mirror of https://github.com/ascribe/onion.git
56 lines
1.8 KiB
JavaScript
56 lines
1.8 KiB
JavaScript
'use strict';
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import { sanitize, intersectLists } from './general_utils';
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export function getAvailableAcls(editions, filterFn) {
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let availableAcls = [];
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if (!editions || editions.constructor !== Array) {
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return [];
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}
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// if you copy a javascript array of objects using slice, then
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// the object reference is still there.
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// Therefore we need to do this ugly copying
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let editionsCopy = JSON.parse(JSON.stringify(editions));
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// sanitize object acls in editions
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// so that they don't contain any falsy key-value pairs anymore
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editionsCopy = editionsCopy.map((edition) => {
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// acl also returns the piece id and the edition id
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// therefore, we're going to remove it
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edition.acl.edition = false;
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edition.acl.piece = false;
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edition.acl = sanitize(edition.acl, (val) => !val);
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edition.acl = Object.keys(edition.acl);
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// additionally, the user can specify a filter function for
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// an acl array
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if(typeof filterFn === 'function') {
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edition.acl = edition.acl.filter(filterFn);
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}
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return edition;
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});
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// If no edition has been selected, availableActions is empty
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// If only one edition has been selected, its actions are available
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// If more than one editions have been selected, intersect all their acl properties
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if (editionsCopy.length >= 1) {
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availableAcls = editionsCopy[0].acl;
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if (editionsCopy.length >= 2) {
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for (let i = 1; i < editionsCopy.length; i++) {
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availableAcls = intersectLists(availableAcls, editionsCopy[i].acl);
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}
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}
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}
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// convert acls back to key-value object
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let availableAclsObj = {};
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for (let i = 0; i < availableAcls.length; i++) {
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availableAclsObj[availableAcls[i]] = true;
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}
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return availableAclsObj;
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}
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