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/*
* BSD 3-Clause License
*
* Copyright (c) 2017, MapCreator
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import {isParentOf} from './utils/reflection';
import Maps4News from './Maps4News';
import ResourceBase from './crud/base/ResourceBase';
import ApiError from './errors/ApiError';
import ValidationError from './errors/ValidationError';
/**
* Image resource handler
* @protected
*/
export default class ImageHandler {
/**
* @param {Maps4News} api - Api instance
* @param {ResourceBase} target - Instance of target item
*/
constructor(api, target) {
if (!isParentOf(Maps4News, api)) {
throw new TypeError('Expected api to be of type Maps4News');
}
if (!isParentOf(ResourceBase, target)) {
throw new TypeError('Expected target to be of type ResourceBase');
}
this._api = api;
this._target = target;
}
/**
* Get api instance
* @returns {Maps4News} - Api instance
*/
get api() {
return this._api;
}
/**
* Resource url, can be used in an image tag
* @returns {string} - Resource url
*/
get url() {
return `${this._target.url}/image`;
}
/**
* Delete image
* @returns {Promise} - Resolves with an empty {@link Object} and rejects with {@link ApiError}
*/
delete() {
return this._api.request(this.url, 'DELETE');
}
/**
* Get image base64 representation
* @returns {Promise} - Resolves with a {@link String} containing a base64 representation of the image and rejects with {@link ApiError}
* @todo nodejs compatibility
*/
download() {
return new Promise((resolve, reject) => {
this._api.request(this.url, 'GET', {}, {}, 'arraybuffer')
.catch(reject)
.then(data => {
const blob = new Blob([data], {type: 'image'});
// noinspection JSUnresolvedFunction
const url = (window.URL || window.webkitURL).createObjectURL(blob);
resolve(url);
});
});
}
/**
* Upload new image
* @param {File} image - Image file
* @returns {Promise} - Resolves with an empty {@link Object} and rejects with {@link ApiError}
* @todo refactor
*/
upload(image) {
if (!isParentOf(File, image)) {
throw new TypeError('Expected image to be of type File');
}
return new Promise((resolve, reject) => {
const formData = new FormData();
formData.append('image', image);
const request = new XMLHttpRequest();
request.open('POST', this.url, true);
request.setRequestHeader('Authorization', this.api.auth.token.toString());
request.setRequestHeader('Accept', 'application/json');
request.onreadystatechange = () => {
if (request.readyState !== XMLHttpRequest.DONE) {
return;
}
try {
const response = JSON.parse(request.responseText);
if (!response.success) {
const err = response.error;
if (!err.validation_errors) {
reject(new ApiError(err.type, err.message, request.status));
} else {
reject(new ValidationError(err.type, err.message, request.status, err.validation_errors));
}
} else {
// Return an empty object if no data has been sent
// instead of returning undefined.
resolve(response.data || {});
}
} catch (ignore) {
reject(new ApiError('ResponseException', 'The server returned an invalid response', request.status));
}
};
request.send(formData);
});
}
}