73a8e77d32
For https://github.com/vector-im/riot-web/issues/13635 This is an incomplete implementation and is mostly dumped in this state for review purposes. The remainder of the features/bugs are expected to be in more bite-sized chunks. This exposes the RoomListStore on the window for easy access to things like the new filter functions (used in debugging). This also adds initial handling of "new rooms" to the client, though the support is poor. Known bugs: * [ ] Regenerates the entire room list when a new room is seen. * [ ] Doesn't handle 2+ filters at the same time very well (see gif. will need a priority/ordering of some sort). * [ ] Doesn't handle room order changes within a tag yet, despite the docs implying it does.
61 lines
2.1 KiB
TypeScript
61 lines
2.1 KiB
TypeScript
/*
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Copyright 2020 The Matrix.org Foundation C.I.C.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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/**
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* Determines if two arrays are different through a shallow comparison.
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* @param a The first array. Must be defined.
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* @param b The second array. Must be defined.
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* @returns True if they are the same, false otherwise.
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*/
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export function arrayHasDiff(a: any[], b: any[]): boolean {
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if (a.length === b.length) {
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// When the lengths are equal, check to see if either array is missing
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// an element from the other.
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if (b.some(i => !a.includes(i))) return true;
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if (a.some(i => !b.includes(i))) return true;
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} else {
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return true; // different lengths means they are naturally diverged
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}
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}
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/**
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* Performs a diff on two arrays. The result is what is different with the
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* first array (`added` in the returned object means objects in B that aren't
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* in A). Shallow comparisons are used to perform the diff.
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* @param a The first array. Must be defined.
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* @param b The second array. Must be defined.
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* @returns The diff between the arrays.
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*/
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export function arrayDiff<T>(a: T[], b: T[]): { added: T[], removed: T[] } {
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return {
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added: b.filter(i => !a.includes(i)),
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removed: a.filter(i => !b.includes(i)),
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};
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}
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/**
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* Converts an iterator to an array. Not recommended to be called with infinite
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* generator types.
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* @param i The iterator to convert.
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* @returns The array from the iterator.
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*/
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export function iteratorToArray<T>(i: Iterable<T>): T[] {
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const a: T[] = [];
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for (const e of i) {
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a.push(e);
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}
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return a;
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}
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