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1 | import { first } from 'rxjs/operators' | |
2 | import { Injectable } from '@angular/core' | |
3 | import { UserLocalStorageKeys } from '@root-helpers/users' | |
4 | import { ServerConfig, ServerConfigTheme } from '@shared/models' | |
5 | import { environment } from '../../../environments/environment' | |
6 | import { AuthService } from '../auth' | |
7 | import { PluginService } from '../plugins/plugin.service' | |
8 | import { ServerService } from '../server' | |
9 | import { UserService } from '../users/user.service' | |
10 | import { LocalStorageService } from '../wrappers/storage.service' | |
11 | ||
12 | @Injectable() | |
13 | export class ThemeService { | |
14 | ||
15 | private oldThemeName: string | |
16 | private themes: ServerConfigTheme[] = [] | |
17 | ||
18 | private themeFromLocalStorage: ServerConfigTheme | |
19 | private themeDOMLinksFromLocalStorage: HTMLLinkElement[] = [] | |
20 | ||
21 | private serverConfig: ServerConfig | |
22 | ||
23 | constructor ( | |
24 | private auth: AuthService, | |
25 | private userService: UserService, | |
26 | private pluginService: PluginService, | |
27 | private server: ServerService, | |
28 | private localStorageService: LocalStorageService | |
29 | ) {} | |
30 | ||
31 | initialize () { | |
32 | // Try to load from local storage first, so we don't have to wait network requests | |
33 | this.loadAndSetFromLocalStorage() | |
34 | ||
35 | this.serverConfig = this.server.getTmpConfig() | |
36 | this.server.getConfig() | |
37 | .subscribe(config => { | |
38 | this.serverConfig = config | |
39 | ||
40 | const themes = this.serverConfig.theme.registered | |
41 | ||
42 | this.removeThemeFromLocalStorageIfNeeded(themes) | |
43 | this.injectThemes(themes) | |
44 | ||
45 | this.listenUserTheme() | |
46 | }) | |
47 | } | |
48 | ||
49 | private injectThemes (themes: ServerConfigTheme[], fromLocalStorage = false) { | |
50 | this.themes = themes | |
51 | ||
52 | console.log('Injecting %d themes.', this.themes.length) | |
53 | ||
54 | const head = this.getHeadElement() | |
55 | ||
56 | for (const theme of this.themes) { | |
57 | // Already added this theme? | |
58 | if (fromLocalStorage === false && this.themeFromLocalStorage && this.themeFromLocalStorage.name === theme.name) continue | |
59 | ||
60 | for (const css of theme.css) { | |
61 | const link = document.createElement('link') | |
62 | ||
63 | const href = environment.apiUrl + `/themes/${theme.name}/${theme.version}/css/${css}` | |
64 | link.setAttribute('href', href) | |
65 | link.setAttribute('rel', 'alternate stylesheet') | |
66 | link.setAttribute('type', 'text/css') | |
67 | link.setAttribute('title', theme.name) | |
68 | link.setAttribute('disabled', '') | |
69 | ||
70 | if (fromLocalStorage === true) this.themeDOMLinksFromLocalStorage.push(link) | |
71 | ||
72 | head.appendChild(link) | |
73 | } | |
74 | } | |
75 | } | |
76 | ||
77 | private getCurrentTheme () { | |
78 | if (this.themeFromLocalStorage) return this.themeFromLocalStorage.name | |
79 | ||
80 | const theme = this.auth.isLoggedIn() | |
81 | ? this.auth.getUser().theme | |
82 | : this.userService.getAnonymousUser().theme | |
83 | ||
84 | if (theme !== 'instance-default') return theme | |
85 | return this.serverConfig.theme.default | |
86 | } | |
87 | ||
88 | private loadTheme (name: string) { | |
89 | const links = document.getElementsByTagName('link') | |
90 | for (let i = 0; i < links.length; i++) { | |
91 | const link = links[ i ] | |
92 | if (link.getAttribute('rel').indexOf('style') !== -1 && link.getAttribute('title')) { | |
93 | link.disabled = link.getAttribute('title') !== name | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
98 | private updateCurrentTheme () { | |
99 | if (this.oldThemeName) this.removeThemePlugins(this.oldThemeName) | |
100 | ||
101 | const currentTheme = this.getCurrentTheme() | |
102 | ||
103 | console.log('Enabling %s theme.', currentTheme) | |
104 | ||
105 | this.loadTheme(currentTheme) | |
106 | ||
107 | const theme = this.getTheme(currentTheme) | |
108 | if (theme) { | |
109 | console.log('Adding scripts of theme %s.', currentTheme) | |
110 | this.pluginService.addPlugin(theme, true) | |
111 | ||
112 | this.pluginService.reloadLoadedScopes() | |
113 | ||
114 | this.localStorageService.setItem(UserLocalStorageKeys.LAST_ACTIVE_THEME, JSON.stringify(theme), false) | |
115 | } else { | |
116 | this.localStorageService.removeItem(UserLocalStorageKeys.LAST_ACTIVE_THEME, false) | |
117 | } | |
118 | ||
119 | this.oldThemeName = currentTheme | |
120 | } | |
121 | ||
122 | private listenUserTheme () { | |
123 | // We don't need them anymore | |
124 | this.themeFromLocalStorage = undefined | |
125 | this.themeDOMLinksFromLocalStorage = [] | |
126 | ||
127 | if (!this.auth.isLoggedIn()) { | |
128 | this.updateCurrentTheme() | |
129 | ||
130 | this.localStorageService.watch([ UserLocalStorageKeys.THEME ]).subscribe( | |
131 | () => this.updateCurrentTheme() | |
132 | ) | |
133 | } | |
134 | ||
135 | this.auth.userInformationLoaded | |
136 | .pipe(first()) | |
137 | .subscribe(() => this.updateCurrentTheme()) | |
138 | } | |
139 | ||
140 | private loadAndSetFromLocalStorage () { | |
141 | const lastActiveThemeString = this.localStorageService.getItem(UserLocalStorageKeys.LAST_ACTIVE_THEME) | |
142 | if (!lastActiveThemeString) return | |
143 | ||
144 | try { | |
145 | const lastActiveTheme = JSON.parse(lastActiveThemeString) | |
146 | this.themeFromLocalStorage = lastActiveTheme | |
147 | ||
148 | this.injectThemes([ lastActiveTheme ], true) | |
149 | this.updateCurrentTheme() | |
150 | } catch (err) { | |
151 | console.error('Cannot parse last active theme.', err) | |
152 | return | |
153 | } | |
154 | } | |
155 | ||
156 | private removeThemePlugins (themeName: string) { | |
157 | const oldTheme = this.getTheme(themeName) | |
158 | if (oldTheme) { | |
159 | console.log('Removing scripts of old theme %s.', themeName) | |
160 | this.pluginService.removePlugin(oldTheme) | |
161 | } | |
162 | } | |
163 | ||
164 | private removeThemeFromLocalStorageIfNeeded (themes: ServerConfigTheme[]) { | |
165 | if (!this.themeFromLocalStorage) return | |
166 | ||
167 | const loadedTheme = themes.find(t => t.name === this.themeFromLocalStorage.name) | |
168 | if (!loadedTheme || loadedTheme.version !== this.themeFromLocalStorage.version) { | |
169 | // Need to remove this theme: we loaded an old version or a theme that does not exist anymore | |
170 | this.removeThemePlugins(this.themeFromLocalStorage.name) | |
171 | this.oldThemeName = undefined | |
172 | ||
173 | const head = this.getHeadElement() | |
174 | for (const htmlLinkElement of this.themeDOMLinksFromLocalStorage) { | |
175 | head.removeChild(htmlLinkElement) | |
176 | } | |
177 | ||
178 | this.themeFromLocalStorage = undefined | |
179 | this.themeDOMLinksFromLocalStorage = [] | |
180 | } | |
181 | } | |
182 | ||
183 | private getHeadElement () { | |
184 | return document.getElementsByTagName('head')[0] | |
185 | } | |
186 | ||
187 | private getTheme (name: string) { | |
188 | return this.themes.find(t => t.name === name) | |
189 | } | |
190 | } |