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GeezerVison is showing github.com — NativeScript-Use/packages/nativescript-task/index.ts at main · NativeScript-Use/NativeScript-Use Expand file tree/ Copy pathindex.tsMore file actions 418 lines (369 loc) · 12.5 KB / Copy pathindex.tsFile metadata and controls418 lines (369 loc) · 12.5 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 import { Observable } from '@nativescript/core'; import { JSONfn } from './JSONfn'; export * from './defineWorker'; /** * Describes a task function. * * @param {TState} [state] The optional value to submit to the function. * * @return {TResult} The result of the function. */ export type TaskFunc<TState, TResult, TUpdate> = (ctx: TaskContext<TState, TUpdate>) => TResult; export type TaskFuncUpdate<TUpdate> = (update: { data: TUpdate }) => void; export interface OnData<Data> { data: Data; } /** * Describes a task context. */ export interface TaskContext<TState = any, TUpdate = any> { state: TState; onProgressUpdate: (dataUpdate: TUpdate) => void; [key: string]: any; } /** * Describes a result of a task. */ export interface TaskResult<TState, TResult> { /** * The result data (on success) */ data?: TResult; /** * The error (if occurred) */ error?: any; /** * The submitted value. */ state?: TState; } export interface TaskUpdate<TUpdate> { /** * The update data (on update) */ data: TUpdate; } /** * List of task states. */ export enum TaskStatus { Starting, /** * The task has been initialized but has not yet been invoked. */ Created, /** * The task completed due to an unhandled exception. */ Faulted, /** * The task completed execution successfully. */ RanToCompletion, /** * The task is running but has not yet completed. */ Running, /** * The task has been scheduled for execution but has not yet begun executing. */ WaitingToRun, } type GeneralCallback = ((data: any | undefined) => void) | undefined; export type GlobalWorkerConfiguration = { stickyWorker?: boolean; newWorkerIfGlobalIsUsed?: boolean; startGlobalWorker?: boolean }; export type DataWorker = { worker?: Worker; isGlobal: boolean; running: boolean; globalResolve?: { [key: string]: GeneralCallback }; globalReject?: { [key: string]: GeneralCallback }; globalOnUpdate?: { [key: string]: GeneralCallback } }; let dataGlobalWorker: DataWorker = { worker: null!, isGlobal: true, running: false, globalResolve: {}, globalReject: {}, globalOnUpdate: {} }; let globalConfiguration: GlobalWorkerConfiguration = { stickyWorker: true, newWorkerIfGlobalIsUsed: true, startGlobalWorker: true }; /** * A task. */ export class Task<TState, TResult, TUpdate> extends Observable { /** * Stores the function to invoke. */ protected readonly _FUNC: TaskFunc<TState, TResult, TUpdate>; protected readonly _FUNC_UPDATE?: TaskFuncUpdate<TUpdate>; /** * Stores the error of the last execution. */ protected _error: any; /** * Stores the current task state. */ protected _status: TaskStatus = TaskStatus.Starting; protected dataWorker: DataWorker = { worker: null!, isGlobal: false, running: false }; protected id = ''; /** * Initializes a new instance of that class. * * @param {TaskFunc<TState, TResult>} func The function to invoke. */ constructor(func: TaskFunc<TState, TResult, TUpdate>, funcUptade?: TaskFuncUpdate<TUpdate>) { super(); if (func !== null && func !== undefined) { if (typeof func !== 'function') { throw "'func' must be a function!"; } } this._FUNC = func; this._FUNC_UPDATE = funcUptade; this.updateStatus(TaskStatus.Created); } public static globalWorkerConfig(options: GlobalWorkerConfiguration) { globalConfiguration = { ...globalConfiguration, ...options }; if (globalConfiguration.startGlobalWorker) { Task.initGlobalWorker(); } } public static initGlobalWorker(): Worker { if (dataGlobalWorker.worker == null) { dataGlobalWorker.worker = new Worker('~/globalWorker'); } return dataGlobalWorker.worker; } private newWorker() { return new Worker('~/globalWorker'); } public static finishGlobalWorker() { dataGlobalWorker.worker?.terminate(); dataGlobalWorker.worker = null!; dataGlobalWorker.running = false; } /** * Creates a new task. * * @param {TaskFunc<TResult>} func The function to invoke. * * @return {Task<TResult>} The new task. */ public static newTask<TResult, TUpdate>(func: TaskFunc<any, TResult, TUpdate>, onProgressUpdate?: TaskFuncUpdate<TUpdate>): Task<any, TResult, TUpdate> { return new Task<any, TResult, TUpdate>(func, onProgressUpdate); } /** * Creates and starts a new task. * * @param {TaskFunc<TResult>} func The function to invoke. * @param {TState} [state] The optional value / object for the execution. * * @return {Promise<TResult>} The promise. */ public static start<TState, TResult, TUpdate>(func: TaskFunc<TState, TResult, TUpdate>, options?: { state?: TState; onProgressUpdate?: TaskFuncUpdate<TUpdate>; attachToContextFunctions?: {}; performance?: boolean }): Promise<TaskResult<TState, TResult>> { return Task.newTask<TResult, TUpdate>(func, options?.onProgressUpdate).start(options); } /** * Gets the error of the last execution. */ public get error(): any { return this._error; } /** * Gets the underyling function to invoke. */ public get func(): TaskFunc<TState, TResult, TUpdate> { return this._FUNC; } /** * Gets the underyling upudate function to invoke. */ public get funcUpdate(): TaskFuncUpdate<TUpdate> | undefined { return this._FUNC_UPDATE; } public getWorker(): DataWorker { if (globalConfiguration.newWorkerIfGlobalIsUsed && dataGlobalWorker.running) { return { worker: this.newWorker(), isGlobal: false, running: false }; } if (dataGlobalWorker.worker === null) { dataGlobalWorker.worker = this.newWorker(); return { worker: dataGlobalWorker.worker, isGlobal: true, running: false }; } else { return { worker: dataGlobalWorker.worker, isGlobal: true, running: false }; } } /** * Starts the task. * * @param {TState} [state] The optional value to submit to the function. * * @return {Promise<TaskResult<TState, TResult>>} The promise. */ public start<TState>(options?: { state?: TState; attachToContextFunctions?: { [key: string]: any }; performance?: boolean }): Promise<TaskResult<TState, TResult>> { this.id = Date.now().toString(); let me = this; return new Promise<TaskResult<TState, TResult>>((resolve, reject) => { let completed = (id: string, err: any, data?: TResult) => { if (err) { const rejectFunction = me.getReject(id, reject); if (rejectFunction) { rejectFunction({ error: err, state: options?.state, }); } } else { const resolveFunction = me.getResolve(id, resolve); if (resolveFunction) { resolveFunction({ data: data, state: options?.state, }); } } if (options?.performance) { console.timeEnd('RunWorker'); } me.removeGlobalCallback(id); me.checkTerminateWorker(data); me.updateError(err); }; switch (me._status) { case TaskStatus.Created: case TaskStatus.Faulted: case TaskStatus.RanToCompletion: break; default: completed('', new Error(`Cannot start while in '${TaskStatus[me._status]}' state!`)); return; } try { me.updateStatus(TaskStatus.WaitingToRun); me.dataWorker = me.getWorker(); const worker: Worker = me.dataWorker.worker as Worker; me.dataWorker.running = true; if (me.dataWorker.isGlobal && dataGlobalWorker.globalResolve && dataGlobalWorker.globalReject && dataGlobalWorker.globalOnUpdate) { dataGlobalWorker.running = true; dataGlobalWorker.globalResolve[me.id] = resolve; dataGlobalWorker.globalReject[me.id] = reject; dataGlobalWorker.globalOnUpdate[me.id] = me._FUNC_UPDATE; } worker.onmessage = function (msg) { let message = msg.data; let executionId = ''; if (message) { message = JSON.parse(message); executionId = message.id; } if (message?.onProgressUpdate === true) { const onUpdateFuncion = me.getOnUpdate(executionId); if (onUpdateFuncion) { onUpdateFuncion({ data: message.dataUpdate }); } } else { me.updateStatus(TaskStatus.RanToCompletion); completed(executionId, null, message.result); } }; worker.onerror = function (err) { const idExecution = JSON.parse(err.message.replace('Uncaught Error: ', ''))?.id; me.updateStatus(TaskStatus.Faulted); completed(idExecution, err); }; let func: any; if (me._FUNC) { func = {}; func.body = JSONfn.stringify(me._FUNC); if (options?.attachToContextFunctions && Object.keys(options?.attachToContextFunctions).length > 0) { // @ts-ignore const functionsToAttach = Object.keys(options.attachToContextFunctions).reduce((resultObject: any, keyFunction: string) => { // @ts-ignore resultObject[keyFunction] = JSONfn.stringify(options.attachToContextFunctions[keyFunction]); return resultObject; }, {}); func.attachToContextFunctions = functionsToAttach; } } if (options?.performance) { console.time('RunUI'); // @ts-ignore me._FUNC({ state: options?.state, ...options?.attachToContextFunctions }); console.timeEnd('RunUI'); console.time('RunWorker'); } me.updateStatus(TaskStatus.Running); worker.postMessage( JSON.stringify({ id: me.id, func: func, state: options?.state, }) ); } catch (e) { console.log(e); me.updateStatus(TaskStatus.Faulted); completed(me.id, e); } }); } private getReject(id: string, reject: (data: any) => void) { if (this.dataWorker.isGlobal) { return dataGlobalWorker.globalReject ? dataGlobalWorker.globalReject[id] : null; } return reject; } private getResolve(id: string, resolve: (data: any) => void) { if (this.dataWorker.isGlobal) { return dataGlobalWorker.globalResolve ? dataGlobalWorker.globalResolve[id] : null; } return resolve; } private getOnUpdate(id: string) { if (this.dataWorker.isGlobal) { return dataGlobalWorker.globalOnUpdate ? dataGlobalWorker.globalOnUpdate[id] : null; } return this._FUNC_UPDATE; } private removeGlobalCallback(id: string) { if (dataGlobalWorker.globalResolve && dataGlobalWorker.globalResolve[id]) delete dataGlobalWorker.globalResolve[id]; if (dataGlobalWorker.globalReject && dataGlobalWorker.globalReject[id]) delete dataGlobalWorker.globalReject[id]; if (dataGlobalWorker.globalOnUpdate && dataGlobalWorker.globalOnUpdate[id]) delete dataGlobalWorker.globalOnUpdate[id]; } private checkTerminateWorker(result: any) { if ((!this.dataWorker.isGlobal && result?.onProgressUpdate !== true) || (!globalConfiguration.stickyWorker && dataGlobalWorker.isGlobal && dataGlobalWorker.globalResolve && Object.keys(dataGlobalWorker.globalResolve).length === 0)) { this.dataWorker.worker?.terminate(); this.dataWorker.worker = null!; if (this.dataWorker.isGlobal) { Task.finishGlobalWorker(); } } if (result?.onProgressUpdate !== true) { this.dataWorker.running = false; if (this.dataWorker.isGlobal && dataGlobalWorker.globalResolve && Object.keys(dataGlobalWorker.globalResolve).length === 0) dataGlobalWorker.running = false; } } /** * Gets the current status. */ public get status(): TaskStatus { return this._status; } /** * Updates the error value. * * @param {TaskStatus} newValue The new value. * * @return {boolean} Property change has been raised for 'error' property or not. */ protected updateError(newValue: any): boolean { if (newValue !== this._error) { this._error = newValue; this.notifyPropertyChange('error', newValue); return true; } return false; } /** * Updates the current status. * * @param {TaskStatus} newValue The new value. * * @return {boolean} Property change has been raised for 'status' property or not. */ protected updateStatus(newValue: TaskStatus): boolean { if (newValue !== this._status) { this._status = newValue; this.notifyPropertyChange('status', newValue); return true; } return false; } } |
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