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{ ObservableValue } from 'observable';\r\nimport { wait } from 'time';\r\nimport { Lazy } from 'caching';\r\nimport { error } from 'console';\r\nimport { splitFirst } from 'utilities/string';\r\nimport { AsyncQueue } from 'queuing';\r\nimport * as $ from 'jquery';\r\n\r\nfunction isURL( url: Object ): url is URL {\r\n\treturn url && typeof url[ 'href' ] === 'string';\r\n}\r\n\r\nfunction getURL( url: string|URL, baseURI = document.baseURI ): URL {\r\n\tif( isURL( url ) ) return url;\r\n\telse return new URL( url, baseURI );\r\n}\r\n\r\nexport class AjaxContext {\r\n\tpublic ajax<T>( url: string|URL, ...args: any[] ): AjaxResult<T> {\r\n\t\tconst aurl = <any>url;\r\n\t\tif( aurl && typeof aurl.url === 'string' ) {\r\n\t\t\taurl.url = url = getURL( aurl.url ).href;\r\n\t\t\targs = [ aurl ].concat( args );\r\n\t\t}\r\n\t\treturn this.delegate<T>( $.ajax, url, args );\r\n\t}\r\n\r\n\tpublic get<T>( url: string|URL, ...args: any[] ): AjaxResult<T> {\r\n\t\treturn this.delegate<T>( $.get, url, args );\r\n\t}\r\n\r\n\tpublic getJSON<T>( url: string|URL, ...args: any[] ): AjaxResult<T> {\r\n\t\treturn this.delegate<T>( $.getJSON, url, args );\r\n\t}\r\n\r\n\tpublic post<T>( url: string|URL, ...args: any[] ): AjaxResult<T> {\r\n\t\treturn this.delegate<T>( $.post, url, args );\r\n\t}\r\n\r\n\tpublic load( dest: HTMLElement, url: string|URL, selector?: string, data?: any ): AjaxResult<void> {\r\n\t\tconst $dest = $( dest ),\r\n\t\t\tdeferred = $.Deferred(),\r\n\t\t\tdataType = 'html',\r\n\t\t\ttype = typeof data === 'object' ? 'POST' : 'GET';\r\n\r\n\t\tthis.ajax( getURL( url ).href, { url, type, dataType, data } )\r\n\t\t\t.then( ( html: string ) => {\r\n\t\t\t\ttry {\r\n\t\t\t\t\tif( selector ) {\r\n\t\t\t\t\t\t$dest.html( <any>$( '<div>' ).append( $.parseHTML( html ) ).find( selector ) );\r\n\t\t\t\t\t} else {\r\n\t\t\t\t\t\t$dest.html( html );\r\n\t\t\t\t\t}\r\n\t\t\t\t\tdeferred.resolve();\r\n\t\t\t\t} catch( ex ) {\r\n\t\t\t\t\terror( ex );\r\n\t\t\t\t\tdeferred.reject( ex );\r\n\t\t\t\t}\r\n\t\t\t}, ex => { deferred.reject( ex ); } );\r\n\r\n\t\treturn <any>deferred;\r\n\t}\r\n\r\n\tprivate delegate<T>( method: (...args) => JQueryXHR, url: string|URL, args: any[] ) {\r\n\t\tconst xhr: JQueryXHR = method.apply( $, [ getURL( url ).href ].concat( args ) ),\r\n\t\t\tdeferred = this.newDeferred();\r\n\t\tdeferred.promise().always( () => { this.pending.value = false; } );\r\n\t\tthis.pending.value = true;\r\n\t\txhr.then(\r\n\t\t\t( data: T, textStatus: string, jqXHR: JQueryXHR ) => { deferred.resolve( data, textStatus, jqXHR ); },\r\n\t\t\t( jqXHR: JQueryXHR, textStatus: string, errorThrown: any ) => {\r\n\t\t\t\terror( errorThrown || textStatus );\r\n\t\t\t\tdeferred.reject( { jqXHR, textStatus, errorThrown } );\r\n\t\t\t}\r\n\t\t);\r\n\t\treturn deferred;\r\n\t}\r\n\r\n\tpublic cancel() {\r\n\t\tthis.newDeferred();\r\n\t}\r\n\r\n\tprivate newDeferred() {\r\n\t\tif( this._deferred ) {\r\n\t\t\tthis._deferred.reject( new Error( 'New request issued before previous request completed.' ) );\r\n\t\t}\r\n\t\treturn this._deferred = $.Deferred();\r\n\t}\r\n\r\n\tprivate _deferred: JQueryDeferred<any>;\r\n\r\n\tpublic pending = new ObservableValue<boolean>( false );\r\n}\r\n\r\n// deprecated: use AjaxContext\r\nexport class Context extends AjaxContext {}\r\n\r\nexport class QueueAjaxContext {\r\n\tpublic constructor() {\r\n\t\tthis.queue.onRetry = () => wait( this.retryDelay );\r\n\t}\r\n\r\n\tpublic ajax<T>( url: string|URL, ...args: any[] ): Promise<T> {\r\n\t\tconst retval = this.queue.enqueue<T>( () => ( new AjaxContext ).ajax( url, ...args ), this.retries );\r\n\t\tthis.wait();\r\n\t\treturn retval;\r\n\t}\r\n\r\n\tpublic get<T>( url: string|URL, ...args: any[] ): Promise<T> {\r\n\t\tconst retval = this.queue.enqueue<T>( () => ( new AjaxContext ).get( url, ...args ), this.retries );\r\n\t\tthis.wait();\r\n\t\treturn retval;\r\n\t}\r\n\r\n\tpublic getJSON<T>( url: string|URL, ...args: any[] ): Promise<T> {\r\n\t\tconst retval = this.queue.enqueue<T>( () => ( new AjaxContext ).getJSON( url, ...args ), this.retries );\r\n\t\tthis.wait();\r\n\t\treturn retval;\r\n\t}\r\n\r\n\tpublic post<T>( url: string|URL, ...args: any[] ): Promise<T> {\r\n\t\tconst retval = this.queue.enqueue<T>( () => ( new AjaxContext ).post( url, ...args ), this.retries );\r\n\t\tthis.wait();\r\n\t\treturn retval;\r\n\t}\r\n\r\n\tpublic load( dest: HTMLElement, url: string|URL, selector?: string, data?: any ): Promise<void> {\r\n\t\tconst retval = this.queue.enqueue<void>( () => ( new AjaxContext ).load( dest, url, selector, data ), this.retries );\r\n\t\tthis.wait();\r\n\t\treturn retval;\r\n\t}\r\n\r\n\tpublic wait( milliseconds = this.waitTime ) {\r\n\t\treturn this.queue.enqueue( () => wait( milliseconds ) );\r\n\t}\r\n\r\n\tpublic waitTime = 0;\r\n\tpublic retryDelay = 100;\r\n\tpublic retries = 0;\r\n\r\n\tpublic queue = new AsyncQueue;\r\n}\r\n\r\nexport interface AjaxResult<T> extends PromiseLike<T> {\r\n\tthen( resolve: ( data: T, textStatus: string, jqXHR: JQueryXHR ) => void, reject?: ( jqXHR: JQueryXHR, textStatus: string, errorThrown: any ) => void );\r\n\talways( alwaysCallbacks1: JQueryPromiseCallback<T>, ...alwaysCallbacks2: JQueryPromiseCallback<T>[] );\r\n\treject( ...args: any[] );\r\n}\r\n\r\nexport abstract class WebService {\r\n\tconstructor( context = new AjaxContext ) {\r\n\t\tthis.context = context;\r\n\t}\r\n\r\n\tprotected context: AjaxContext;\r\n\r\n\tpublic static getUrl( url: string|URL ) {\r\n\t\tconst baseUrl = getURL( $( 'html' ).attr( 'data-services-baseurl' ) || '/' );\r\n\t\treturn getURL( url, baseUrl.href );\r\n\t}\r\n\r\n\tpublic cancel() {\r\n\t\tthis.context.cancel();\r\n\t}\r\n\r\n\tpublic get pending() {\r\n\t\treturn this.context.pending;\r\n\t}\r\n}\r\n"]}