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fix(ui): dynamic remove doesnt decrement counter
Add a function to decrement the value of the count of videos in the playlist Closes #19
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avallete
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Mar 24, 2021
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,44 @@ | ||
| /** | ||
| * Search into two lists of objects needles and haystack using hashmap | ||
| * If all elements from needles has been found into haystack it return the hashmap | ||
| * If some elements are missing into haystack, we return false. | ||
| * | ||
| * The hashmap keys are generated using needleGetter and haystackGetter | ||
| * The needles must not contain duplicates | ||
| * | ||
| * @param needles unique list of element to search | ||
| * @param haystack list of elements to search in | ||
| * @param needleKeyGetter get the value to use as key from needles | ||
| * @param haystackKeyGetter get the value to match with needle key | ||
| */ | ||
| export default function listMapSearch<T, U, K extends keyof any>( | ||
| needles: Array<T>, | ||
| haystack: Array<U>, | ||
| needleKeyGetter: (item: T) => K, | ||
| haystackKeyGetter: (item: U) => K | ||
| ): Record<K, U> | false { | ||
| const searchMap: Record<K, U | undefined> = {} as Record<K, U> | ||
| // We cannot found all our needles into our haystack | ||
| if (haystack.length < needles.length) { | ||
| return false | ||
| } | ||
| // Fill our searchMap keys with needles to search | ||
| for (const needle of needles) { | ||
| searchMap[needleKeyGetter(needle)] = undefined | ||
| } | ||
| // matches elements from needles with haystack | ||
| let found = 0 | ||
| for (const item of haystack) { | ||
| const itemKey = haystackKeyGetter(item) | ||
| // if key exist in the searchMap and value is still undefined | ||
| if (Object.prototype.hasOwnProperty.call(searchMap, itemKey) === true && searchMap[itemKey] === undefined) { | ||
| searchMap[itemKey] = item | ||
| found += 1 | ||
| // early break if all elements have already been found | ||
| if (found === needles.length) { | ||
| return searchMap as Record<K, U> | ||
| } | ||
| } | ||
| } | ||
| return found === needles.length ? (searchMap as Record<K, U>) : false | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,32 @@ | ||
| import { XPATH } from '~src/selectors' | ||
| import getElementsByXpath from '~src/lib/get-elements-by-xpath' | ||
| import listMapSearch from '~src/lib/list-map-search' | ||
| import { PlaylistVideo } from '~src/youtube' | ||
|
|
||
| // We don't remove but only hide the videos since | ||
| // Youtube webapp use the indexes to handle some actions (remove, reorder) | ||
| // and removing videos from the DOM collide with that behavior | ||
| export default function hideVideosFromPlaylistUI(videosToDelete: PlaylistVideo[]) { | ||
| // cast Node as any to access .data property availlable on ytd-playlist-video-renderer elements | ||
| const playlistVideoRendererNodes = getElementsByXpath(XPATH.YT_PLAYLIST_VIDEO_RENDERERS) as any[] | ||
| // All videos to remove MAY be present in the UI because if there is more videos to remove | ||
| // than videos found into the UI, some removed videos aren't loaded in the UI | ||
| if (playlistVideoRendererNodes.length >= videosToDelete.length) { | ||
| const searchMap = listMapSearch( | ||
| videosToDelete, | ||
| playlistVideoRendererNodes, | ||
| (video) => video.videoId, | ||
| (node) => node.data.videoId | ||
| ) | ||
| // if all videos to remove are present in the UI | ||
| if (searchMap) { | ||
| const htmlElements: HTMLElement[] = Object.values(searchMap) as HTMLElement[] | ||
| for (const element of htmlElements) { | ||
| // hide each item from UI | ||
| element.hidden = true | ||
| } | ||
| return | ||
| } | ||
| } | ||
| throw new Error('some videos are missing from the UI, cannot dynamically delete') | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,11 +1,10 @@ | ||
| import U from '~src/userscript' | ||
|
|
||
| export const XPATH = { | ||
| APP_RENDER_ROOT: '//ytd-playlist-sidebar-renderer/div[@id="items"]/*[last()]', | ||
| YT_PLAYLIST_SIDEBAR_ITEMS: '//ytd-playlist-sidebar-renderer/div[@id="items"]', | ||
| YT_PLAYLIST_VIDEO_RENDERERS: '//yt-playlist-video-renderer', | ||
| YT_PLAYLIST_VIDEO_RENDERERS: '//ytd-playlist-video-renderer', | ||
| YT_NUMBERS_OF_VIDEOS_IN_PLAYLIST: '//ytd-playlist-sidebar-primary-info-renderer/div/yt-formatted-string/span[1]', | ||
| } | ||
|
|
||
| export const ID = { | ||
| APP_ROOT: `${U.id}-root`, | ||
| export default { | ||
| XPATH, | ||
| } |
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