opds-web-client
Version:
79 lines (78 loc) • 2.96 kB
JavaScript
;
function newCollectionIsOldCollection(newCollection, oldCollection) {
return oldCollection && (newCollection.url === oldCollection.url ||
newCollection.id === oldCollection.id);
}
function newCollectionIsOldRoot(newCollection, oldCollection) {
return oldCollection &&
oldCollection.catalogRootLink &&
oldCollection.catalogRootLink.url &&
oldCollection.catalogRootLink.url === newCollection.url;
}
function newCollectionIsNewRoot(newCollection) {
return newCollection.catalogRootLink &&
newCollection.catalogRootLink.url === newCollection.url;
}
function newRootIsNotOldRoot(newCollection, oldCollection) {
return oldCollection &&
newCollection.catalogRootLink &&
oldCollection.catalogRootLink &&
newCollection.catalogRootLink.url !== oldCollection.catalogRootLink.url;
}
function shouldClear(newCollection, oldCollection) {
return newCollectionIsOldRoot(newCollection, oldCollection) ||
newCollectionIsNewRoot(newCollection) ||
newRootIsNotOldRoot(newCollection, oldCollection);
}
exports.shouldClear = shouldClear;
function addLink(history, link) {
return history.concat([Object.assign({ id: null }, link)]);
}
exports.addLink = addLink;
function addCollection(history, collection) {
return history.concat([{
id: collection.id,
url: collection.url,
text: collection.title
}]);
}
exports.addCollection = addCollection;
function shorten(history, newUrl) {
var newUrlIndex = history.findIndex(function (link) { return link.url === newUrl; });
if (newUrlIndex !== -1) {
return history.slice(0, newUrlIndex);
}
else {
return history;
}
}
exports.shorten = shorten;
function shouldAddRoot(newCollection) {
return newCollection.catalogRootLink && newCollection.catalogRootLink.text && !newCollectionIsNewRoot(newCollection);
}
exports.shouldAddRoot = shouldAddRoot;
function onlyRoot(newCollection) {
return addLink([], newCollection.catalogRootLink);
}
exports.onlyRoot = onlyRoot;
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = function (state, action) {
var newHistory = state.history.slice(0);
var newCollection = Object.freeze(action.data);
var oldCollection = Object.freeze(state.data);
var cleared = false;
if (shouldClear(newCollection, oldCollection)) {
newHistory = [];
cleared = true;
}
var newHistoryCopy = newHistory.slice(0);
newHistory = shorten(newHistoryCopy, newCollection.url);
var shortened = newHistory !== newHistoryCopy;
if (!cleared && !shortened && oldCollection && !newCollectionIsOldCollection(newCollection, oldCollection)) {
newHistory = addCollection(newHistory, oldCollection);
}
if (newHistory.length === 0 && shouldAddRoot(newCollection)) {
newHistory = onlyRoot(newCollection);
}
return newHistory;
};