a){case"rectangle":u=new e(t,n,c,i);break;case"polygon":u=new r(t,n,c,i);break;case"polyline":u=new o(t,n,c,i);break;case"points":u=new s(t,n,c,i);break;default:throw new m(`An unexpected type of shape "${a}"`)}return u}function S(t,e,n){if(t.shapes.length){const{type:r}=t.shapes[0],o=j[e%j.length];let s=null;switch(r){case"rectangle":s=new i(t,e,o,n);break;case"polygon":s=new a(t,e,o,n);break;case"polyline":s=new c(t,e,o,n);break;case"points":s=new u(t,e,o,n);break;default:throw new m(`An unexpected type of track "${r}"`)}return s}return console.warn("The track without any shapes had been found. It was ignored."),null}t.exports=class{constructor(t){this.startFrame=t.startFrame,this.stopFrame=t.stopFrame,this.frameMeta=t.frameMeta,this.labels=t.labels.reduce((t,e)=>(t[e.id]=e,t),{}),this.shapes={},this.tags={},this.tracks=[],this.objects={},this.count=0,this.flush=!1,this.collectionZ={},this.groups={max:0},this.injection={labels:this.labels,collectionZ:this.collectionZ,groups:this.groups,frameMeta:this.frameMeta}}import(t){for(const e of t.tags){const t=++this.count,n=new f(e,t,this.injection);this.tags[n.frame]=this.tags[n.frame]||[],this.tags[n.frame].push(n),this.objects[t]=n}for(const e of t.shapes){const t=++this.count,n=k(e,t,this.injection);this.shapes[n.frame]=this.shapes[n.frame]||[],this.shapes[n.frame].push(n),this.objects[t]=n}for(const e of t.tracks){const t=++this.count,n=S(e,t,this.injection);n&&(this.tracks.push(n),this.objects[t]=n)}return this}export(){return{tracks:this.tracks.filter(t=>!t.removed).map(t=>t.toJSON()),shapes:Object.values(this.shapes).reduce((t,e)=>(t.push(...e),t),[]).filter(t=>!t.removed).map(t=>t.toJSON()),tags:Object.values(this.tags).reduce((t,e)=>(t.push(...e),t),[]).filter(t=>!t.removed).map(t=>t.toJSON())}}get(t){const{tracks:e}=this,n=this.shapes[t]||[],r=this.tags[t]||[],o=e.concat(n).concat(r).filter(t=>!t.removed),s=[];for(const e of o){const n=e.get(t);if(n.outside&&!n.keyframe)continue;const r=h.call(e,t,n);s.push(r)}return s}merge(t){if(d("shapes for merge",t,null,Array),!t.length)return;const e=t.map(t=>{d("object state",t,null,x);const e=this.objects[t.clientID];if(void 0===e)throw new y("The object has not been saved yet. Call ObjectState.put([state]) before you can merge it");return e}),n={},{label:r,shapeType:o}=t[0];if(!(r.id in this.labels))throw new y(`Unknown label for the task: ${r.id}`);if(!Object.values(w).includes(o))throw new y(`Got unknown shapeType "${o}"`);const s=r.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(let i=0;i<e.length;i++){const a=e[i],c=t[i];if(c.label.id!==r.id)throw new y(`All shape labels are expected to be ${r.name}, but got ${c.label.name}`);if(c.shapeType!==o)throw new y(`All shapes are expected to be ${o}, but got ${c.shapeType}`);if(a instanceof p){if(a.frame in n&&!n[a.frame].outside)throw new y("Expected only one visible shape per frame");n[a.frame]={type:o,frame:a.frame,points:[...a.points],occluded:a.occluded,zOrder:a.zOrder,outside:!1,attributes:Object.keys(a.attributes).reduce((t,e)=>(e in s&&s[e].mutable&&t.push({spec_id:+e,value:a.attributes[e]}),t),[])},a.frame+1 in n||(n[a.frame+1]=JSON.parse(JSON.stringify(n[a.frame])),n[a.frame+1].outside=!0,n[a.frame+1].frame++)}else{if(!(a instanceof l))throw new y(`Trying to merge unknown object type: ${a.constructor.name}. `+"Only shapes and tracks are expected.");{const t={};for(const e of Object.keys(a.shapes)){const r=a.shapes[e];if(e in n&&!n[e].outside){if(r.outside)continue;throw new y("Expected only one visible shape per frame")}let s=!1;for(const e in r.attributes)e in t&&t[e]===r.attributes[e]||(s=!0,t[e]=r.attributes[e]);n[e]={type:o,frame:+e,points:[...r.points],occluded:r.occluded,outside:r.outside,zOrder:r.zOrder,attributes:s?Object.keys(t).reduce((e,n)=>(e.push({spec_id:+n,value:t[n]}),e),[]):[]}}}}}let i=!1;for(const t of Object.keys(n).sort((t,e)=>+t-+e)){if((i=i||n[t].outside)||!n[t].outside)break;delete n[t]}const a=++this.count,c=S({frame:Math.min.apply(null,Object.keys(n).map(t=>+t)),shapes:Object.values(n),group:0,label_id:r.id,attributes:Object.keys(t[0].attributes).reduce((e,n)=>(s[n].mutable||e.push({spec_id:+n,value:t[0].attributes[n]}),e),[])},a,this.injection);this.tracks.push(c),this.objects[a]=c;for(const t of e)t.removed=!0,"function"==typeof t.resetCache&&t.resetCache()}split(t,e){d("object state",t,null,x),d("frame",e,"integer",null);const n=this.objects[t.clientID];if(void 0===n)throw new y("The object has not been saved yet. Call annotations.put([state]) before");if(t.objectType!==O.TRACK)return;const r=Object.keys(n.shapes).sort((t,e)=>+t-+e);if(e<=+r[0]||e>r[r.length-1])return;const o=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{}),s=n.toJSON(),i={type:t.shapeType,points:[...t.points],occluded:t.occluded,outside:t.outside,zOrder:0,attributes:Object.keys(t.attributes).reduce((e,n)=>(o[n].mutable||e.push({spec_id:+n,value:t.attributes[n]}),e),[]),frame:e},a={frame:s.frame,group:0,label_id:s.label_id,attributes:s.attributes,shapes:[]},c=JSON.parse(JSON.stringify(a));c.frame=e,c.shapes.push(JSON.parse(JSON.stringify(i))),s.shapes.map(t=>(delete t.id,t.frame<e?a.shapes.push(JSON.parse(JSON.stringify(t))):t.frame>e&&c.shapes.push(JSON.parse(JSON.stringify(t))),t)),a.shapes.push(i),a.shapes[a.shapes.length-1].outside=!0;let u=++this.count;const l=S(a,u,this.injection);this.tracks.push(l),this.objects[u]=l,u=++this.count;const p=S(c,u,this.injection);this.tracks.push(p),this.objects[u]=p,n.removed=!0,n.resetCache()}group(t,e){d("shapes for group",t,null,Array);const n=t.map(t=>{d("object state",t,null,x);const e=this.objects[t.clientID];if(void 0===e)throw new y("The object has not been saved yet. Call annotations.put([state]) before");return e}),r=e?0:++this.groups.max;for(const t of n)t.group=r,"function"==typeof t.resetCache&&t.resetCache();return r}clear(){this.shapes={},this.tags={},this.tracks=[],this.objects={},this.count=0,this.flush=!0}statistics(){const t={},e={rectangle:{shape:0,track:0},polygon:{shape:0,track:0},polyline:{shape:0,track:0},points:{shape:0,track:0},tags:0,manually:0,interpolated:0,total:0},n=JSON.parse(JSON.stringify(e));for(const n of Object.values(this.labels)){const{name:r}=n;t[r]=JSON.parse(JSON.stringify(e))}for(const e of Object.values(this.objects)){let n=null;if(e instanceof p)n="shape";else if(e instanceof l)n="track";else{if(!(e instanceof f))throw new v(`Unexpected object type: "${n}"`);n="tag"}const r=e.label.name;if("tag"===n)t[r].tags++,t[r].manually++,t[r].total++;else{const{shapeType:o}=e;if(t[r][o][n]++,"track"===n){const n=Object.keys(e.shapes).sort((t,e)=>+t-+e).map(t=>+t);let o=n[0],s=!1;for(const i of n){if(s){const e=i-o-1;t[r].interpolated+=e,t[r].total+=e}s=!e.shapes[i].outside,o=i,s&&(t[r].manually++,t[r].total++)}const i=n[n.length-1];if(i!==this.stopFrame&&!e.shapes[i].outside){const e=this.stopFrame-i;t[r].interpolated+=e,t[r].total+=e}}else t[r].manually++,t[r].total++}}for(const e of Object.keys(t))for(const r of Object.keys(t[e]))if("object"==typeof t[e][r])for(const o of Object.keys(t[e][r]))n[r][o]+=t[e][r][o];else n[r]+=t[e][r];return new b(t,n)}put(t){d("shapes for put",t,null,Array);const e={shapes:[],tracks:[],tags:[]};function n(t,e){const n=+e,r=this.attributes[e];return d("attribute id",n,"integer",null),d("attribute value",r,"string",null),t.push({spec_id:n,value:r}),t}for(const r of t){d("object state",r,null,x),d("state client ID",r.clientID,"undefined",null),d("state frame",r.frame,"integer",null),d("state attributes",r.attributes,null,Object),d("state label",r.label,null,g);const t=Object.keys(r.attributes).reduce(n.bind(r),[]),o=r.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});if("tag"===r.objectType)e.tags.push({attributes:t,frame:r.frame,label_id:r.label.id,group:0});else{d("state occluded",r.occluded,"boolean",null),d("state points",r.points,null,Array);for(const t of r.points)d("point coordinate",t,"number",null);if(!Object.values(w).includes(r.shapeType))throw new y("Object shape must be one of: "+`${JSON.stringify(Object.values(w))}`);if("shape"===r.objectType)e.shapes.push({attributes:t,frame:r.frame,group:0,label_id:r.label.id,occluded:r.occluded||!1,points:[...r.points],type:r.shapeType,z_order:0});else{if("track"!==r.objectType)throw new y("Object type must be one of: "+`${JSON.stringify(Object.values(O))}`);e.tracks.push({attributes:t.filter(t=>!o[t.spec_id].mutable),frame:r.frame,group:0,label_id:r.label.id,shapes:[{attributes:t.filter(t=>o[t.spec_id].mutable),frame:r.frame,occluded:r.occluded||!1,outside:!1,points:[...r.points],type:r.shapeType,z_order:0}]})}}}this.import(e)}select(t,e,n){d("shapes for select",t,null,Array),d("x coordinate",e,"number",null),d("y coordinate",n,"number",null);let r=null,o=null;for(const s of t){if(d("object state",s,null,x),s.outside)continue;const t=this.objects[s.clientID];if(void 0===t)throw new y("The object has not been saved yet. Call annotations.put([state]) before");const i=t.constructor.distance(s.points,e,n);null!==i&&(null===r||i<r)&&(r=i,o=s)}return{state:o,distance:r}}}})()},function(t,e,n){"use strict";var r=n(2);t.exports=function(t,e){var n=[][t];return!n||!r(function(){n.call(null,e||function(){throw 1},1)})}},function(t,e,n){n(4),n(87),n(8),(()=>{const e=n(50),{checkObjectType:r}=n(37),{ObjectShape:o,ObjectType:s,AttributeType:i}=n(19),{DataError:a,ArgumentError:c,ScriptingError:u}=n(5),{Label:l}=n(36);function p(t,n){const r=new e(n);return r.hidden={save:this.save.bind(this,t,r),delete:this.delete.bind(this),up:this.up.bind(this,t,r),down:this.down.bind(this,t,r)},r}function f(t,e){if(t===o.RECTANGLE){if(e.length/2!=2)throw new a(`Rectangle must have 2 points, but got ${e.length/2}`)}else if(t===o.POLYGON){if(e.length/2<3)throw new a(`Polygon must have at least 3 points, but got ${e.length/2}`)}else if(t===o.POLYLINE){if(e.length/2<2)throw new a(`Polyline must have at least 2 points, but got ${e.length/2}`)}else{if(t!==o.POINTS)throw new c(`Unknown value of shapeType has been recieved ${t}`);if(e.length/2<1)throw new a(`Points must have at least 1 points, but got ${e.length/2}`)}}function h(t,e){if(t===o.POINTS)return!0;let n=Number.MAX_SAFE_INTEGER,r=Number.MIN_SAFE_INTEGER,s=Number.MAX_SAFE_INTEGER,i=Number.MIN_SAFE_INTEGER;for(let t=0;t<e.length-1;t+=2)n=Math.min(n,e[t]),r=Math.max(r,e[t]),s=Math.min(s,e[t+1]),i=Math.max(i,e[t+1]);if(t===o.POLYLINE){return Math.max(r-n,i-s)>=3}return(r-n)*(i-s)>=9}function d(t,e){const{values:n}=e,r=e.inputType;if("string"!=typeof t)throw new c(`Attribute value is expected to be string, but got ${typeof t}`);return r===i.NUMBER?+t>=+n[0]&&+t<=+n[1]&&!((+t-+n[0])%+n[2]):r===i.CHECKBOX?["true","false"].includes(t.toLowerCase()):n.includes(t)}class b{constructor(t,e,n){this.taskLabels=n.labels,this.clientID=e,this.serverID=t.id,this.group=t.group,this.label=this.taskLabels[t.label_id],this.frame=t.frame,this.removed=!1,this.lock=!1,this.attributes=t.attributes.reduce((t,e)=>(t[e.spec_id]=e.value,t),{}),this.appendDefaultAttributes(this.label),n.groups.max=Math.max(n.groups.max,this.group)}appendDefaultAttributes(t){const e=t.attributes;for(const t of e)t.id in this.attributes||(this.attributes[t.id]=t.defaultValue)}delete(t){return this.lock&&!t||(this.removed=!0),!0}}class g extends b{constructor(t,e,n,r){super(t,e,r),this.frameMeta=r.frameMeta,this.collectionZ=r.collectionZ,this.color=n,this.shapeType=null}_getZ(t){return this.collectionZ[t]=this.collectionZ[t]||{max:0,min:0},this.collectionZ[t]}save(){throw new u("Is not implemented")}get(){throw new u("Is not implemented")}toJSON(){throw new u("Is not implemented")}up(t,e){const n=this._getZ(t);n.max++,e.zOrder=n.max}down(t,e){const n=this._getZ(t);n.min--,e.zOrder=n.min}}class m extends g{constructor(t,e,n,r){super(t,e,n,r),this.points=t.points,this.occluded=t.occluded,this.zOrder=t.z_order;const o=this._getZ(this.frame);o.max=Math.max(o.max,this.zOrder||0),o.min=Math.min(o.min,this.zOrder||0)}toJSON(){return{type:this.shapeType,clientID:this.clientID,occluded:this.occluded,z_order:this.zOrder,points:[...this.points],attributes:Object.keys(this.attributes).reduce((t,e)=>(t.push({spec_id:e,value:this.attributes[e]}),t),[]),id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group}}get(t){if(t!==this.frame)throw new u("Got frame is not equal to the frame of the shape");return{objectType:s.SHAPE,shapeType:this.shapeType,clientID:this.clientID,serverID:this.serverID,occluded:this.occluded,lock:this.lock,zOrder:this.zOrder,points:[...this.points],attributes:Object.assign({},this.attributes),label:this.label,group:this.group,color:this.color}}save(t,e){if(t!==this.frame)throw new u("Got frame is not equal to the frame of the shape");if(this.lock&&e.lock)return p.call(this,t,this.get(t));const n=this.get(t),o=e.updateFlags;if(o.label&&(r("label",e.label,null,l),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label)),o.attributes){const t=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(const r of Object.keys(e.attributes)){const o=e.attributes[r];if(!(r in t&&d(o,t[r])))throw new c(`Trying to save unknown attribute with id ${r} and value ${o}`);n.attributes[r]=o}}if(o.points){r("points",e.points,null,Array),f(this.shapeType,e.points);const{width:o,height:s}=this.frameMeta[t],i=[];for(let t=0;t<e.points.length-1;t+=2){const n=e.points[t],a=e.points[t+1];r("coordinate",n,"number",null),r("coordinate",a,"number",null),i.push(Math.clamp(n,0,o),Math.clamp(a,0,s))}h(this.shapeType,i)&&(n.points=i)}if(o.occluded&&(r("occluded",e.occluded,"boolean",null),n.occluded=e.occluded),o.group&&(r("group",e.group,"integer",null),n.group=e.group),o.zOrder&&(r("zOrder",e.zOrder,"integer",null),n.zOrder=e.zOrder),o.lock&&(r("lock",e.lock,"boolean",null),n.lock=e.lock),o.color){if(r("color",e.color,"string",null),/^#[0-9A-F]{6}$/i.test(e.color))throw new c(`Got invalid color value: "${e.color}"`);n.color=e.color}o.reset();for(const t of Object.keys(n))t in this&&(this[t]=n[t]);return p.call(this,t,this.get(t))}}class y extends g{constructor(t,e,n,r){super(t,e,n,r),this.shapes=t.shapes.reduce((t,e)=>{t[e.frame]={serverID:e.id,occluded:e.occluded,zOrder:e.z_order,points:e.points,outside:e.outside,attributes:e.attributes.reduce((t,e)=>(t[e.spec_id]=e.value,t),{})};const n=this._getZ(e.frame);return n.max=Math.max(n.max,e.z_order),n.min=Math.min(n.min,e.z_order),t},{}),this.cache={}}toJSON(){const t=this.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});return{clientID:this.clientID,id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group,attributes:Object.keys(this.attributes).reduce((e,n)=>(t[n].mutable||e.push({spec_id:n,value:this.attributes[n]}),e),[]),shapes:Object.keys(this.shapes).reduce((e,n)=>(e.push({type:this.shapeType,occluded:this.shapes[n].occluded,z_order:this.shapes[n].zOrder,points:[...this.shapes[n].points],outside:this.shapes[n].outside,attributes:Object.keys(this.shapes[n].attributes).reduce((e,r)=>(t[r].mutable&&e.push({spec_id:r,value:this.shapes[n].attributes[r]}),e),[]),id:this.shapes[n].serverID,frame:+n}),e),[])}}get(t){if(!(t in this.cache)){const e=Object.assign({},this.getPosition(t),{attributes:this.getAttributes(t),group:this.group,objectType:s.TRACK,shapeType:this.shapeType,clientID:this.clientID,serverID:this.serverID,lock:this.lock,color:this.color});this.cache[t]=e}const e=JSON.parse(JSON.stringify(this.cache[t]));return e.label=this.label,e}neighborsFrames(t){const e=Object.keys(this.shapes).map(t=>+t);let n=Number.MAX_SAFE_INTEGER,r=Number.MAX_SAFE_INTEGER;for(const o of e){const e=Math.abs(t-o);o<=t&&e<n?n=e:e<r&&(r=e)}return{leftFrame:n===Number.MAX_SAFE_INTEGER?null:t-n,rightFrame:r===Number.MAX_SAFE_INTEGER?null:t+r}}getAttributes(t){const e={};for(const t in this.attributes)Object.prototype.hasOwnProperty.call(this.attributes,t)&&(e[t]=this.attributes[t]);const n=Object.keys(this.shapes).sort((t,e)=>+t-+e);for(const r of n)if(r<=t){const{attributes:t}=this.shapes[r];for(const n in t)Object.prototype.hasOwnProperty.call(t,n)&&(e[n]=t[n])}return e}save(t,e){if(this.lock&&e.lock)return p.call(this,t,this.get(t));const n=Object.assign(this.get(t));n.attributes=Object.assign(n.attributes),n.points=[...n.points];const o=e.updateFlags;let s=!1;o.label&&(r("label",e.label,null,l),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label));const i=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});if(o.attributes)for(const t of Object.keys(e.attributes)){const r=e.attributes[t];if(!(t in i&&d(r,i[t])))throw new c(`Trying to save unknown attribute with id ${t} and value ${r}`);n.attributes[t]=r}if(o.points){r("points",e.points,null,Array),f(this.shapeType,e.points);const{width:o,height:i}=this.frameMeta[t],a=[];for(let t=0;t<e.points.length-1;t+=2){const 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Object.values(this.shapes))t.attributes={};if(o.keyframe&&!e.keyframe){for(const e in this.cache)+e>t&&delete this.cache[e];return this.cache[t].keyframe=!1,delete this.shapes[t],o.reset(),p.call(this,t,this.get(t))}if(s||o.keyframe&&e.keyframe){for(const e in this.cache)+e>t&&delete this.cache[e];if(this.cache[t].keyframe=!0,e.keyframe=!0,this.shapes[t]={frame:t,zOrder:n.zOrder,points:n.points,outside:n.outside,occluded:n.occluded,attributes:{}},o.attributes)for(const r of Object.keys(n.attributes))i[r].mutable&&(this.shapes[t].attributes[r]=e.attributes[r],this.shapes[t].attributes[r]=e.attributes[r])}return o.reset(),p.call(this,t,this.get(t))}getPosition(t){const{leftFrame:e,rightFrame:n}=this.neighborsFrames(t),r=Number.isInteger(n)?this.shapes[n]:null,o=Number.isInteger(e)?this.shapes[e]:null;if(o&&e===t)return{points:[...o.points],occluded:o.occluded,outside:o.outside,zOrder:o.zOrder,keyframe:!0};if(r&&o)return Object.assign({},this.interpolatePosition(o,r,t),{keyframe:!1});if(r)return{points:[...r.points],occluded:r.occluded,outside:!0,zOrder:0,keyframe:!1};if(o)return{points:[...o.points],occluded:o.occluded,outside:o.outside,zOrder:0,keyframe:!1};throw new u(`No one neightbour frame found for the track with client ID: "${this.id}"`)}delete(t){return this.lock&&!t||(this.removed=!0,this.resetCache()),!0}resetCache(){this.cache={}}}class v extends m{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.RECTANGLE,f(this.shapeType,this.points)}static distance(t,e,n){const[r,o,s,i]=t;return e>=r&&e<=s&&n>=o&&n<=i?Math.min.apply(null,[e-r,n-o,s-e,i-n]):null}}class w extends m{constructor(t,e,n,r){super(t,e,n,r)}}class O extends w{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.POLYGON,f(this.shapeType,this.points)}static distance(t,e,n){function r(t,r,o,s){return(o-t)*(n-r)-(e-t)*(s-r)}let o=0;const s=[];for(let i=0,a=t.length-2;i<t.length-1;a=i,i+=2){const c=t[a],u=t[a+1],l=t[i],p=t[i+1];u<=n?p>n&&r(c,u,l,p)>0&&o++:p<=n&&r(c,u,l,p)<0&&o--;const f=e-(u-p),h=n-(l-c);(f-c)*(l-f)>=0&&(h-u)*(p-h)>=0?s.push(Math.sqrt(Math.pow(e-f,2)+Math.pow(n-h,2))):s.push(Math.min(Math.sqrt(Math.pow(c-e,2)+Math.pow(u-n,2)),Math.sqrt(Math.pow(l-e,2)+Math.pow(p-n,2))))}return 0!==o?Math.min.apply(null,s):null}}class x extends w{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.POLYLINE,f(this.shapeType,this.points)}static distance(t,e,n){const r=[];for(let o=0;o<t.length-2;o+=2){const s=t[o],i=t[o+1],a=t[o+2],c=t[o+3];(e-s)*(a-e)>=0&&(n-i)*(c-n)>=0?r.push(Math.abs((c-i)*e-(a-s)*n+a*i-c*s)/Math.sqrt(Math.pow(c-i,2)+Math.pow(a-s,2))):r.push(Math.min(Math.sqrt(Math.pow(s-e,2)+Math.pow(i-n,2)),Math.sqrt(Math.pow(a-e,2)+Math.pow(c-n,2))))}return Math.min.apply(null,r)}}class j extends w{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.POINTS,f(this.shapeType,this.points)}static distance(t,e,n){const r=[];for(let o=0;o<t.length;o+=2){const s=t[o],i=t[o+1];r.push(Math.sqrt(Math.pow(s-e,2)+Math.pow(i-n,2)))}return Math.min.apply(null,r)}}class k extends y{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.RECTANGLE;for(const t of Object.values(this.shapes))f(this.shapeType,t.points)}interpolatePosition(t,e,n){const r=(n-t.frame)/(e.frame-t.frame),o=[e.points[0]-t.points[0],e.points[1]-t.points[1],e.points[2]-t.points[2],e.points[3]-t.points[3]];return{points:[t.points[0]+o[0]*r,t.points[1]+o[1]*r,t.points[2]+o[2]*r,t.points[3]+o[3]*r],occluded:t.occluded,outside:t.outside,zOrder:t.zOrder}}}class S extends y{constructor(t,e,n,r){super(t,e,n,r)}interpolatePosition(t,e,n){function r(t){let e=Number.MAX_SAFE_INTEGER,n=Number.MAX_SAFE_INTEGER,r=Number.MIN_SAFE_INTEGER,o=Number.MIN_SAFE_INTEGER;for(let s=0;s<t.length;s+=2)t[s]<e&&(e=t[s]),t[s+1]<n&&(n=t[s+1]),t[s]>r&&(r=t[s]),t[s+1]>o&&(o=t[s+1]);return{xmin:e,ymin:n,xmax:r,ymax:o}}function o(t,e){const n=[],r=e.xmax-e.xmin,o=e.ymax-e.ymin;for(let s=0;s<t.length;s+=2)n.push((t[s]-e.xmin)/r,(t[s+1]-e.ymin)/o);return n}function s(t,e){const n=[],r=e.xmax-e.xmin,o=e.ymax-e.ymin;for(let s=0;s<t.length;s+=2)n.push(t[s]*r+e.xmin,t[s+1]*o+e.ymin);return n}function i(t){const e=[];for(let n=0;n<t.length;n+=2)e.push({x:t[n],y:t[n+1]});return e}function a(t){const e=[];for(const n of t)e.push(n.x,n.y);return e}function c(t,e){function n(t){let e=0;for(let n=1;n<t.length;n+=2){e+=Math.sqrt(Math.pow(t[n].x-t[n-1].x,2)+Math.pow(t[n].y-t[n-1].y,2))}return e||Number.MAX_SAFE_INTEGER}function r(t,e){let n=0;for(let r=1;r<t.length;r+=2){const o=Math.sqrt(Math.pow(t[r].x-t[r-1].x,2)+Math.pow(t[r].y-t[r-1].y,2));n+=Math.pow(o-e,2)}return n}const o=[],s=[],i=function(t,e){const n={};for(let r=0;r<t.length;r++){n[r]=n[r]||{};for(let o=0;o<e.length;o++){const s=t[r].x-e[o].x,i=t[r].y-e[o].y;n[r][o]=Math.sqrt(Math.pow(s,2)+Math.pow(i,2))}}return n}(t,e),a=function(t,e,n){const r={};for(const o of t)r[o]=e.concat().sort((t,e)=>n[o][t]-n[o][e]);const o={},s={};let i=0;for(;Object.values(s).length!==t.length;){for(const e of t){if(s[e])continue;const t=r[e][i],a=n[e][t];if(t in o&&o[t].distance>a){const e=o[t].value;delete o[t],delete s[e]}t in o||(o[t]={value:e,distance:a},s[e]=!0)}i++}const a={};for(const t of Object.keys(o))a[o[t].value]={value:t,distance:o[t].distance};return a}(Array.from(t.keys()),Array.from(e.keys()),i),c=(n(e)+n(t))/(e.length+t.length);!function(t,e){for(const n of Object.keys(t))t[n].distance>e&&delete t[n]}(a,c+3*Math.sqrt((r(t,c)+r(e,c))/(t.length+e.length)));for(const t of Object.keys(a))a[t]=a[t].value;const u=this.appendMapping(a,t,e);for(const n of u)o.push(t[n]),s.push(e[a[n]]);return[o,s]}let u=r(t.points),l=r(e.points);(u.xmax-u.xmin<1||l.ymax-l.ymin<1)&&(l=u={xmin:0,xmax:1024,ymin:0,ymax:768});const p=i(o(t.points,u)),f=i(o(e.points,l));let h=[],d=[];if(p.length>f.length){const[t,e]=c.call(this,f,p);h=e,d=t}else{const[t,e]=c.call(this,p,f);h=t,d=e}const b=s(a(h),u),g=s(a(d),l),m=(n-t.frame)/(e.frame-t.frame),y=[];for(let t=0;t<b.length;t++)y.push(b[t]+(g[t]-b[t])*m);return{points:y,occluded:t.occluded,outside:t.outside,zOrder:t.zOrder}}appendMapping(t,e,n){const r=Object.values(t).map(t=>+t),o=Object.keys(t).map(t=>+t),s=[];function i(t){let e=t,o=t;if(!r.length)throw new u("Interpolation mapping is empty");for(;!r.includes(e);)--e<0&&(e=n.length-1);for(;!r.includes(o);)++o>=n.length&&(o=0);return[e,o]}function a(t,e,r){const o=[];for(;e!==r;)o.push(n[e]),++e>=n.length&&(e=0);o.push(n[r]);let s=0,i=0,a=!1;for(let e=1;e<o.length;e++){const r=o[e],c=o[e-1],u=Math.sqrt(Math.pow(r.x-c.x,2)+Math.pow(r.y-c.y,2));a||(i+=u),s+=u,n[t]===o[e]&&(a=!0)}return s?i/s:0}for(let c=0;c<n.length;c++){const u=r.indexOf(c);if(-1===u){const[r,o]=i(c),u=a(c,r,o),l=n[r],p=n[o],f={x:l.x+(p.x-l.x)*u,y:l.y+(p.y-l.y)*u};e.push(f),t[e.length-1]=c,s.push(e.length-1)}else s.push(o[u])}return s}}class A extends 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It was ignored."),null}t.exports=class{constructor(t){this.startFrame=t.startFrame,this.stopFrame=t.stopFrame,this.frameMeta=t.frameMeta,this.labels=t.labels.reduce((t,e)=>(t[e.id]=e,t),{}),this.shapes={},this.tags={},this.tracks=[],this.objects={},this.count=0,this.flush=!1,this.collectionZ={},this.groups={max:0},this.injection={labels:this.labels,collectionZ:this.collectionZ,groups:this.groups,frameMeta:this.frameMeta}}import(t){for(const e of t.tags){const t=++this.count,n=new f(e,t,this.injection);this.tags[n.frame]=this.tags[n.frame]||[],this.tags[n.frame].push(n),this.objects[t]=n}for(const e of t.shapes){const t=++this.count,n=k(e,t,this.injection);this.shapes[n.frame]=this.shapes[n.frame]||[],this.shapes[n.frame].push(n),this.objects[t]=n}for(const e of t.tracks){const t=++this.count,n=S(e,t,this.injection);n&&(this.tracks.push(n),this.objects[t]=n)}return this}export(){return{tracks:this.tracks.filter(t=>!t.removed).map(t=>t.toJSON()),shapes:Object.values(this.shapes).reduce((t,e)=>(t.push(...e),t),[]).filter(t=>!t.removed).map(t=>t.toJSON()),tags:Object.values(this.tags).reduce((t,e)=>(t.push(...e),t),[]).filter(t=>!t.removed).map(t=>t.toJSON())}}get(t){const{tracks:e}=this,n=this.shapes[t]||[],r=this.tags[t]||[],o=e.concat(n).concat(r).filter(t=>!t.removed),s=[];for(const e of o){const n=e.get(t);if(n.outside&&!n.keyframe)continue;const r=h.call(e,t,n);s.push(r)}return s}merge(t){if(d("shapes for merge",t,null,Array),!t.length)return;const e=t.map(t=>{d("object state",t,null,x);const e=this.objects[t.clientID];if(void 0===e)throw new y("The object has not been saved yet. Call ObjectState.put([state]) before you can merge it");return e}),n={},{label:r,shapeType:o}=t[0];if(!(r.id in this.labels))throw new y(`Unknown label for the task: ${r.id}`);if(!Object.values(w).includes(o))throw new y(`Got unknown shapeType "${o}"`);const s=r.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(let i=0;i<e.length;i++){const a=e[i],c=t[i];if(c.label.id!==r.id)throw new y(`All shape labels are expected to be ${r.name}, but got ${c.label.name}`);if(c.shapeType!==o)throw new y(`All shapes are expected to be ${o}, but got ${c.shapeType}`);if(a instanceof p){if(a.frame in n&&!n[a.frame].outside)throw new y("Expected only one visible shape per frame");n[a.frame]={type:o,frame:a.frame,points:[...a.points],occluded:a.occluded,zOrder:a.zOrder,outside:!1,attributes:Object.keys(a.attributes).reduce((t,e)=>(e in s&&s[e].mutable&&t.push({spec_id:+e,value:a.attributes[e]}),t),[])},a.frame+1 in n||(n[a.frame+1]=JSON.parse(JSON.stringify(n[a.frame])),n[a.frame+1].outside=!0,n[a.frame+1].frame++)}else{if(!(a instanceof l))throw new y(`Trying to merge unknown object type: ${a.constructor.name}. `+"Only shapes and tracks are expected.");{const t={};for(const e of Object.keys(a.shapes)){const r=a.shapes[e];if(e in n&&!n[e].outside){if(r.outside)continue;throw new y("Expected only one visible shape per frame")}let s=!1;for(const e in r.attributes)e in t&&t[e]===r.attributes[e]||(s=!0,t[e]=r.attributes[e]);n[e]={type:o,frame:+e,points:[...r.points],occluded:r.occluded,outside:r.outside,zOrder:r.zOrder,attributes:s?Object.keys(t).reduce((e,n)=>(e.push({spec_id:+n,value:t[n]}),e),[]):[]}}}}}let i=!1;for(const t of Object.keys(n).sort((t,e)=>+t-+e)){if((i=i||n[t].outside)||!n[t].outside)break;delete n[t]}const a=++this.count,c=S({frame:Math.min.apply(null,Object.keys(n).map(t=>+t)),shapes:Object.values(n),group:0,label_id:r.id,attributes:Object.keys(t[0].attributes).reduce((e,n)=>(s[n].mutable||e.push({spec_id:+n,value:t[0].attributes[n]}),e),[])},a,this.injection);this.tracks.push(c),this.objects[a]=c;for(const t of e)t.removed=!0,"function"==typeof t.resetCache&&t.resetCache()}split(t,e){d("object state",t,null,x),d("frame",e,"integer",null);const n=this.objects[t.clientID];if(void 0===n)throw new y("The object has not been saved yet. Call annotations.put([state]) before");if(t.objectType!==O.TRACK)return;const r=Object.keys(n.shapes).sort((t,e)=>+t-+e);if(e<=+r[0]||e>r[r.length-1])return;const o=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{}),s=n.toJSON(),i={type:t.shapeType,points:[...t.points],occluded:t.occluded,outside:t.outside,zOrder:0,attributes:Object.keys(t.attributes).reduce((e,n)=>(o[n].mutable||e.push({spec_id:+n,value:t.attributes[n]}),e),[]),frame:e},a={frame:s.frame,group:0,label_id:s.label_id,attributes:s.attributes,shapes:[]},c=JSON.parse(JSON.stringify(a));c.frame=e,c.shapes.push(JSON.parse(JSON.stringify(i))),s.shapes.map(t=>(delete t.id,t.frame<e?a.shapes.push(JSON.parse(JSON.stringify(t))):t.frame>e&&c.shapes.push(JSON.parse(JSON.stringify(t))),t)),a.shapes.push(i),a.shapes[a.shapes.length-1].outside=!0;let u=++this.count;const l=S(a,u,this.injection);this.tracks.push(l),this.objects[u]=l,u=++this.count;const p=S(c,u,this.injection);this.tracks.push(p),this.objects[u]=p,n.removed=!0,n.resetCache()}group(t,e){d("shapes for group",t,null,Array);const n=t.map(t=>{d("object state",t,null,x);const e=this.objects[t.clientID];if(void 0===e)throw new y("The object has not been saved yet. Call annotations.put([state]) before");return e}),r=e?0:++this.groups.max;for(const t of n)t.group=r,"function"==typeof t.resetCache&&t.resetCache();return r}clear(){this.shapes={},this.tags={},this.tracks=[],this.objects={},this.count=0,this.flush=!0}statistics(){const t={},e={rectangle:{shape:0,track:0},polygon:{shape:0,track:0},polyline:{shape:0,track:0},points:{shape:0,track:0},tags:0,manually:0,interpolated:0,total:0},n=JSON.parse(JSON.stringify(e));for(const n of Object.values(this.labels)){const{name:r}=n;t[r]=JSON.parse(JSON.stringify(e))}for(const e of Object.values(this.objects)){let n=null;if(e instanceof p)n="shape";else if(e instanceof l)n="track";else{if(!(e instanceof f))throw new v(`Unexpected object type: "${n}"`);n="tag"}const r=e.label.name;if("tag"===n)t[r].tags++,t[r].manually++,t[r].total++;else{const{shapeType:o}=e;if(t[r][o][n]++,"track"===n){const n=Object.keys(e.shapes).sort((t,e)=>+t-+e).map(t=>+t);let o=n[0],s=!1;for(const i of n){if(s){const e=i-o-1;t[r].interpolated+=e,t[r].total+=e}s=!e.shapes[i].outside,o=i,s&&(t[r].manually++,t[r].total++)}const i=n[n.length-1];if(i!==this.stopFrame&&!e.shapes[i].outside){const e=this.stopFrame-i;t[r].interpolated+=e,t[r].total+=e}}else t[r].manually++,t[r].total++}}for(const e of Object.keys(t))for(const r of Object.keys(t[e]))if("object"==typeof t[e][r])for(const o of Object.keys(t[e][r]))n[r][o]+=t[e][r][o];else n[r]+=t[e][r];return new b(t,n)}put(t){d("shapes for put",t,null,Array);const e={shapes:[],tracks:[],tags:[]};function n(t,e){const n=+e,r=this.attributes[e];return d("attribute id",n,"integer",null),d("attribute value",r,"string",null),t.push({spec_id:n,value:r}),t}for(const r of t){d("object state",r,null,x),d("state client ID",r.clientID,"undefined",null),d("state frame",r.frame,"integer",null),d("state attributes",r.attributes,null,Object),d("state label",r.label,null,g);const t=Object.keys(r.attributes).reduce(n.bind(r),[]),o=r.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});if("tag"===r.objectType)e.tags.push({attributes:t,frame:r.frame,label_id:r.label.id,group:0});else{d("state occluded",r.occluded,"boolean",null),d("state points",r.points,null,Array);for(const t of r.points)d("point coordinate",t,"number",null);if(!Object.values(w).includes(r.shapeType))throw new y("Object shape must be one of: "+`${JSON.stringify(Object.values(w))}`);if("shape"===r.objectType)e.shapes.push({attributes:t,frame:r.frame,group:0,label_id:r.label.id,occluded:r.occluded||!1,points:[...r.points],type:r.shapeType,z_order:0});else{if("track"!==r.objectType)throw new y("Object type must be one of: "+`${JSON.stringify(Object.values(O))}`);e.tracks.push({attributes:t.filter(t=>!o[t.spec_id].mutable),frame:r.frame,group:0,label_id:r.label.id,shapes:[{attributes:t.filter(t=>o[t.spec_id].mutable),frame:r.frame,occluded:r.occluded||!1,outside:!1,points:[...r.points],type:r.shapeType,z_order:0}]})}}}this.import(e)}select(t,e,n){d("shapes for select",t,null,Array),d("x coordinate",e,"number",null),d("y coordinate",n,"number",null);let r=null,o=null;for(const s of t){if(d("object state",s,null,x),s.outside)continue;const t=this.objects[s.clientID];if(void 0===t)throw new y("The object has not been saved yet. Call annotations.put([state]) before");const i=t.constructor.distance(s.points,e,n);null!==i&&(null===r||i<r)&&(r=i,o=s)}return{state:o,distance:r}}}})()},function(t,e,n){"use strict";var r=n(3);t.exports=function(t,e){var n=[][t];return!n||!r(function(){n.call(null,e||function(){throw 1},1)})}},function(t,e,n){n(2),n(86),n(5),(()=>{const e=n(50),{checkObjectType:r}=n(37),{ObjectShape:o,ObjectType:s,AttributeType:i}=n(19),{DataError:a,ArgumentError:c,ScriptingError:u}=n(6),{Label:l}=n(36);function p(t,n){const r=new e(n);return r.hidden={save:this.save.bind(this,t,r),delete:this.delete.bind(this),up:this.up.bind(this,t,r),down:this.down.bind(this,t,r)},r}function f(t,e){if(t===o.RECTANGLE){if(e.length/2!=2)throw new a(`Rectangle must have 2 points, but got ${e.length/2}`)}else if(t===o.POLYGON){if(e.length/2<3)throw new a(`Polygon must have at least 3 points, but got ${e.length/2}`)}else if(t===o.POLYLINE){if(e.length/2<2)throw new a(`Polyline must have at least 2 points, but got ${e.length/2}`)}else{if(t!==o.POINTS)throw new c(`Unknown value of shapeType has been recieved ${t}`);if(e.length/2<1)throw new a(`Points must have at least 1 points, but got ${e.length/2}`)}}function h(t,e){if(t===o.POINTS)return!0;let n=Number.MAX_SAFE_INTEGER,r=Number.MIN_SAFE_INTEGER,s=Number.MAX_SAFE_INTEGER,i=Number.MIN_SAFE_INTEGER;for(let t=0;t<e.length-1;t+=2)n=Math.min(n,e[t]),r=Math.max(r,e[t]),s=Math.min(s,e[t+1]),i=Math.max(i,e[t+1]);if(t===o.POLYLINE){return Math.max(r-n,i-s)>=3}return(r-n)*(i-s)>=9}function d(t,e){const{values:n}=e,r=e.inputType;if("string"!=typeof t)throw new c(`Attribute value is expected to be string, but got ${typeof t}`);return r===i.NUMBER?+t>=+n[0]&&+t<=+n[1]&&!((+t-+n[0])%+n[2]):r===i.CHECKBOX?["true","false"].includes(t.toLowerCase()):n.includes(t)}class b{constructor(t,e,n){this.taskLabels=n.labels,this.clientID=e,this.serverID=t.id,this.group=t.group,this.label=this.taskLabels[t.label_id],this.frame=t.frame,this.removed=!1,this.lock=!1,this.attributes=t.attributes.reduce((t,e)=>(t[e.spec_id]=e.value,t),{}),this.appendDefaultAttributes(this.label),n.groups.max=Math.max(n.groups.max,this.group)}appendDefaultAttributes(t){const e=t.attributes;for(const t of e)t.id in this.attributes||(this.attributes[t.id]=t.defaultValue)}delete(t){return this.lock&&!t||(this.removed=!0),!0}}class g extends b{constructor(t,e,n,r){super(t,e,r),this.frameMeta=r.frameMeta,this.collectionZ=r.collectionZ,this.color=n,this.shapeType=null}_getZ(t){return this.collectionZ[t]=this.collectionZ[t]||{max:0,min:0},this.collectionZ[t]}save(){throw new u("Is not implemented")}get(){throw new u("Is not implemented")}toJSON(){throw new u("Is not implemented")}up(t,e){const n=this._getZ(t);n.max++,e.zOrder=n.max}down(t,e){const n=this._getZ(t);n.min--,e.zOrder=n.min}}class m extends g{constructor(t,e,n,r){super(t,e,n,r),this.points=t.points,this.occluded=t.occluded,this.zOrder=t.z_order;const o=this._getZ(this.frame);o.max=Math.max(o.max,this.zOrder||0),o.min=Math.min(o.min,this.zOrder||0)}toJSON(){return{type:this.shapeType,clientID:this.clientID,occluded:this.occluded,z_order:this.zOrder,points:[...this.points],attributes:Object.keys(this.attributes).reduce((t,e)=>(t.push({spec_id:e,value:this.attributes[e]}),t),[]),id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group}}get(t){if(t!==this.frame)throw new u("Got frame is not equal to the frame of the shape");return{objectType:s.SHAPE,shapeType:this.shapeType,clientID:this.clientID,serverID:this.serverID,occluded:this.occluded,lock:this.lock,zOrder:this.zOrder,points:[...this.points],attributes:Object.assign({},this.attributes),label:this.label,group:this.group,color:this.color}}save(t,e){if(t!==this.frame)throw new u("Got frame is not equal to the frame of the shape");if(this.lock&&e.lock)return p.call(this,t,this.get(t));const n=this.get(t),o=e.updateFlags;if(o.label&&(r("label",e.label,null,l),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label)),o.attributes){const t=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});for(const r of Object.keys(e.attributes)){const o=e.attributes[r];if(!(r in t&&d(o,t[r])))throw new c(`Trying to save unknown attribute with id ${r} and value ${o}`);n.attributes[r]=o}}if(o.points){r("points",e.points,null,Array),f(this.shapeType,e.points);const{width:o,height:s}=this.frameMeta[t],i=[];for(let t=0;t<e.points.length-1;t+=2){const n=e.points[t],a=e.points[t+1];r("coordinate",n,"number",null),r("coordinate",a,"number",null),i.push(Math.clamp(n,0,o),Math.clamp(a,0,s))}h(this.shapeType,i)&&(n.points=i)}if(o.occluded&&(r("occluded",e.occluded,"boolean",null),n.occluded=e.occluded),o.group&&(r("group",e.group,"integer",null),n.group=e.group),o.zOrder&&(r("zOrder",e.zOrder,"integer",null),n.zOrder=e.zOrder),o.lock&&(r("lock",e.lock,"boolean",null),n.lock=e.lock),o.color){if(r("color",e.color,"string",null),/^#[0-9A-F]{6}$/i.test(e.color))throw new c(`Got invalid color value: "${e.color}"`);n.color=e.color}o.reset();for(const t of Object.keys(n))t in this&&(this[t]=n[t]);return p.call(this,t,this.get(t))}}class y extends g{constructor(t,e,n,r){super(t,e,n,r),this.shapes=t.shapes.reduce((t,e)=>{t[e.frame]={serverID:e.id,occluded:e.occluded,zOrder:e.z_order,points:e.points,outside:e.outside,attributes:e.attributes.reduce((t,e)=>(t[e.spec_id]=e.value,t),{})};const n=this._getZ(e.frame);return n.max=Math.max(n.max,e.z_order),n.min=Math.min(n.min,e.z_order),t},{}),this.cache={}}toJSON(){const t=this.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});return{clientID:this.clientID,id:this.serverID,frame:this.frame,label_id:this.label.id,group:this.group,attributes:Object.keys(this.attributes).reduce((e,n)=>(t[n].mutable||e.push({spec_id:n,value:this.attributes[n]}),e),[]),shapes:Object.keys(this.shapes).reduce((e,n)=>(e.push({type:this.shapeType,occluded:this.shapes[n].occluded,z_order:this.shapes[n].zOrder,points:[...this.shapes[n].points],outside:this.shapes[n].outside,attributes:Object.keys(this.shapes[n].attributes).reduce((e,r)=>(t[r].mutable&&e.push({spec_id:r,value:this.shapes[n].attributes[r]}),e),[]),id:this.shapes[n].serverID,frame:+n}),e),[])}}get(t){if(!(t in this.cache)){const e=Object.assign({},this.getPosition(t),{attributes:this.getAttributes(t),group:this.group,objectType:s.TRACK,shapeType:this.shapeType,clientID:this.clientID,serverID:this.serverID,lock:this.lock,color:this.color});this.cache[t]=e}const e=JSON.parse(JSON.stringify(this.cache[t]));return e.label=this.label,e}neighborsFrames(t){const e=Object.keys(this.shapes).map(t=>+t);let n=Number.MAX_SAFE_INTEGER,r=Number.MAX_SAFE_INTEGER;for(const o of e){const e=Math.abs(t-o);o<=t&&e<n?n=e:e<r&&(r=e)}return{leftFrame:n===Number.MAX_SAFE_INTEGER?null:t-n,rightFrame:r===Number.MAX_SAFE_INTEGER?null:t+r}}getAttributes(t){const e={};for(const t in this.attributes)Object.prototype.hasOwnProperty.call(this.attributes,t)&&(e[t]=this.attributes[t]);const n=Object.keys(this.shapes).sort((t,e)=>+t-+e);for(const r of n)if(r<=t){const{attributes:t}=this.shapes[r];for(const n in t)Object.prototype.hasOwnProperty.call(t,n)&&(e[n]=t[n])}return e}save(t,e){if(this.lock&&e.lock)return p.call(this,t,this.get(t));const n=Object.assign(this.get(t));n.attributes=Object.assign(n.attributes),n.points=[...n.points];const o=e.updateFlags;let s=!1;o.label&&(r("label",e.label,null,l),n.label=e.label,n.attributes={},this.appendDefaultAttributes.call(n,n.label));const i=n.label.attributes.reduce((t,e)=>(t[e.id]=e,t),{});if(o.attributes)for(const t of Object.keys(e.attributes)){const r=e.attributes[t];if(!(t in i&&d(r,i[t])))throw new c(`Trying to save unknown attribute with id ${t} and value ${r}`);n.attributes[t]=r}if(o.points){r("points",e.points,null,Array),f(this.shapeType,e.points);const{width:o,height:i}=this.frameMeta[t],a=[];for(let t=0;t<e.points.length-1;t+=2){const n=e.points[t],s=e.points[t+1];r("coordinate",n,"number",null),r("coordinate",s,"number",null),a.push(Math.clamp(n,0,o),Math.clamp(s,0,i))}h(this.shapeType,a)&&(n.points=a,s=!0)}if(o.occluded&&(r("occluded",e.occluded,"boolean",null),n.occluded=e.occluded,s=!0),o.outside&&(r("outside",e.outside,"boolean",null),n.outside=e.outside,s=!0),o.group&&(r("group",e.group,"integer",null),n.group=e.group),o.zOrder&&(r("zOrder",e.zOrder,"integer",null),n.zOrder=e.zOrder,s=!0),o.lock&&(r("lock",e.lock,"boolean",null),n.lock=e.lock),o.color){if(r("color",e.color,"string",null),/^#[0-9A-F]{6}$/i.test(e.color))throw new c(`Got invalid color value: "${e.color}"`);n.color=e.color}o.keyframe&&r("keyframe",e.keyframe,"boolean",null);for(const e of Object.keys(n))e in this&&(this[e]=n[e]),this.cache[t][e]=n[e];if(o.attributes)for(const r of Object.keys(n.attributes))i[r].mutable||(this.shapes[t].attributes[r]=e.attributes[r],this.shapes[t].attributes[r]=e.attributes[r]);if(o.label)for(const t of Object.values(this.shapes))t.attributes={};if(o.keyframe&&!e.keyframe){for(const e in this.cache)+e>t&&delete this.cache[e];return this.cache[t].keyframe=!1,delete this.shapes[t],o.reset(),p.call(this,t,this.get(t))}if(s||o.keyframe&&e.keyframe){for(const e in this.cache)+e>t&&delete this.cache[e];if(this.cache[t].keyframe=!0,e.keyframe=!0,this.shapes[t]={frame:t,zOrder:n.zOrder,points:n.points,outside:n.outside,occluded:n.occluded,attributes:{}},o.attributes)for(const r of Object.keys(n.attributes))i[r].mutable&&(this.shapes[t].attributes[r]=e.attributes[r],this.shapes[t].attributes[r]=e.attributes[r])}return o.reset(),p.call(this,t,this.get(t))}getPosition(t){const{leftFrame:e,rightFrame:n}=this.neighborsFrames(t),r=Number.isInteger(n)?this.shapes[n]:null,o=Number.isInteger(e)?this.shapes[e]:null;if(o&&e===t)return{points:[...o.points],occluded:o.occluded,outside:o.outside,zOrder:o.zOrder,keyframe:!0};if(r&&o)return Object.assign({},this.interpolatePosition(o,r,(t-e)/(n-e)),{keyframe:!1});if(r)return{points:[...r.points],occluded:r.occluded,outside:!0,zOrder:0,keyframe:!1};if(o)return{points:[...o.points],occluded:o.occluded,outside:o.outside,zOrder:0,keyframe:!1};throw new u(`No one neightbour frame found for the track with client ID: "${this.id}"`)}delete(t){return this.lock&&!t||(this.removed=!0,this.resetCache()),!0}resetCache(){this.cache={}}}class v extends m{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.RECTANGLE,f(this.shapeType,this.points)}static distance(t,e,n){const[r,o,s,i]=t;return e>=r&&e<=s&&n>=o&&n<=i?Math.min.apply(null,[e-r,n-o,s-e,i-n]):null}}class w extends m{constructor(t,e,n,r){super(t,e,n,r)}}class O extends w{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.POLYGON,f(this.shapeType,this.points)}static distance(t,e,n){function r(t,r,o,s){return(o-t)*(n-r)-(e-t)*(s-r)}let o=0;const s=[];for(let i=0,a=t.length-2;i<t.length-1;a=i,i+=2){const c=t[a],u=t[a+1],l=t[i],p=t[i+1];u<=n?p>n&&r(c,u,l,p)>0&&o++:p<=n&&r(c,u,l,p)<0&&o--;const f=e-(u-p),h=n-(l-c);(f-c)*(l-f)>=0&&(h-u)*(p-h)>=0?s.push(Math.sqrt(Math.pow(e-f,2)+Math.pow(n-h,2))):s.push(Math.min(Math.sqrt(Math.pow(c-e,2)+Math.pow(u-n,2)),Math.sqrt(Math.pow(l-e,2)+Math.pow(p-n,2))))}return 0!==o?Math.min.apply(null,s):null}}class x extends w{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.POLYLINE,f(this.shapeType,this.points)}static distance(t,e,n){const r=[];for(let o=0;o<t.length-2;o+=2){const s=t[o],i=t[o+1],a=t[o+2],c=t[o+3];(e-s)*(a-e)>=0&&(n-i)*(c-n)>=0?r.push(Math.abs((c-i)*e-(a-s)*n+a*i-c*s)/Math.sqrt(Math.pow(c-i,2)+Math.pow(a-s,2))):r.push(Math.min(Math.sqrt(Math.pow(s-e,2)+Math.pow(i-n,2)),Math.sqrt(Math.pow(a-e,2)+Math.pow(c-n,2))))}return Math.min.apply(null,r)}}class j extends w{constructor(t,e,n,r){super(t,e,n,r),this.shapeType=o.POINTS,f(this.shapeType,this.points)}static distance(t,e,n){const r=[];for(let o=0;o<t.length;o+=2){const 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