fctrlx-angular-file-reader/esm2015/lib/services/Base.js

Angular library that helps convert file (from input[type=file]) to base64/arrayBuffer/text using FileReader API.

/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingOverride,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
import { Observable } from 'rxjs';
export class Base {
    /**
     * @param {?} returnType
     */
    constructor(returnType) {
        this.TYPE_PROMISE = 'PROMISE';
        this.TYPE_SUBSCRIBER = 'OBSERVABLE';
        this.returnType = returnType;
    }
    /**
     * @param {?} file
     * @return {?}
     */
    toBase64(file) {
        /** @type {?} */
        const reader = new FileReader();
        reader.readAsDataURL(file);
        return this.response(reader);
    }
    /**
     * @param {?} file
     * @return {?}
     */
    toText(file) {
        /** @type {?} */
        const reader = new FileReader();
        reader.readAsText(file);
        return this.response(reader);
    }
    /**
     * @param {?} file
     * @return {?}
     */
    toArrBuf(file) {
        /** @type {?} */
        const reader = new FileReader();
        reader.readAsArrayBuffer(file);
        return this.response(reader);
    }
    /**
     * @param {?} reader
     * @return {?}
     */
    response(reader) {
        /** @type {?} */
        let response;
        if (this.returnType === this.TYPE_SUBSCRIBER) {
            response = Observable.create((/**
             * @param {?} observer
             * @return {?}
             */
            (observer) => {
                reader.onloadend = (/**
                 * @return {?}
                 */
                () => {
                    observer.next((/** @type {?} */ (reader.result)));
                    observer.complete();
                });
                reader.onerror = (/**
                 * @param {?} error
                 * @return {?}
                 */
                (error) => {
                    observer.next((/** @type {?} */ (error)));
                    observer.complete();
                });
            }));
        }
        else if (this.returnType === this.TYPE_PROMISE) {
            response = new Promise((/**
             * @param {?} resolve
             * @param {?} reject
             * @return {?}
             */
            (resolve, reject) => {
                reader.onloadend = (/**
                 * @return {?}
                 */
                () => resolve((/** @type {?} */ (reader.result))));
                reader.onerror = (/**
                 * @param {?} error
                 * @return {?}
                 */
                error => reject((/** @type {?} */ (error))));
            }));
        }
        return response;
    }
}
if (false) {
    /**
     * @type {?}
     * @private
     */
    Base.prototype.TYPE_PROMISE;
    /**
     * @type {?}
     * @private
     */
    Base.prototype.TYPE_SUBSCRIBER;
    /**
     * @type {?}
     * @private
     */
    Base.prototype.returnType;
}
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