From 42b40636991b97fe818007fab19091764fc5db73 Mon Sep 17 00:00:00 2001
From: Chocobozzz <me@florianbigard.com>
Date: Fri, 15 Jul 2022 15:30:14 +0200
Subject: Add ability for client to create server logs

---
 client/src/root-helpers/logger.ts | 138 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 138 insertions(+)
 create mode 100644 client/src/root-helpers/logger.ts

(limited to 'client/src/root-helpers/logger.ts')

diff --git a/client/src/root-helpers/logger.ts b/client/src/root-helpers/logger.ts
new file mode 100644
index 000000000..cd559cfa7
--- /dev/null
+++ b/client/src/root-helpers/logger.ts
@@ -0,0 +1,138 @@
+import { ClientLogCreate } from '@shared/models/server'
+import { peertubeLocalStorage } from './peertube-web-storage'
+import { UserTokens } from './users'
+
+export type LoggerHook = (message: LoggerMessage, meta?: LoggerMeta) => void
+export type LoggerLevel = 'info' | 'warn' | 'error'
+
+export type LoggerMessage = string | Error | object
+export type LoggerMeta = Error | { [ id: string ]: any, err?: Error }
+
+declare global {
+  interface Window {
+    logger: Logger
+  }
+}
+
+class Logger {
+  private readonly hooks: { level: LoggerLevel, hook: LoggerHook }[] = []
+
+  info (message: LoggerMessage, meta?: LoggerMeta) {
+    this.runHooks('info', message, meta)
+
+    if (meta) console.log(message, meta)
+    else console.log(message)
+  }
+
+  warn (message: LoggerMessage, meta?: LoggerMeta) {
+    this.runHooks('warn', message, meta)
+
+    if (meta) console.warn(message, meta)
+    else console.warn(message)
+  }
+
+  error (message: LoggerMessage, meta?: LoggerMeta) {
+    this.runHooks('error', message, meta)
+
+    if (meta) console.error(message, meta)
+    else console.error(message)
+  }
+
+  addHook (level: LoggerLevel, hook: LoggerHook) {
+    this.hooks.push({ level, hook })
+  }
+
+  registerServerSending (serverUrl: string) {
+    this.addHook('warn', (message, meta) => this.sendClientLog(serverUrl, this.buildServerLogPayload('warn', message, meta)))
+    this.addHook('error', (message, meta) => this.sendClientLog(serverUrl, this.buildServerLogPayload('error', message, meta)))
+  }
+
+  sendClientLog (serverUrl: string, payload: ClientLogCreate | null) {
+    if (!payload) return
+
+    const headers = new Headers({
+      Accept: 'application/json',
+      'Content-Type': 'application/json'
+    })
+
+    try {
+      const tokens = UserTokens.getUserTokens(peertubeLocalStorage)
+
+      if (tokens) headers.set('Authorization', `${tokens.tokenType} ${tokens.accessToken}`)
+    } catch (err) {
+      console.error('Cannot set tokens to client log sender.', { err })
+    }
+
+    try {
+      fetch(serverUrl + '/api/v1/server/logs/client', {
+        headers,
+        method: 'POST',
+        body: JSON.stringify(payload)
+      })
+    } catch (err) {
+      console.error('Cannot send client warn/error to server.', err)
+    }
+  }
+
+  private buildServerLogPayload (level: Extract<LoggerLevel, 'warn' | 'error'>, message: LoggerMessage, meta?: LoggerMeta) {
+    if (!message) return null
+
+    return {
+      message: this.buildMessageServerLogPayload(message),
+      userAgent: navigator.userAgent,
+      url: window.location.href,
+      level,
+      stackTrace: this.buildStackServerLogPayload(message, meta),
+      meta: this.buildMetaServerLogPayload(meta)
+    }
+  }
+
+  private buildMessageServerLogPayload (message: LoggerMessage) {
+    if (typeof message === 'string') return message
+    if (message instanceof Error) return message.message
+
+    return JSON.stringify(message)
+  }
+
+  private buildStackServerLogPayload (message: LoggerMessage, meta?: LoggerMeta) {
+    if (message instanceof Error) return message.stack
+    if (meta instanceof Error) return meta.stack
+    if (meta?.err instanceof Error) return meta.err.stack
+
+    return undefined
+  }
+
+  private buildMetaServerLogPayload (meta?: LoggerMeta) {
+    if (!meta) return undefined
+    if (meta instanceof Error) return undefined
+
+    let result: string
+
+    try {
+      result = JSON.stringify(meta, (key, value) => {
+        if (key === 'err') return undefined
+
+        return value
+      })
+    } catch (err) {
+      console.error('Cannot stringify meta.', err)
+    }
+
+    return result
+  }
+
+  private runHooks (level: LoggerLevel, message: LoggerMessage, meta?: LoggerMeta) {
+    for (const hookObj of this.hooks) {
+      if (hookObj.level !== level) continue
+
+      hookObj.hook(message, meta)
+    }
+  }
+}
+
+const logger = window.logger || new Logger()
+window.logger = logger
+
+export {
+  logger
+}
-- 
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