mirror of
https://github.com/ae-utbm/sith.git
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261 lines
7.9 KiB
JavaScript
261 lines
7.9 KiB
JavaScript
/**
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* @typedef PictureIdentification
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* @property {number} id The actual id of the identification
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* @property {UserProfile} user The identified user
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*/
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/**
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* A container for a picture with the users identified on it
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* able to prefetch its data.
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*/
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class PictureWithIdentifications {
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identifications = null;
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image_loading = false;
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identifications_loading = false;
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/**
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* @param {Picture} picture
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*/
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constructor(picture) {
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Object.assign(this, picture);
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}
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/**
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* @param {Picture} picture
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*/
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static from_picture(picture) {
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return new PictureWithIdentifications(picture);
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}
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/**
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* If not already done, fetch the users identified on this picture and
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* populate the identifications field
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* @param {?Object=} options
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* @return {Promise<void>}
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*/
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async load_identifications(options) {
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if (this.identifications_loading) {
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return; // The users are already being fetched.
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}
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if (!!this.identifications && !options?.force_reload) {
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// The users are already fetched
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// and the user does not want to force the reload
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return;
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}
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this.identifications_loading = true;
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const url = `/api/sas/picture/${this.id}/identified`;
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this.identifications = await (await fetch(url)).json();
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this.identifications_loading = false;
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}
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/**
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* Preload the photo and the identifications
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* @return {Promise<void>}
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*/
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async preload() {
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const img = new Image();
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img.src = this.compressed_url;
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if (!img.complete) {
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this.image_loading = true;
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img.addEventListener("load", () => {
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this.image_loading = false;
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});
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}
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await this.load_identifications();
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}
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}
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document.addEventListener("alpine:init", () => {
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Alpine.data("picture_viewer", () => ({
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/**
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* All the pictures that can be displayed on this picture viewer
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* @type PictureWithIdentifications[]
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**/
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pictures: [],
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/**
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* The currently displayed picture
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* Default dummy data are pre-loaded to avoid javascript error
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* when loading the page at the beginning
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* @type PictureWithIdentifications
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**/
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current_picture: {
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is_moderated: true,
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id: null,
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name: "",
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display_name: "",
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compressed_url: "",
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profile_url: "",
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full_size_url: "",
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owner: "",
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date: new Date(),
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identifications: [],
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},
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/**
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* The picture which will be displayed next if the user press the "next" button
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* @type ?PictureWithIdentifications
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**/
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next_picture: null,
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/**
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* The picture which will be displayed next if the user press the "previous" button
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* @type ?PictureWithIdentifications
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**/
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previous_picture: null,
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/**
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* The select2 component used to identify users
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**/
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selector: undefined,
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/**
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* true if the page is in a loading state, else false
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**/
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/**
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* Error message when a moderation operation fails
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* @type string
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**/
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moderation_error: "",
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/**
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* Method of pushing new url to the browser history
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* Used by popstate event and always reset to it's default value when used
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* @type History
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**/
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pushstate: History.PUSH,
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async init() {
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this.pictures = (await fetch_paginated(picture_endpoint)).map(
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PictureWithIdentifications.from_picture,
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);
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this.selector = sithSelect2({
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element: $(this.$refs.search),
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data_source: remote_data_source("/api/user/search", {
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excluded: () => [
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...(this.current_picture.identifications || []).map(
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(i) => i.user.id,
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),
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],
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result_converter: (obj) => Object({ ...obj, text: obj.display_name }),
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}),
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picture_getter: (user) => user.profile_pict,
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});
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this.current_picture = this.pictures.find(
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(i) => i.id === first_picture_id,
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);
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this.$watch("current_picture", () => this.update_picture());
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window.addEventListener("popstate", async (event) => {
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if (!event.state || event.state.sas_picture_id === undefined) {
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return;
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}
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this.pushstate = History.REPLACE;
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this.current_picture = this.pictures.find(
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(i) => i.id === parseInt(event.state.sas_picture_id),
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);
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});
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this.pushstate = History.REPLACE; /* Avoid first url push */
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await this.update_picture();
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},
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/**
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* Update the page.
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* Called when the `current_picture` property changes.
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*
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* The url is modified without reloading the page,
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* and the previous picture, the next picture and
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* the list of identified users are updated.
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*/
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async update_picture() {
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const update_args = [
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{ sas_picture_id: this.current_picture.id },
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"",
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`/sas/picture/${this.current_picture.id}/`,
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];
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if (this.pushstate === History.REPLACE) {
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window.history.replaceState(...update_args);
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this.pushstate = History.PUSH;
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} else {
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window.history.pushState(...update_args);
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}
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this.moderation_error = "";
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const index = this.pictures.indexOf(this.current_picture);
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this.previous_picture = this.pictures[index - 1] || null;
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this.next_picture = this.pictures[index + 1] || null;
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await this.current_picture.load_identifications();
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this.$refs.main_picture?.addEventListener("load", () => {
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// once the current picture is loaded,
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// start preloading the next and previous pictures
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this.next_picture?.preload();
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this.previous_picture?.preload();
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});
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},
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async moderate_picture() {
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const res = await fetch(
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`/api/sas/picture/${this.current_picture.id}/moderate`,
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{
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method: "PATCH",
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},
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);
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if (!res.ok) {
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this.moderation_error = `${gettext("Couldn't moderate picture")} : ${res.statusText}`;
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return;
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}
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this.current_picture.is_moderated = true;
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this.current_picture.asked_for_removal = false;
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},
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async delete_picture() {
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const res = await fetch(`/api/sas/picture/${this.current_picture.id}`, {
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method: "DELETE",
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});
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if (!res.ok) {
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this.moderation_error =
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gettext("Couldn't delete picture") + " : " + res.statusText;
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return;
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}
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this.pictures.splice(this.pictures.indexOf(this.current_picture), 1);
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if (this.pictures.length === 0) {
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// The deleted picture was the only one in the list.
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// As the album is now empty, go back to the parent page
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document.location.href = album_url;
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}
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this.current_picture = this.next_picture || this.previous_picture;
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},
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/**
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* Send the identification request and update the list of identified users.
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*/
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async submit_identification() {
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const url = `/api/sas/picture/${this.current_picture.id}/identified`;
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await fetch(url, {
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method: "PUT",
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body: JSON.stringify(this.selector.val().map((i) => parseInt(i))),
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});
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// refresh the identified users list
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await this.current_picture.load_identifications({ force_reload: true });
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this.selector.empty().trigger("change");
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},
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/**
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* Check if an identification can be removed by the currently logged user
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* @param {PictureIdentification} identification
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* @return {boolean}
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*/
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can_be_removed(identification) {
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return user_is_sas_admin || identification.user.id === user_id;
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},
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/**
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* Untag a user from the current picture
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* @param {PictureIdentification} identification
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*/
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async remove_identification(identification) {
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const res = await fetch(`/api/sas/relation/${identification.id}`, {
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method: "DELETE",
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});
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if (res.ok && Array.isArray(this.current_picture.identifications)) {
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this.current_picture.identifications =
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this.current_picture.identifications.filter(
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(i) => i.id !== identification.id,
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);
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}
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},
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}));
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});
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