38 lines
1.2 KiB
TypeScript
38 lines
1.2 KiB
TypeScript
import {Middleware, Injectable, Inject, Config, Session} from '@extollo/lib'
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import {ColorPalette} from '../../configs/app.config'
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/**
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* SiteTheme Middleware
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* --------------------------------------------
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* Determines the correct color theme for the request.
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*/
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@Injectable()
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export class SiteTheme extends Middleware {
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@Inject()
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protected readonly config!: Config
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@Inject()
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protected readonly session!: Session
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public async apply() {
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const themes = this.config.get('app.colors') as Record<string, ColorPalette>
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const themeKeys = Object.keys(themes)
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const existingThemeName = this.session.get('theme.name')
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const forceNewTheme = Boolean(this.request.input('forceNewTheme'))
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const explicitTheme = String(this.request.input('theme') || '')
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if ( explicitTheme && themeKeys.includes(explicitTheme) ) {
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this.session.set('theme.name', explicitTheme)
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return
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}
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if ( existingThemeName && !forceNewTheme ) {
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return
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}
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const themeName = themeKeys[Math.floor(Math.random() * themeKeys.length)]
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this.session.set('theme.name', themeName)
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}
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}
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