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import { Injectable } from '@angular/core'
import { AuthService } from '@app/core/auth'
import { ServerService } from '@app/core/server'
import { environment } from '../../../environments/environment'
import { PluginService } from '@app/core/plugins/plugin.service'
import { ServerConfigTheme } from '@shared/models'
@Injectable()
export class ThemeService {
private oldThemeName: string
private themes: ServerConfigTheme[] = []
constructor (
private auth: AuthService,
private pluginService: PluginService,
private server: ServerService
) {}
initialize () {
this.server.configLoaded
.subscribe(() => {
this.injectThemes()
this.listenUserTheme()
})
}
private injectThemes () {
this.themes = this.server.getConfig().theme.registered
console.log('Injecting %d themes.', this.themes.length)
const head = document.getElementsByTagName('head')[0]
for (const theme of this.themes) {
for (const css of theme.css) {
const link = document.createElement('link')
const href = environment.apiUrl + `/themes/${theme.name}/${theme.version}/css/${css}`
link.setAttribute('href', href)
link.setAttribute('rel', 'alternate stylesheet')
link.setAttribute('type', 'text/css')
link.setAttribute('title', theme.name)
link.setAttribute('disabled', '')
head.appendChild(link)
}
}
}
private getCurrentTheme () {
if (this.auth.isLoggedIn()) {
const theme = this.auth.getUser().theme
if (theme !== 'instance-default') return theme
}
return this.server.getConfig().theme.default
}
private loadTheme (name: string) {
const links = document.getElementsByTagName('link')
for (let i = 0; i < links.length; i++) {
const link = links[ i ]
if (link.getAttribute('rel').indexOf('style') !== -1 && link.getAttribute('title')) {
link.disabled = link.getAttribute('title') !== name
}
}
}
private updateCurrentTheme () {
if (this.oldThemeName) {
const oldTheme = this.getTheme(this.oldThemeName)
if (oldTheme) {
console.log('Removing scripts of old theme %s.', this.oldThemeName)
this.pluginService.removePlugin(oldTheme)
}
}
const currentTheme = this.getCurrentTheme()
console.log('Enabling %s theme.', currentTheme)
this.loadTheme(currentTheme)
const theme = this.getTheme(currentTheme)
if (theme) {
console.log('Adding scripts of theme %s.', currentTheme)
this.pluginService.addPlugin(theme, true)
this.pluginService.reloadLoadedScopes()
}
this.oldThemeName = currentTheme
}
private listenUserTheme () {
if (!this.auth.isLoggedIn()) {
this.updateCurrentTheme()
}
this.auth.userInformationLoaded
.subscribe(() => this.updateCurrentTheme())
}
private getTheme (name: string) {
return this.themes.find(t => t.name === name)
}
}
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