ionic-image-loader-v7/fesm2020/ionic-image-loader-v7.mjs.map

ionic-image-loader to Ionic 6

{"version":3,"file":"ionic-image-loader-v7.mjs","sources":["../../../projects/ionic-image-loader-v7/src/lib/services/image-loader-config.service.ts","../../../projects/ionic-image-loader-v7/src/lib/services/image-loader.service.ts","../../../projects/ionic-image-loader-v7/src/lib/ionic-image-loader.component.ts","../../../projects/ionic-image-loader-v7/src/lib/ionic-image-loader.module.ts","../../../projects/ionic-image-loader-v7/src/public-api.ts","../../../projects/ionic-image-loader-v7/src/ionic-image-loader-v7.ts"],"sourcesContent":["import {HttpHeaders} from '@angular/common/http';\r\nimport {Injectable} from '@angular/core';\r\n\r\n@Injectable({\r\n    providedIn: 'root',\r\n})\r\nexport class ImageLoaderConfigService {\r\n    debugMode = false;\r\n\r\n    spinnerEnabled = true;\r\n\r\n    fallbackAsPlaceholder = false;\r\n\r\n    backgroundSize = 'contain';\r\n\r\n    backgroundRepeat = 'no-repeat';\r\n\r\n    display = 'block';\r\n\r\n    width = '100%';\r\n\r\n    height = '100%';\r\n\r\n    useImg = false;\r\n\r\n    fallbackUrl;\r\n\r\n    concurrency = 5;\r\n\r\n    maxCacheSize = -1;\r\n\r\n    maxCacheAge = -1;\r\n\r\n    imageReturnType: 'base64' | 'uri' = 'uri';\r\n\r\n    spinnerName;\r\n\r\n    spinnerColor;\r\n\r\n    httpHeaders: HttpHeaders;\r\n\r\n    // Must be default 'true' for the new WebView to show images\r\n    fileNameCachedWithExtension = true;\r\n\r\n    fallbackFileNameCachedExtension = '.jpg';\r\n\r\n    cacheDirectoryType: 'cache' | 'data' | 'external' = 'cache';\r\n\r\n    private _cacheDirectoryName = 'image-loader-cache';\r\n\r\n\r\n    get cacheDirectoryName() {\r\n        return this._cacheDirectoryName;\r\n    }\r\n\r\n    set cacheDirectoryName(name) {\r\n        name.replace(/\\W/g, '');\r\n        this._cacheDirectoryName = name;\r\n    }\r\n\r\n    /**\r\n     * Enables debug mode to receive console logs, errors, warnings\r\n     */\r\n    enableDebugMode() {\r\n        this.debugMode = true;\r\n    }\r\n\r\n    /**\r\n     * Enable/Disable the spinner by default. Defaults to true.\r\n     * @param enable set to true to enable\r\n     */\r\n    enableSpinner(enable: boolean) {\r\n        this.spinnerEnabled = enable;\r\n    }\r\n\r\n    /**\r\n     * Enable/Disable the fallback image as placeholder instead of the spinner. Defaults to false.\r\n     * @param enable set to true to enable\r\n     */\r\n    enableFallbackAsPlaceholder(enable: boolean) {\r\n        this.fallbackAsPlaceholder = enable;\r\n    }\r\n\r\n    /**\r\n     * Sets the cache directory name. Defaults to 'image-loader-cache'\r\n     * @param name name of directory\r\n     */\r\n    setCacheDirectoryName(name: string) {\r\n        this.cacheDirectoryName = name;\r\n    }\r\n\r\n    /**\r\n     * Set default height for images that are not using <img> tag\r\n     * @param height height\r\n     */\r\n    setHeight(height: string) {\r\n        this.height = height;\r\n    }\r\n\r\n    /**\r\n     * Set default width for images that are not using <img> tag\r\n     * @param width Width\r\n     */\r\n    setWidth(width: string) {\r\n        this.width = width;\r\n    }\r\n\r\n    /**\r\n     * Enable display mode for images that are not using <img> tag\r\n     * @param display Display mode\r\n     */\r\n    setDisplay(display: string) {\r\n        this.display = display;\r\n    }\r\n\r\n    /**\r\n     * Use <img> tag by default\r\n     * @param use set to true to use <img> tag by default\r\n     */\r\n    useImageTag(use: boolean) {\r\n        this.useImg = use;\r\n    }\r\n\r\n    /**\r\n     * Set default background size for images that are not using <img> tag\r\n     * @param backgroundSize Background size\r\n     */\r\n    setBackgroundSize(backgroundSize: string) {\r\n        this.backgroundSize = backgroundSize;\r\n    }\r\n\r\n    /**\r\n     * Set background repeat for images that are not using <img> tag\r\n     * @param backgroundRepeat Background repeat\r\n     */\r\n    setBackgroundRepeat(backgroundRepeat: string) {\r\n        this.backgroundRepeat = backgroundRepeat;\r\n    }\r\n\r\n    /**\r\n     * Set fallback URL to use when image src is undefined or did not resolve.\r\n     * This image will not be cached. This should ideally be a locally saved image.\r\n     * @param fallbackUrl The remote or local URL of the image\r\n     */\r\n    setFallbackUrl(fallbackUrl: string) {\r\n        this.fallbackUrl = fallbackUrl;\r\n    }\r\n\r\n    /**\r\n     * Set the maximum number of allowed connections at the same time.\r\n     * @param concurrency\r\n     */\r\n    setConcurrency(concurrency: number) {\r\n        this.concurrency = concurrency;\r\n    }\r\n\r\n    /**\r\n     * Sets the maximum allowed cache size\r\n     * @param cacheSize Cache size in bytes\r\n     */\r\n    setMaximumCacheSize(cacheSize: number) {\r\n        this.maxCacheSize = cacheSize;\r\n    }\r\n\r\n    /**\r\n     * Sets the maximum allowed cache age\r\n     * @param cacheAge Maximum cache age in milliseconds\r\n     */\r\n    setMaximumCacheAge(cacheAge: number) {\r\n        this.maxCacheAge = cacheAge;\r\n    }\r\n\r\n    /**\r\n     * Set the return type of cached images\r\n     * @param imageReturnType The return type; either 'base64' or 'uri'\r\n     */\r\n    setImageReturnType(imageReturnType: 'base64' | 'uri') {\r\n        this.imageReturnType = imageReturnType;\r\n    }\r\n\r\n    /**\r\n     * Set the default spinner name\r\n     * @param name\r\n     */\r\n    setSpinnerName(name: string) {\r\n        this.spinnerName = name;\r\n    }\r\n\r\n    /**\r\n     * Set the default spinner color\r\n     * @param color\r\n     */\r\n    setSpinnerColor(color: string) {\r\n        this.spinnerColor = color;\r\n    }\r\n\r\n    /**\r\n     * Set headers options for the HttpClient transfers.\r\n     * @param headers\r\n     */\r\n    setHttpHeaders(headers: HttpHeaders) {\r\n        this.httpHeaders = headers;\r\n    }\r\n\r\n    /**\r\n     * Set options for the FileTransfer plugin\r\n     * @param options\r\n     * @deprecated FileTransfer plugin removed.\r\n     */\r\n    setFileTransferOptions(options: {\r\n        trustAllHosts: boolean;\r\n        [key: string]: any;\r\n    }) {\r\n        // do nothing, plugin deprecated.\r\n    }\r\n\r\n    /**\r\n     * Enable/Disable the save filename of cached images with extension.  Defaults to false.\r\n     * @param enable set to true to enable\r\n     */\r\n    setFileNameCachedWithExtension(enable: boolean) {\r\n        this.fileNameCachedWithExtension = enable;\r\n    }\r\n\r\n    /**\r\n     * Set fallback extension filename of cached images.  Defaults to '.jpg'.\r\n     * @param extension fallback extension (e.x .jpg)\r\n     */\r\n    setFallbackFileNameCachedExtension(extension: string) {\r\n        this.fallbackFileNameCachedExtension = extension;\r\n    }\r\n}\r\n","import {HttpClient} from '@angular/common/http';\r\nimport {Injectable} from '@angular/core';\r\nimport {File, FileEntry} from '@awesome-cordova-plugins/file/ngx';\r\nimport {WebView} from '@awesome-cordova-plugins/ionic-webview/ngx';\r\nimport {Platform} from '@ionic/angular';\r\nimport {fromEvent, Subject} from 'rxjs';\r\nimport {filter, first, take} from 'rxjs/operators';\r\nimport {ImageLoaderConfigService} from './image-loader-config.service';\r\n\r\ninterface IndexItem {\r\n    name: string;\r\n    modificationTime: Date;\r\n    size: number;\r\n}\r\n\r\ninterface QueueItem {\r\n    imageUrl: string;\r\n    resolve: Function;\r\n    reject: Function;\r\n}\r\n\r\ndeclare const Ionic: any;\r\n\r\nconst EXTENSIONS = ['jpg', 'png', 'jpeg', 'gif', 'svg', 'tiff'];\r\n\r\n@Injectable({\r\n    providedIn: 'root',\r\n})\r\nexport class ImageLoaderService {\r\n\r\n    /**\r\n     * Indicates if the cache service is ready.\r\n     * When the cache service isn't ready, images are loaded via browser instead.\r\n     */\r\n    private isCacheReady = false;\r\n    /**\r\n     * Indicates if this service is initialized.\r\n     * This service is initialized once all the setup is done.\r\n     */\r\n    private isInit = false;\r\n    private initPromiseResolve: Function;\r\n    private initPromise = new Promise<void>(resolve => this.initPromiseResolve = resolve);\r\n    private lockSubject = new Subject<boolean>();\r\n    private lock$ = this.lockSubject.asObservable();\r\n    /**\r\n     * Number of concurrent requests allowed\r\n     */\r\n    private concurrency = 5;\r\n    /**\r\n     * Queue items\r\n     */\r\n    private queue: QueueItem[] = [];\r\n    private processing = 0;\r\n    /**\r\n     * Fast accessible Object for currently processing items\r\n     */\r\n    private currentlyProcessing: { [index: string]: Promise<any> } = {};\r\n    private cacheIndex: IndexItem[] = [];\r\n    private currentCacheSize = 0;\r\n    private indexed = false;\r\n    private lockedCallsQueue: Function[] = [];\r\n\r\n    constructor(\r\n        private config: ImageLoaderConfigService,\r\n        private file: File,\r\n        private http: HttpClient,\r\n        private platform: Platform,\r\n        private webview: WebView,\r\n    ) {\r\n        if (!platform.is('cordova')) {\r\n            // we are running on a browser, or using livereload\r\n            // plugin will not function in this case\r\n            this.isInit = true;\r\n            this.throwWarning(\r\n                'You are running on a browser or using livereload, IonicImageLoader will not function, falling back to browser loading.',\r\n            );\r\n            this.initPromiseResolve();\r\n        } else {\r\n            fromEvent(document, 'deviceready')\r\n                .pipe(first())\r\n                .subscribe(res => {\r\n                    if (this.nativeAvailable) {\r\n                        this.initCache();\r\n                    } else {\r\n                        // we are running on a browser, or using livereload\r\n                        // plugin will not function in this case\r\n                        this.isInit = true;\r\n                        this.initPromiseResolve();\r\n                        this.throwWarning(\r\n                            'You are running on a browser or using livereload, IonicImageLoader will not function, falling back to browser loading.',\r\n                        );\r\n                    }\r\n                });\r\n        }\r\n    }\r\n\r\n    get nativeAvailable(): boolean {\r\n        return File.installed();\r\n    }\r\n\r\n    private get isCacheSpaceExceeded(): boolean {\r\n        return (\r\n            this.config.maxCacheSize > -1 &&\r\n            this.currentCacheSize > this.config.maxCacheSize\r\n        );\r\n    }\r\n\r\n    private get isWKWebView(): boolean {\r\n        return (\r\n            this.platform.is('ios') &&\r\n            (<any> window).webkit &&\r\n            (<any> window).webkit.messageHandlers\r\n        );\r\n    }\r\n\r\n    private get isIonicWKWebView(): boolean {\r\n        return (\r\n            //  Important: isWKWebview && isIonicWKWebview must be mutually excluse.\r\n            //  Otherwise the logic for copying to tmp under IOS will fail.\r\n            (this.platform.is('android') && this.webview) ||\r\n            (this.platform.is('android')) && (location.host === 'localhost:8080') ||\r\n            (<any> window).LiveReload);\r\n    }\r\n\r\n    private get isDevServer(): boolean {\r\n        return window['IonicDevServer'] !== undefined;\r\n    }\r\n\r\n    /**\r\n     * Check if we can process more items in the queue\r\n     */\r\n    private get canProcess(): boolean {\r\n        return this.queue.length > 0 && this.processing < this.concurrency;\r\n    }\r\n\r\n    ready(): Promise<void> {\r\n        return this.initPromise;\r\n    }\r\n\r\n    /**\r\n     * Preload an image\r\n     * @param imageUrl Image URL\r\n     * @returns returns a promise that resolves with the cached image URL\r\n     */\r\n    preload(imageUrl: string): Promise<string> {\r\n        return this.getImagePath(imageUrl);\r\n    }\r\n\r\n    getFileCacheDirectory() {\r\n        if (this.config.cacheDirectoryType === 'data') {\r\n            return this.file.dataDirectory;\r\n        } else if (this.config.cacheDirectoryType === 'external') {\r\n            return this.platform.is('android') ? this.file.externalDataDirectory : this.file.documentsDirectory;\r\n        }\r\n        return this.file.cacheDirectory;\r\n    }\r\n\r\n    /**\r\n     * Clears cache of a single image\r\n     * @param imageUrl Image URL\r\n     */\r\n    async clearImageCache(imageUrl: string) {\r\n        if (!this.platform.is('cordova')) {\r\n            return;\r\n        }\r\n\r\n        await this.ready();\r\n\r\n        this.runLocked(async () => {\r\n            const fileName = this.createFileName(imageUrl);\r\n            const route = this.getFileCacheDirectory() + this.config.cacheDirectoryName;\r\n            // pause any operations\r\n            this.isInit = false;\r\n\r\n            try {\r\n                await this.file.removeFile(route, fileName);\r\n\r\n                if (this.isWKWebView && !this.isIonicWKWebView) {\r\n                    await this.file.removeFile(this.file.tempDirectory + this.config.cacheDirectoryName, fileName);\r\n                }\r\n            } catch (err) {\r\n                this.throwError(err);\r\n            }\r\n\r\n            return this.initCache(true);\r\n        });\r\n    }\r\n\r\n    /**\r\n     * Clears the cache\r\n     */\r\n    async clearCache() {\r\n        if (!this.platform.is('cordova')) {\r\n            return;\r\n        }\r\n\r\n        await this.ready();\r\n\r\n        this.runLocked(async () => {\r\n            try {\r\n                await this.file.removeRecursively(this.getFileCacheDirectory(), this.config.cacheDirectoryName);\r\n\r\n                if (this.isWKWebView && !this.isIonicWKWebView) {\r\n                    // also clear the temp files\r\n                    try {\r\n                        this.file.removeRecursively(this.file.tempDirectory, this.config.cacheDirectoryName);\r\n                    } catch (err) {\r\n                        // Noop catch. Removing the tempDirectory might fail,\r\n                        // as it is not persistent.\r\n                    }\r\n                }\r\n            } catch (err) {\r\n                this.throwError(err);\r\n            }\r\n\r\n            return this.initCache(true);\r\n        });\r\n    }\r\n\r\n    /**\r\n     * Gets the filesystem path of an image.\r\n     * This will return the remote path if anything goes wrong or if the cache service isn't ready yet.\r\n     * @param imageUrl The remote URL of the image\r\n     * @returns Returns a promise that will always resolve with an image URL\r\n     */\r\n    async getImagePath(imageUrl: string): Promise<string> {\r\n        if (typeof imageUrl !== 'string' || imageUrl.length <= 0) {\r\n            throw new Error('The image url provided was empty or invalid.');\r\n        }\r\n\r\n        await this.ready();\r\n\r\n        if (!this.isCacheReady) {\r\n            this.throwWarning('The cache system is not running. Images will be loaded by your browser instead.');\r\n            return imageUrl;\r\n        }\r\n\r\n        if (this.isImageUrlRelative(imageUrl)) {\r\n            return imageUrl;\r\n        }\r\n\r\n        try {\r\n            return await this.getCachedImagePath(imageUrl);\r\n        } catch (err) {\r\n            // image doesn't exist in cache, lets fetch it and save it\r\n            return this.addItemToQueue(imageUrl);\r\n        }\r\n    }\r\n\r\n    private async processLockedQueue() {\r\n        if (await this.getLockedState()) {\r\n            return;\r\n        }\r\n\r\n        if (this.lockedCallsQueue.length > 0) {\r\n            await this.setLockedState(true);\r\n\r\n            try {\r\n                await this.lockedCallsQueue.slice(0, 1)[0]();\r\n            } catch (err) {\r\n                console.log('Error running locked function: ', err);\r\n            }\r\n\r\n            await this.setLockedState(false);\r\n            return this.processLockedQueue();\r\n        }\r\n    }\r\n\r\n    private getLockedState(): Promise<boolean> {\r\n        return this.lock$\r\n            .pipe(take(1))\r\n            .toPromise();\r\n    }\r\n\r\n    private awaitUnlocked(): Promise<boolean> {\r\n        return this.lock$\r\n            .pipe(\r\n                filter(locked => !!locked),\r\n                take(1),\r\n            )\r\n            .toPromise();\r\n    }\r\n\r\n    private async setLockedState(locked: boolean) {\r\n        this.lockSubject.next(locked);\r\n    }\r\n\r\n    private runLocked(fn: Function) {\r\n        this.lockedCallsQueue.push(fn);\r\n        this.processLockedQueue();\r\n    }\r\n\r\n    /**\r\n     * Returns if an imageUrl is an relative path\r\n     * @param imageUrl\r\n     */\r\n    private isImageUrlRelative(imageUrl: string) {\r\n        return !/^(https?|file):\\/\\/\\/?/i.test(imageUrl);\r\n    }\r\n\r\n    /**\r\n     * Add an item to the queue\r\n     * @param imageUrl\r\n     * @param resolve\r\n     * @param reject\r\n     */\r\n    private addItemToQueue(imageUrl: string, resolve?, reject?): void | Promise<any> {\r\n        let p: void | Promise<any>;\r\n\r\n        if (!resolve && !reject) {\r\n            p = new Promise<any>((res, rej) => {\r\n                resolve = res;\r\n                reject = rej;\r\n            });\r\n        } else {\r\n            resolve = resolve || (() => {\r\n            });\r\n            reject = reject || (() => {\r\n            });\r\n        }\r\n\r\n        this.queue.push({\r\n            imageUrl,\r\n            resolve,\r\n            reject,\r\n        });\r\n\r\n        this.processQueue();\r\n\r\n        return p;\r\n    }\r\n\r\n    /**\r\n     * Processes one item from the queue\r\n     */\r\n    private async processQueue() {\r\n        // make sure we can process items first\r\n        if (!this.canProcess) {\r\n            return;\r\n        }\r\n\r\n        // increase the processing number\r\n        this.processing++;\r\n\r\n        // take the first item from queue\r\n        const currentItem: QueueItem = this.queue.splice(0, 1)[0];\r\n\r\n        // function to call when done processing this item\r\n        // this will reduce the processing number\r\n        // then will execute this function again to process any remaining items\r\n        const done = () => {\r\n            this.processing--;\r\n            this.processQueue();\r\n\r\n            // only delete if it's the last/unique occurrence in the queue\r\n            if (this.currentlyProcessing[currentItem.imageUrl] !== undefined && !this.currentlyInQueue(currentItem.imageUrl)) {\r\n                delete this.currentlyProcessing[currentItem.imageUrl];\r\n            }\r\n        };\r\n\r\n        const error = (e) => {\r\n            currentItem.reject();\r\n            this.throwError(e);\r\n            done();\r\n        };\r\n\r\n        if (this.currentlyProcessing[currentItem.imageUrl] !== undefined) {\r\n            try {\r\n                // Prevented same Image from loading at the same time\r\n                await this.currentlyProcessing[currentItem.imageUrl];\r\n                const localUrl = await this.getCachedImagePath(currentItem.imageUrl);\r\n                currentItem.resolve(localUrl);\r\n                done();\r\n            } catch (err) {\r\n                error(err);\r\n            }\r\n            return;\r\n        }\r\n\r\n        this.currentlyProcessing[currentItem.imageUrl] = (async () => {\r\n            // process more items concurrently if we can\r\n            if (this.canProcess) {\r\n                this.processQueue();\r\n            }\r\n\r\n            const localDir = this.getFileCacheDirectory() + this.config.cacheDirectoryName + '/';\r\n            const fileName = this.createFileName(currentItem.imageUrl);\r\n\r\n            try {\r\n                const data: Blob = await this.http.get(currentItem.imageUrl, {\r\n                    responseType: 'blob',\r\n                    headers: this.config.httpHeaders,\r\n                }).toPromise();\r\n\r\n                const file = await this.file.writeFile(localDir, fileName, data, {replace: true}) as FileEntry;\r\n\r\n                if (this.isCacheSpaceExceeded) {\r\n                    this.maintainCacheSize();\r\n                }\r\n\r\n                await this.addFileToIndex(file);\r\n                const localUrl = await this.getCachedImagePath(currentItem.imageUrl);\r\n                currentItem.resolve(localUrl);\r\n                done();\r\n                this.maintainCacheSize();\r\n            } catch (err) {\r\n                error(err);\r\n                throw err;\r\n            }\r\n        })();\r\n\r\n    }\r\n\r\n    /**\r\n     * Search if the url is currently in the queue\r\n     * @param imageUrl Image url to search\r\n     */\r\n    private currentlyInQueue(imageUrl: string) {\r\n        return this.queue.some(item => item.imageUrl === imageUrl);\r\n    }\r\n\r\n    /**\r\n     * Initialize the cache service\r\n     * @param [replace] Whether to replace the cache directory if it already exists\r\n     */\r\n    private async initCache(replace?: boolean) {\r\n        this.concurrency = this.config.concurrency;\r\n\r\n        // create cache directories if they do not exist\r\n        try {\r\n            await this.createCacheDirectory(replace);\r\n            await this.indexCache();\r\n            this.isCacheReady = true;\r\n        } catch (err) {\r\n            this.throwError(err);\r\n        }\r\n\r\n        this.isInit = true;\r\n        this.initPromiseResolve();\r\n    }\r\n\r\n    /**\r\n     * Adds a file to index.\r\n     * Also deletes any files if they are older than the set maximum cache age.\r\n     * @param file FileEntry to index\r\n     */\r\n    private async addFileToIndex(file: FileEntry): Promise<any> {\r\n        const metadata = await new Promise<any>((resolve, reject) => file.getMetadata(resolve, reject));\r\n\r\n        if (\r\n            this.config.maxCacheAge > -1 &&\r\n            Date.now() - metadata.modificationTime.getTime() >\r\n            this.config.maxCacheAge\r\n        ) {\r\n            // file age exceeds maximum cache age\r\n            return this.removeFile(file.name);\r\n        } else {\r\n            // file age doesn't exceed maximum cache age, or maximum cache age isn't set\r\n            this.currentCacheSize += metadata.size;\r\n\r\n            // add item to index\r\n            this.cacheIndex.push({\r\n                name: file.name,\r\n                modificationTime: metadata.modificationTime,\r\n                size: metadata.size,\r\n            });\r\n        }\r\n    }\r\n\r\n    /**\r\n     * Indexes the cache if necessary\r\n     */\r\n    private async indexCache(): Promise<void> {\r\n        this.cacheIndex = [];\r\n\r\n        try {\r\n            const files = await this.file.listDir(this.getFileCacheDirectory(), this.config.cacheDirectoryName);\r\n            await Promise.all(files.map(this.addFileToIndex.bind(this)));\r\n            // Sort items by date. Most recent to oldest.\r\n            this.cacheIndex = this.cacheIndex.sort(\r\n                (a: IndexItem, b: IndexItem): number => (a > b ? -1 : a < b ? 1 : 0),\r\n            );\r\n            this.indexed = true;\r\n        } catch (err) {\r\n            this.throwError(err);\r\n        }\r\n    }\r\n\r\n    /**\r\n     * This method runs every time a new file is added.\r\n     * It checks the cache size and ensures that it doesn't exceed the maximum cache size set in the config.\r\n     * If the limit is reached, it will delete old images to create free space.\r\n     */\r\n    private async maintainCacheSize() {\r\n        if (this.config.maxCacheSize > -1 && this.indexed) {\r\n            const maintain = async () => {\r\n                if (this.currentCacheSize > this.config.maxCacheSize) {\r\n                    // grab the first item in index since it's the oldest one\r\n                    const file: IndexItem = this.cacheIndex.splice(0, 1)[0];\r\n\r\n                    if (typeof file === 'undefined') {\r\n                        return maintain();\r\n                    }\r\n\r\n                    // delete the file then process next file if necessary\r\n                    try {\r\n                        await this.removeFile(file.name);\r\n                    } catch (err) {\r\n                        // ignore errors, nothing we can do about it\r\n                    }\r\n\r\n                    this.currentCacheSize -= file.size;\r\n                    return maintain();\r\n                }\r\n            };\r\n\r\n            return maintain();\r\n        }\r\n    }\r\n\r\n    /**\r\n     * Remove a file\r\n     * @param file The name of the file to remove\r\n     */\r\n    private async removeFile(file: string): Promise<any> {\r\n        await this.file.removeFile(this.getFileCacheDirectory() + this.config.cacheDirectoryName, file);\r\n\r\n        if (this.isWKWebView && !this.isIonicWKWebView) {\r\n            try {\r\n                return this.file.removeFile(this.file.tempDirectory + this.config.cacheDirectoryName, file);\r\n            } catch (err) {\r\n                // Noop catch. Removing the files from tempDirectory might fail, as it is not persistent.\r\n            }\r\n        }\r\n    }\r\n\r\n    /**\r\n     * Get the local path of a previously cached image if exists\r\n     * @param url The remote URL of the image\r\n     * @returns Returns a promise that resolves with the local path if exists, or rejects if doesn't exist\r\n     */\r\n    private async getCachedImagePath(url: string): Promise<string> {\r\n        await this.ready();\r\n\r\n        if (!this.isCacheReady) {\r\n            throw new Error('Cache is not ready');\r\n        }\r\n\r\n        // if we're running with livereload, ignore cache and call the resource from it's URL\r\n        if (this.isDevServer) {\r\n            return url;\r\n        }\r\n\r\n        // get file name\r\n        const fileName = this.createFileName(url);\r\n\r\n        // get full path\r\n        const dirPath = this.getFileCacheDirectory() + this.config.cacheDirectoryName,\r\n            tempDirPath = this.file.tempDirectory + this.config.cacheDirectoryName;\r\n\r\n        try {\r\n            // check if exists\r\n            const fileEntry = await this.file.resolveLocalFilesystemUrl(dirPath + '/' + fileName) as FileEntry;\r\n\r\n            // file exists in cache\r\n            if (this.config.imageReturnType === 'base64') {\r\n                // read the file as data url and return the base64 string.\r\n                // should always be successful as the existence of the file\r\n                // is already ensured\r\n                const base64: string = await this.file.readAsDataURL(dirPath, fileName);\r\n                return base64.replace('data:null', 'data:*/*');\r\n            } else if (this.config.imageReturnType !== 'uri') {\r\n                return;\r\n            }\r\n\r\n            // now check if iOS device & using WKWebView Engine.\r\n            // in this case only the tempDirectory is accessible,\r\n            // therefore the file needs to be copied into that directory first!\r\n            if (this.isIonicWKWebView) {\r\n                return this.normalizeUrl(fileEntry);\r\n            }\r\n\r\n            if (!this.isWKWebView) {\r\n                // return native path\r\n                return fileEntry.nativeURL;\r\n            }\r\n\r\n            // check if file already exists in temp directory\r\n            try {\r\n                const tempFileEntry = await this.file.resolveLocalFilesystemUrl(tempDirPath + '/' + fileName) as FileEntry;\r\n                // file exists in temp directory\r\n                // return native path\r\n                return this.normalizeUrl(tempFileEntry);\r\n            } catch (err) {\r\n                // file does not yet exist in the temp directory.\r\n                // copy it!\r\n                const tempFileEntry = await this.file\r\n                    .copyFile(dirPath, fileName, tempDirPath, fileName) as FileEntry;\r\n\r\n                // now the file exists in the temp directory\r\n                // return native path\r\n                return this.normalizeUrl(tempFileEntry);\r\n            }\r\n        } catch (err) {\r\n            throw new Error('File does not exist');\r\n        }\r\n    }\r\n\r\n    /**\r\n     * Normalizes the image uri to a version that can be loaded in the webview\r\n     * @param fileEntry the FileEntry of the image file\r\n     * @returns the normalized Url\r\n     */\r\n\r\n    private normalizeUrl(fileEntry: FileEntry): string {\r\n        // Use Ionic normalizeUrl to generate the right URL for Ionic WKWebView\r\n        if (Ionic && typeof Ionic.normalizeURL === 'function') {\r\n            return Ionic.normalizeURL(fileEntry.nativeURL);\r\n        }\r\n        // use new webview function to do the trick\r\n        if (this.webview) {\r\n            return this.webview.convertFileSrc(fileEntry.nativeURL);\r\n        }\r\n        return fileEntry.nativeURL;\r\n    }\r\n\r\n    /**\r\n     * Throws a console error if debug mode is enabled\r\n     * @param args Error message\r\n     */\r\n    private throwError(...args: any[]) {\r\n        if (this.config.debugMode) {\r\n            args.unshift('ImageLoader Error: ');\r\n            console.error.apply(console, args);\r\n        }\r\n    }\r\n\r\n    /**\r\n     * Throws a console warning if debug mode is enabled\r\n     * @param args Error message\r\n     */\r\n    private throwWarning(...args: any[]) {\r\n        if (this.config.debugMode) {\r\n            args.unshift('ImageLoader Warning: ');\r\n            console.warn.apply(console, args);\r\n        }\r\n    }\r\n\r\n    /**\r\n     * Check if the cache directory exists\r\n     * @param directory The directory to check. Either this.file.tempDirectory or this.getFileCacheDirectory()\r\n     * @returns Returns a promise that resolves if exists, and rejects if it doesn't\r\n     */\r\n    private cacheDirectoryExists(directory: string): Promise<boolean> {\r\n        return this.file.checkDir(directory, this.config.cacheDirectoryName);\r\n    }\r\n\r\n    /**\r\n     * Create the cache directories\r\n     * @param replace override directory if exists\r\n     * @returns Returns a promise that resolves if the directories were created, and rejects on error\r\n     */\r\n    private createCacheDirectory(replace: boolean = false): Promise<any> {\r\n        let cacheDirectoryPromise: Promise<any>, tempDirectoryPromise: Promise<any>;\r\n\r\n        if (replace) {\r\n            // create or replace the cache directory\r\n            cacheDirectoryPromise = this.file.createDir(this.getFileCacheDirectory(), this.config.cacheDirectoryName, replace);\r\n        } else {\r\n            // check if the cache directory exists.\r\n            // if it does not exist create it!\r\n            cacheDirectoryPromise = this.cacheDirectoryExists(this.getFileCacheDirectory())\r\n                .catch(() => this.file.createDir(this.getFileCacheDirectory(), this.config.cacheDirectoryName, false));\r\n        }\r\n\r\n        if (this.isWKWebView && !this.isIonicWKWebView) {\r\n            if (replace) {\r\n                // create or replace the temp directory\r\n                tempDirectoryPromise = this.file.createDir(\r\n                    this.file.tempDirectory,\r\n                    this.config.cacheDirectoryName,\r\n                    replace,\r\n                );\r\n            } else {\r\n                // check if the temp directory exists.\r\n                // if it does not exist create it!\r\n                tempDirectoryPromise = this.cacheDirectoryExists(\r\n                    this.file.tempDirectory,\r\n                ).catch(() =>\r\n                    this.file.createDir(\r\n                        this.file.tempDirectory,\r\n                        this.config.cacheDirectoryName,\r\n                        false,\r\n                    ),\r\n                );\r\n            }\r\n        } else {\r\n            tempDirectoryPromise = Promise.resolve();\r\n        }\r\n\r\n        return Promise.all([cacheDirectoryPromise, tempDirectoryPromise]);\r\n    }\r\n\r\n    /**\r\n     * Creates a unique file name out of the URL\r\n     * @param url URL of the file\r\n     * @returns Unique file name\r\n     */\r\n    private createFileName(url: string): string {\r\n        // hash the url to get a unique file name\r\n        return (\r\n            this.hashString(url).toString() +\r\n            (this.config.fileNameCachedWithExtension\r\n                ? this.getExtensionFromUrl(url)\r\n                : '')\r\n        );\r\n    }\r\n\r\n    /**\r\n     * Converts a string to a unique 32-bit int\r\n     * @param string string to hash\r\n     * @returns 32-bit int\r\n     */\r\n    private hashString(string: string): number {\r\n        let hash = 0,\r\n            char;\r\n        if (string.length === 0) {\r\n            return hash;\r\n        }\r\n        for (let i = 0; i < string.length; i++) {\r\n            char = string.charCodeAt(i);\r\n            // tslint:disable-next-line\r\n            hash = (hash << 5) - hash + char;\r\n            // tslint:disable-next-line\r\n            hash = hash & hash;\r\n        }\r\n        return hash;\r\n    }\r\n\r\n    /**\r\n     * Extract extension from filename or url\r\n     *\r\n     * @param url\r\n     * @returns\r\n     *\r\n     * Not always will url's contain a valid image extention. We'll check if any valid extention is supplied.\r\n     * If not, we will use the default.\r\n     */\r\n    private getExtensionFromUrl(url: string): string {\r\n        const urlWitoutParams = url.split(/\\#|\\?/)[0];\r\n        const ext: string = (urlWitoutParams.substr((~-urlWitoutParams.lastIndexOf('.') >>> 0) + 1) || '').toLowerCase();\r\n\r\n        return (\r\n            EXTENSIONS.indexOf(ext) >= 0 ? ext : this.config.fallbackFileNameCachedExtension\r\n        );\r\n    }\r\n}\r\n","import { Component, ElementRef, EventEmitter, Input, OnInit, Output, Renderer2 } from '@angular/core';\r\nimport { ImageLoaderConfigService } from './services/image-loader-config.service';\r\nimport { ImageLoaderService } from './services/image-loader.service';\r\n\r\nconst propMap: any = {\r\n  display: 'display',\r\n  height: 'height',\r\n  width: 'width',\r\n  backgroundSize: 'background-size',\r\n  backgroundRepeat: 'background-repeat',\r\n};\r\n\r\nexport interface ImageAttribute {\r\n  element: string;\r\n  value: string;\r\n}\r\n\r\n@Component({\r\n  selector: 'img-loader',\r\n  template: `\r\n    <ion-spinner\r\n        *ngIf=\"spinner && isLoading && !fallbackAsPlaceholder\"\r\n        [name]=\"spinnerName\"\r\n        [color]=\"spinnerColor\"\r\n    ></ion-spinner>\r\n    <ng-content></ng-content>\r\n  `,\r\n  styles: [\r\n    'ion-spinner { float: none; margin-left: auto; margin-right: auto; display: block; }',\r\n  ],\r\n})\r\nexport class IonicImageLoaderComponent implements OnInit {\r\n  /**\r\n   * Fallback URL to load when the image url fails to load or does not exist.\r\n   */\r\n  @Input() fallbackUrl: string = this.config.fallbackUrl;\r\n  /**\r\n   * Whether to show a spinner while the image loads\r\n   */\r\n  @Input() spinner: boolean = this.config.spinnerEnabled;\r\n  /**\r\n   * Whether to show the fallback image instead of a spinner while the image loads\r\n   */\r\n\r\n  @Input() fallbackAsPlaceholder: boolean = this.config.fallbackAsPlaceholder;\r\n  /**\r\n   * Attributes to pass through to img tag if _useImg == true\r\n   */\r\n  @Input() imgAttributes: ImageAttribute[] = [];\r\n  /**\r\n   * Enable/Disable caching\r\n   */\r\n  @Input() cache = true;\r\n  /**\r\n   * Width of the image. This will be ignored if using useImg.\r\n   */\r\n  @Input() width: string = this.config.width;\r\n  /**\r\n   * Height of the image. This will be ignored if using useImg.\r\n   */\r\n  @Input() height: string = this.config.height;\r\n  /**\r\n   * Display type of the image. This will be ignored if using useImg.\r\n   */\r\n  @Input() display: string = this.config.display;\r\n  /**\r\n   * Background size. This will be ignored if using useImg.\r\n   */\r\n  @Input() backgroundSize: string = this.config.backgroundSize;\r\n  /**\r\n   * Background repeat. This will be ignored if using useImg.\r\n   */\r\n  @Input() backgroundRepeat: string = this.config.backgroundRepeat;\r\n  /**\r\n   * Name of the spinner\r\n   */\r\n  @Input() spinnerName: string = this.config.spinnerName;\r\n  /**\r\n   * Color of the spinner\r\n   */\r\n  @Input() spinnerColor: string = this.config.spinnerColor;\r\n  /**\r\n   * Notify on image load..\r\n   */\r\n  @Output()\r\n  load: EventEmitter<IonicImageLoaderComponent> = new EventEmitter<IonicImageLoaderComponent>();\r\n  /**\r\n   * Indicates if the image is still loading\r\n   */\r\n  isLoading = true;\r\n  element: HTMLElement;\r\n\r\n  constructor(\r\n      private _element: ElementRef,\r\n      private renderer: Renderer2,\r\n      private imageLoader: ImageLoaderService,\r\n      private config: ImageLoaderConfigService,\r\n  ) {\r\n  }\r\n\r\n  private _useImg: boolean = this.config.useImg;\r\n\r\n  /**\r\n   * Use <img> tag\r\n   */\r\n  @Input()\r\n  set useImg(val: boolean) {\r\n    this._useImg = val !== false;\r\n  }\r\n\r\n  /**\r\n   * Convenience attribute to disable caching\r\n   */\r\n  @Input()\r\n  set noCache(val: boolean) {\r\n    this.cache = val !== false;\r\n  }\r\n\r\n  private _src: string;\r\n\r\n  get src(): string {\r\n    return this._src;\r\n  }\r\n\r\n  /**\r\n   * The URL of the image to load.\r\n   */\r\n  @Input()\r\n  set src(imageUrl: string) {\r\n    this._src = this.processImageUrl(imageUrl);\r\n    this.updateImage(this._src);\r\n  }\r\n\r\n  ngOnInit(): void {\r\n    if (this.fallbackAsPlaceholder && this.fallbackUrl) {\r\n      this.setImage(this.fallbackUrl, false);\r\n    }\r\n\r\n    if (!this.src) {\r\n      // image url was not passed\r\n      // this can happen when [src] is set to a variable that turned out to be undefined\r\n      // one example could be a list of users with their profile pictures\r\n      // in this case, it would be useful to use the fallback image instead\r\n      // if fallbackUrl was used as placeholder we do not need to set it again\r\n      if (!this.fallbackAsPlaceholder && this.fallbackUrl) {\r\n        // we're not going to cache the fallback image since it should be locally saved\r\n        this.setImage(this.fallbackUrl);\r\n      } else {\r\n        this.isLoading = false;\r\n      }\r\n    }\r\n  }\r\n\r\n  private updateImage(imageUrl: string) {\r\n    this.imageLoader\r\n        .getImagePath(imageUrl)\r\n        .then((url: string) => this.setImage(url))\r\n        .catch((error: any) => this.setImage(this.fallbackUrl || imageUrl));\r\n  }\r\n\r\n  /**\r\n   * Gets the image URL to be loaded and disables caching if necessary\r\n   */\r\n  private processImageUrl(imageUrl: string): string {\r\n    if (this.cache === false) {\r\n      // need to disable caching\r\n\r\n      if (imageUrl.indexOf('?') < 0) {\r\n        // add ? if doesn't exists\r\n        imageUrl += '?';\r\n      } else {\r\n        imageUrl += '&';\r\n      }\r\n      // append timestamp at the end to make URL unique\r\n      imageUrl += 'cache_buster=' + Date.now();\r\n    }\r\n\r\n    return imageUrl;\r\n  }\r\n\r\n  /**\r\n   * Set the image to be displayed\r\n   * @param imageUrl image src\r\n   * @param stopLoading set to true to mark the image as loaded\r\n   */\r\n  private setImage(imageUrl: string, stopLoading: boolean = true): void {\r\n    this.isLoading = !stopLoading;\r\n\r\n    if (this._useImg) {\r\n      // Using <img> tag\r\n      if (!this.element) {\r\n        // create img element if we dont have one\r\n        this.element = this.renderer.createElement('img');\r\n        this.renderer.appendChild(this._element.nativeElement, this.element);\r\n      }\r\n\r\n      // set it's src\r\n      this.renderer.setAttribute(this.element, 'src', imageUrl);\r\n\r\n      // if imgAttributes are defined, add them to our img element\r\n      this.imgAttributes.forEach((attribute) => {\r\n        this.renderer.setAttribute(this.element, attribute.element, attribute.value);\r\n      });\r\n      if (this.fallbackUrl && !this.imageLoader.nativeAvailable) {\r\n        this.renderer.listen(this.element, 'error', () =>\r\n            this.renderer.setAttribute(this.element, 'src', this.fallbackUrl),\r\n        );\r\n      }\r\n    } else {\r\n      // Not using <img> tag\r\n\r\n      this.element = this._element.nativeElement;\r\n\r\n      for (const prop in propMap) {\r\n        if (this[prop]) {\r\n          this.renderer.setStyle(this.element, propMap[prop], this[prop]);\r\n        }\r\n      }\r\n      this.renderer.setStyle(\r\n          this.element,\r\n          'background-image',\r\n          `url(\"${imageUrl || this.fallbackUrl}\")`,\r\n      );\r\n    }\r\n    if (stopLoading) {\r\n      this.load.emit(this);\r\n    }\r\n  }\r\n}\r\n","import {NgModule} from '@angular/core';\r\nimport {CommonModule} from '@angular/common';\r\nimport {HttpClientModule} from '@angular/common/http';\r\nimport {IonicModule} from '@ionic/angular';\r\nimport {File} from '@awesome-cordova-plugins/file/ngx';\r\n\r\nimport {IonicImageLoaderComponent} from './ionic-image-loader.component';\r\nimport {ImageLoaderConfigService} from './services/image-loader-config.service';\r\nimport {ImageLoaderService} from './services/image-loader.service';\r\n\r\n\r\n@NgModule({\r\n    imports: [\r\n        IonicModule,\r\n        HttpClientModule,\r\n        CommonModule\r\n    ],\r\n    declarations: [\r\n        IonicImageLoaderComponent\r\n    ],\r\n    exports: [\r\n        IonicImageLoaderComponent\r\n    ],\r\n    providers: [\r\n        File,\r\n        ImageLoaderConfigService,\r\n        ImageLoaderService\r\n    ]\r\n})\r\nexport class IonicImageLoaderModule {\r\n}\r\n","/*\n * Public API Surface of ionic-image-loader-v7\n */\n\nexport * from './lib/services/image-loader.service';\nexport * from './lib/services/image-loader-config.service';\nexport * from './lib/ionic-image-loader.component';\nexport * from './lib/ionic-image-loader.module';\n","/**\n * Generated bundle index. Do not edit.\n */\n\nexport * from 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