lemmy/ui/src/utils.ts

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import 'moment/locale/es';
import 'moment/locale/eo';
import 'moment/locale/de';
import 'moment/locale/zh-cn';
import 'moment/locale/fr';
import 'moment/locale/sv';
import 'moment/locale/ru';
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import 'moment/locale/nl';
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import { UserOperation, Comment, User, SortType, ListingType, SearchType } from './interfaces';
import * as markdown_it from 'markdown-it';
import * as markdownitEmoji from 'markdown-it-emoji/light';
import * as markdown_it_container from 'markdown-it-container';
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import * as twemoji from 'twemoji';
import * as emojiShortName from 'emoji-short-name';
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export const repoUrl = 'https://github.com/dessalines/lemmy';
export const markdownHelpUrl = 'https://commonmark.org/help/';
export const postRefetchSeconds: number = 60*1000;
export const fetchLimit: number = 20;
export const mentionDropdownFetchLimit = 6;
export function randomStr() {return Math.random().toString(36).replace(/[^a-z]+/g, '').substr(2, 10)}
export function msgOp(msg: any): UserOperation {
let opStr: string = msg.op;
return UserOperation[opStr];
}
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export const md = new markdown_it({
html: false,
linkify: true,
typographer: true
}).use(markdown_it_container, 'spoiler', {
validate: function(params: any) {
return params.trim().match(/^spoiler\s+(.*)$/);
},
render: function (tokens: any, idx: any) {
var m = tokens[idx].info.trim().match(/^spoiler\s+(.*)$/);
if (tokens[idx].nesting === 1) {
// opening tag
return '<details><summary>' + md.utils.escapeHtml(m[1]) + '</summary>\n';
} else {
// closing tag
return '</details>\n';
}
}
}).use(markdownitEmoji, {
defs: objectFlip(emojiShortName)
});
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md.renderer.rules.emoji = function(token, idx) {
return twemoji.parse(token[idx].content);
};
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export function hotRank(comment: Comment): number {
// Rank = ScaleFactor * sign(Score) * log(1 + abs(Score)) / (Time + 2)^Gravity
let date: Date = new Date(comment.published + 'Z'); // Add Z to convert from UTC date
let now: Date = new Date();
let hoursElapsed: number = (now.getTime() - date.getTime()) / 36e5;
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let rank = (10000 * Math.log10(Math.max(1, 3 + comment.score))) / Math.pow(hoursElapsed + 2, 1.8);
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// console.log(`Comment: ${comment.content}\nRank: ${rank}\nScore: ${comment.score}\nHours: ${hoursElapsed}`);
return rank;
}
export function mdToHtml(text: string) {
return {__html: md.render(text)};
}
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export function getUnixTime(text: string): number {
return text ? new Date(text).getTime()/1000 : undefined;
}
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export function addTypeInfo<T>(arr: Array<T>, name: string): Array<{type_: string, data: T}> {
return arr.map(e => {return {type_: name, data: e}});
}
export function canMod(user: User, modIds: Array<number>, creator_id: number, onSelf: boolean = false): boolean {
// You can do moderator actions only on the mods added after you.
if (user) {
let yourIndex = modIds.findIndex(id => id == user.id);
if (yourIndex == -1) {
return false;
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} else {
// onSelf +1 on mod actions not for yourself, IE ban, remove, etc
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modIds = modIds.slice(0, yourIndex+(onSelf ? 0 : 1));
return !modIds.includes(creator_id);
}
} else {
return false;
}
}
export function isMod(modIds: Array<number>, creator_id: number): boolean {
return modIds.includes(creator_id);
}
var imageRegex = new RegExp(`(http)?s?:?(\/\/[^"']*\.(?:png|jpg|jpeg|gif|png|svg))`);
var videoRegex = new RegExp(`(http)?s?:?(\/\/[^"']*\.(?:mp4))`);
export function isImage(url: string) {
return imageRegex.test(url);
}
export function isVideo(url: string) {
return videoRegex.test(url);
}
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export function validURL(str: string) {
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try {
return !!new URL(str);
} catch {
return false;
}
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}
export function capitalizeFirstLetter(str: string): string {
return str.charAt(0).toUpperCase() + str.slice(1);
}
export function routeSortTypeToEnum(sort: string): SortType {
if (sort == 'new') {
return SortType.New;
} else if (sort == 'hot') {
return SortType.Hot;
} else if (sort == 'topday') {
return SortType.TopDay;
} else if (sort == 'topweek') {
return SortType.TopWeek;
} else if (sort == 'topmonth') {
return SortType.TopMonth;
} else if (sort == 'topall') {
return SortType.TopAll;
}
}
export function routeListingTypeToEnum(type: string): ListingType {
return ListingType[capitalizeFirstLetter(type)];
}
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export function routeSearchTypeToEnum(type: string): SearchType {
return SearchType[capitalizeFirstLetter(type)];
}
export async function getPageTitle(url: string) {
let res = await fetch(`https://textance.herokuapp.com/title/${url}`);
let data = await res.text();
return data;
}
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export function debounce(func: any, wait: number = 500, immediate: boolean = false) {
// 'private' variable for instance
// The returned function will be able to reference this due to closure.
// Each call to the returned function will share this common timer.
let timeout: number;
// Calling debounce returns a new anonymous function
return function() {
// reference the context and args for the setTimeout function
var context = this,
args = arguments;
// Should the function be called now? If immediate is true
// and not already in a timeout then the answer is: Yes
var callNow = immediate && !timeout;
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// This is the basic debounce behaviour where you can call this
// function several times, but it will only execute once
// [before or after imposing a delay].
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// Each time the returned function is called, the timer starts over.
clearTimeout(timeout);
// Set the new timeout
timeout = setTimeout(function() {
// Inside the timeout function, clear the timeout variable
// which will let the next execution run when in 'immediate' mode
timeout = null;
// Check if the function already ran with the immediate flag
if (!immediate) {
// Call the original function with apply
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// apply lets you define the 'this' object as well as the arguments
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// (both captured before setTimeout)
func.apply(context, args);
}
}, wait);
// Immediate mode and no wait timer? Execute the function..
if (callNow) func.apply(context, args);
}
}
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export function getLanguage(): string {
return (navigator.language || navigator.userLanguage);
}
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export function objectFlip(obj: any) {
const ret = {};
Object.keys(obj).forEach((key) => {
ret[obj[key]] = key;
});
return ret;
}
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export function getMomentLanguage(): string {
let lang = getLanguage();
if (lang.startsWith('zh')) {
lang = 'zh-cn';
} else if (lang.startsWith('sv')) {
lang = 'sv';
} else if (lang.startsWith('fr')) {
lang = 'fr';
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} else if (lang.startsWith('de')) {
lang = 'de';
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} else if (lang.startsWith('ru')) {
lang = 'ru';
} else if (lang.startsWith('es')) {
lang = 'es';
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} else if (lang.startsWith('eo')) {
lang = 'eo';
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} else if (lang.startsWith('nl')) {
lang = 'nl';
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} else {
lang = 'en';
}
return lang;
}
export const themes = ['litera', 'minty', 'solar', 'united', 'cyborg','darkly', 'journal', 'sketchy'];
export function setTheme(theme: string = 'darkly') {
for (var i=0; i < themes.length; i++) {
let styleSheet = document.getElementById(themes[i]);
if (themes[i] == theme) {
styleSheet.removeAttribute("disabled");
} else {
styleSheet.setAttribute("disabled", "disabled");
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}
}
}