1 files changed, 251 insertions, 0 deletions

diff --git a/client/src/root-helpers/plugins-manager.ts b/client/src/root-helpers/plugins-manager.ts
new file mode 100644
index 000000000..f919db8af
--- /dev/null
+++ b/client/src/root-helpers/plugins-manager.ts
@@ -0,0 +1,251 @@
+import * as debug from 'debug'
+import { ReplaySubject } from 'rxjs'
+import { first, shareReplay } from 'rxjs/operators'
+import { RegisterClientHelpers } from 'src/types/register-client-option.model'
+import { getHookType, internalRunHook } from '@shared/core-utils/plugins/hooks'
+import {
+  ClientHookName,
+  clientHookObject,
+  ClientScript,
+  HTMLServerConfig,
+  PluginClientScope,
+  PluginType,
+  RegisterClientFormFieldOptions,
+  RegisterClientHookOptions,
+  RegisterClientSettingsScript,
+  RegisterClientVideoFieldOptions,
+  ServerConfigPlugin
+} from '../../../shared/models'
+import { environment } from '../environments/environment'
+import { ClientScript as ClientScriptModule } from '../types/client-script.model'
+
+interface HookStructValue extends RegisterClientHookOptions {
+  plugin: ServerConfigPlugin
+  clientScript: ClientScript
+}
+
+type Hooks = { [ name: string ]: HookStructValue[] }
+
+type PluginInfo = {
+  plugin: ServerConfigPlugin
+  clientScript: ClientScript
+  pluginType: PluginType
+  isTheme: boolean
+}
+
+type PeertubeHelpersFactory = (pluginInfo: PluginInfo) => RegisterClientHelpers
+type OnFormFields = (options: RegisterClientFormFieldOptions, videoFormOptions: RegisterClientVideoFieldOptions) => void
+type OnSettingsScripts = (pluginInfo: PluginInfo, options: RegisterClientSettingsScript) => void
+
+const logger = debug('peertube:plugins')
+
+class PluginsManager {
+  private hooks: Hooks = {}
+
+  private scopes: { [ scopeName: string ]: PluginInfo[] } = {}
+
+  private loadedScripts: { [ script: string ]: boolean } = {}
+  private loadedScopes: PluginClientScope[] = []
+  private loadingScopes: { [id in PluginClientScope]?: boolean } = {}
+
+  private pluginsLoaded: { [ scope in PluginClientScope ]: ReplaySubject<boolean> } = {
+    common: new ReplaySubject<boolean>(1),
+    'admin-plugin': new ReplaySubject<boolean>(1),
+    search: new ReplaySubject<boolean>(1),
+    'video-watch': new ReplaySubject<boolean>(1),
+    signup: new ReplaySubject<boolean>(1),
+    login: new ReplaySubject<boolean>(1),
+    'video-edit': new ReplaySubject<boolean>(1),
+    embed: new ReplaySubject<boolean>(1)
+  }
+
+  private readonly peertubeHelpersFactory: PeertubeHelpersFactory
+  private readonly onFormFields: OnFormFields
+  private readonly onSettingsScripts: OnSettingsScripts
+
+  constructor (options: {
+    peertubeHelpersFactory: PeertubeHelpersFactory
+    onFormFields?: OnFormFields
+    onSettingsScripts?: OnSettingsScripts
+  }) {
+    this.peertubeHelpersFactory = options.peertubeHelpersFactory
+    this.onFormFields = options.onFormFields
+    this.onSettingsScripts = options.onSettingsScripts
+  }
+
+  static getPluginPathPrefix (isTheme: boolean) {
+    return isTheme ? '/themes' : '/plugins'
+  }
+
+  loadPluginsList (config: HTMLServerConfig) {
+    for (const plugin of config.plugin.registered) {
+      this.addPlugin(plugin)
+    }
+  }
+
+  async runHook<T> (hookName: ClientHookName, result?: T, params?: any) {
+    if (!this.hooks[hookName]) return result
+
+    const hookType = getHookType(hookName)
+
+    for (const hook of this.hooks[hookName]) {
+      console.log('Running hook %s of plugin %s.', hookName, hook.plugin.name)
+
+      result = await internalRunHook(hook.handler, hookType, result, params, err => {
+        console.error('Cannot run hook %s of script %s of plugin %s.', hookName, hook.clientScript.script, hook.plugin.name, err)
+      })
+    }
+
+    return result
+  }
+
+  ensurePluginsAreLoaded (scope: PluginClientScope) {
+    this.loadPluginsByScope(scope)
+
+    return this.pluginsLoaded[scope].asObservable()
+               .pipe(first(), shareReplay())
+               .toPromise()
+  }
+
+  async reloadLoadedScopes () {
+    for (const scope of this.loadedScopes) {
+      await this.loadPluginsByScope(scope, true)
+    }
+  }
+
+  addPlugin (plugin: ServerConfigPlugin, isTheme = false) {
+    const pathPrefix = PluginsManager.getPluginPathPrefix(isTheme)
+
+    for (const key of Object.keys(plugin.clientScripts)) {
+      const clientScript = plugin.clientScripts[key]
+
+      for (const scope of clientScript.scopes) {
+        if (!this.scopes[scope]) this.scopes[scope] = []
+
+        this.scopes[scope].push({
+          plugin,
+          clientScript: {
+            script: `${pathPrefix}/${plugin.name}/${plugin.version}/client-scripts/${clientScript.script}`,
+            scopes: clientScript.scopes
+          },
+          pluginType: isTheme ? PluginType.THEME : PluginType.PLUGIN,
+          isTheme
+        })
+
+        this.loadedScripts[clientScript.script] = false
+      }
+    }
+  }
+
+  removePlugin (plugin: ServerConfigPlugin) {
+    for (const key of Object.keys(this.scopes)) {
+      this.scopes[key] = this.scopes[key].filter(o => o.plugin.name !== plugin.name)
+    }
+  }
+
+  async loadPluginsByScope (scope: PluginClientScope, isReload = false) {
+    if (this.loadingScopes[scope]) return
+    if (!isReload && this.loadedScopes.includes(scope)) return
+
+    this.loadingScopes[scope] = true
+
+    logger('Loading scope %s', scope)
+
+    try {
+      if (!isReload) this.loadedScopes.push(scope)
+
+      const toLoad = this.scopes[ scope ]
+      if (!Array.isArray(toLoad)) {
+        this.loadingScopes[scope] = false
+        this.pluginsLoaded[scope].next(true)
+
+        logger('Nothing to load for scope %s', scope)
+        return
+      }
+
+      const promises: Promise<any>[] = []
+      for (const pluginInfo of toLoad) {
+        const clientScript = pluginInfo.clientScript
+
+        if (this.loadedScripts[ clientScript.script ]) continue
+
+        promises.push(this.loadPlugin(pluginInfo))
+
+        this.loadedScripts[ clientScript.script ] = true
+      }
+
+      await Promise.all(promises)
+
+      this.pluginsLoaded[scope].next(true)
+      this.loadingScopes[scope] = false
+
+      logger('Scope %s loaded', scope)
+    } catch (err) {
+      console.error('Cannot load plugins by scope %s.', scope, err)
+    }
+  }
+
+  private loadPlugin (pluginInfo: PluginInfo) {
+    const { plugin, clientScript } = pluginInfo
+
+    const registerHook = (options: RegisterClientHookOptions) => {
+      if (clientHookObject[options.target] !== true) {
+        console.error('Unknown hook %s of plugin %s. Skipping.', options.target, plugin.name)
+        return
+      }
+
+      if (!this.hooks[options.target]) this.hooks[options.target] = []
+
+      this.hooks[options.target].push({
+        plugin,
+        clientScript,
+        target: options.target,
+        handler: options.handler,
+        priority: options.priority || 0
+      })
+    }
+
+    const registerVideoField = (commonOptions: RegisterClientFormFieldOptions, videoFormOptions: RegisterClientVideoFieldOptions) => {
+      if (!this.onFormFields) {
+        throw new Error('Video field registration is not supported')
+      }
+
+      return this.onFormFields(commonOptions, videoFormOptions)
+    }
+
+    const registerSettingsScript = (options: RegisterClientSettingsScript) => {
+      if (!this.onSettingsScripts) {
+        throw new Error('Registering settings script is not supported')
+      }
+
+      return this.onSettingsScripts(pluginInfo, options)
+    }
+
+    const peertubeHelpers = this.peertubeHelpersFactory(pluginInfo)
+
+    console.log('Loading script %s of plugin %s.', clientScript.script, plugin.name)
+
+    const absURL = (environment.apiUrl || window.location.origin) + clientScript.script
+    return import(/* webpackIgnore: true */ absURL)
+      .then((script: ClientScriptModule) => script.register({ registerHook, registerVideoField, registerSettingsScript, peertubeHelpers }))
+      .then(() => this.sortHooksByPriority())
+      .catch(err => console.error('Cannot import or register plugin %s.', pluginInfo.plugin.name, err))
+  }
+
+  private sortHooksByPriority () {
+    for (const hookName of Object.keys(this.hooks)) {
+      this.hooks[hookName].sort((a, b) => {
+        return b.priority - a.priority
+      })
+    }
+  }
+}
+
+export {
+  PluginsManager,
+
+  PluginInfo,
+  PeertubeHelpersFactory,
+  OnFormFields,
+  OnSettingsScripts
+}