Timothy Farrell
ad49f2a687
Removing an image from an album does not delete it. Deleteing an images does not remove its link from the album.
49 lines
1.4 KiB
JavaScript
49 lines
1.4 KiB
JavaScript
import { readAsArrayBuffer } from 'pouchdb-binary-utils';
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import { isObject } from './comparators';
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export function bufferToHexString(buffer) {
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const hexCodes = [];
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const view = new DataView(buffer);
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for (let i = 0; i < view.byteLength; i += 4) {
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// Using getUint32 reduces the number of iterations needed (we process 4 bytes each time)
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const value = view.getUint32(i);
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// toString(16) will give the hex representation of the number without padding
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// We use concatenation and slice for padding
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hexCodes.push(`00000000${value.toString(16)}`.slice(-8));
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}
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// Join all the hex strings into one
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return hexCodes.join('');
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}
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export function blobToArrayBuffer(blob) {
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return new Promise(resolve => readAsArrayBuffer(blob, resolve));
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}
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export const arrayHashWrapper = hash => arr => (Array.isArray(arr) ? arr.map(hash).join('?') : arr);
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export function pouchDocHash(d) {
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return isObject(d) ? `${d._id}:${d._rev}` : d;
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}
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export const pouchDocArrayHash = arrayHashWrapper(pouchDocHash);
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export function deepAssign(to, ...rest) {
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for (let src of rest) {
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for (let prop in src) {
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const value = src[prop];
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if (typeof value === 'object' && !Array.isArray(value)) {
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to[prop] = deepAssign(to[prop] || {}, value);
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} else if (value === undefined && to[prop] !== undefined) {
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delete to[prop];
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} else {
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to[prop] = value;
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}
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}
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}
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return to;
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}
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export const pick = id => doc => doc[id];
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