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import { Inject, Injectable } from '@nestjs/common'; |
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import { NextFunction, Request, Response } from 'express'; |
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import { NestExpressApplication } from '@nestjs/platform-express'; |
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import { Environment, FileSystemLoader, TemplateCallback } from 'nunjucks'; |
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import { runtime } from 'nunjucks'; |
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import { ITemplates } from '../ITemplates'; |
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import { RouteNameResolver } from '../../Common/ExtendedRouting/RouteNameResolver'; |
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import { ITranslator } from 'src/Infrastructure/Translations/ITranslator'; |
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import { formatFullName } from '../../Common/Utils/formatUtils'; |
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import { |
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formatDate, |
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formatHtmlDate, |
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minutesToHours |
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} from '../../Common/Utils/dateUtils'; |
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import { ArrayUtils } from '../../Common/Utils/ArrayUtils'; |
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import { TablesExtension } from './TablesExtension'; |
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import { getMonth, getYear } from 'date-fns'; |
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@Injectable() |
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export class NunjucksTemplates implements ITemplates { |
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private env: Environment; |
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constructor( |
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private readonly resolver: RouteNameResolver, |
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@Inject('ITranslator') |
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private readonly translator: ITranslator |
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) {} |
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private createEnv(viewsDir: string): Environment { |
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const loader = new FileSystemLoader(viewsDir, { |
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watch: process.env.NODE_ENV !== 'production' |
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}); |
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const env = new Environment(loader); |
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env.addFilter('trans', (key, params = {}) => |
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this.translator.translate(key, params) |
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); |
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env.addFilter('startswith', (value: string | null, other: string) => |
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value ? value.startsWith(other) : false |
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); |
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env.addFilter('minutesToHours', minutes => minutesToHours(minutes)); |
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env.addFilter('fullName', obj => formatFullName(obj)); |
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env.addFilter('date', value => |
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value === 'now' ? new Date() : formatDate(value) |
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); |
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env.addFilter('htmlDate', value => formatHtmlDate(value)); |
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env.addFilter('htmlYearMonth', value => formatHtmlDate(value).slice(0, 7)); |
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env.addFilter('longMonth', (month: number) => |
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this.translator.translate('common-month-long', { |
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date: new Date(2023, month, 15) |
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}) |
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); |
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env.addFilter('year', (date: Date) => getYear(date)); |
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env.addFilter('zip', (left, right) => ArrayUtils.zip(left, right)); |
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env.addFilter('merge', (left, right) => { |
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const result = {}; |
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for (const key in left) { |
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result[key] = left[key]; |
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} |
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for (const key in right) { |
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result[key] = right[key]; |
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} |
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return result; |
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}); |
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env.addExtension('tables', new TablesExtension(this)); |
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return env; |
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} |
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registerViewEngine(app: NestExpressApplication, assetsRoot: string): void { |
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const express = app.getHttpAdapter().getInstance(); |
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this.env = this.createEnv(express.get('views')); |
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app.use((req: Request, res: Response, next: NextFunction): void => { |
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const ctx = (res.locals.njkCtx = res.locals.njkCtx ?? {}); |
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ctx['req'] = req; |
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ctx['path'] = (name: string, params: object = {}) => { |
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try { |
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return this.resolver.resolve(name, params); |
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} catch { |
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return '#'; |
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} |
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}; |
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ctx['url'] = (name: string, params: object = {}) => { |
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try { |
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const path = this.resolver.resolve(name, params); |
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const proto = req.protocol; |
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const origin = req.get('Host'); |
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const baseUrl = `${proto}://${origin}`; |
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const url = new URL(path, baseUrl); |
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return url.toString(); |
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} catch { |
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return '#'; |
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} |
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}; |
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ctx['view_name'] = this.resolver.getName(req.url); |
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ctx['asset'] = (path: string) => `${assetsRoot}/${path}`; |
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ctx['now'] = new Date(); |
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ctx['theme'] = req.cookies.theme; |
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next(); |
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}); |
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app.engine( |
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'njk', |
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( |
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name: string, |
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ctx: Record<string, any>, |
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cb: TemplateCallback<string> |
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) => { |
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this.env.render(name, { ...ctx, ...ctx._locals.njkCtx }, cb); |
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} |
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); |
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app.setViewEngine('njk'); |
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} |
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public render(name: string, context: object): string { |
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return this.env.render(name, context); |
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} |
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public markSafe(html: string): any { |
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return new runtime.SafeString(html); |
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} |
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} |
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fairnesscoop /
permacoop
