lemmy/ui/src/utils.ts

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import { UserOperation, Comment, User, SortType, ListingType } from './interfaces';
import * as markdown_it from 'markdown-it';
export let repoUrl = 'https://github.com/dessalines/lemmy';
export function msgOp(msg: any): UserOperation {
let opStr: string = msg.op;
return UserOperation[opStr];
}
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var md = new markdown_it({
html: true,
linkify: true,
typographer: true
});
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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)};
}
export function getUnixTime(text: string): number {
return text ? new Date(text).getTime()/1000 : undefined;
}
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): 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;
} else {
modIds = modIds.slice(0, yourIndex+1); // +1 cause you cant mod yourself
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))`);
export function isImage(url: string) {
return imageRegex.test(url);
}
export let fetchLimit: number = 20;
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)];
}