From 356ebd2137eb5ca31486ed49ab8223c8256b1554 Mon Sep 17 00:00:00 2001
From: Florian Dold <florian.dold@gmail.com>
Date: Fri, 18 Nov 2016 04:09:04 +0100
Subject: persistent logging

---
 src/background/background.ts |   2 +-
 src/logging.ts               | 186 +++++++++++++++++++++++++++++++++++++++++++
 src/pages/logs.html          |  36 +++++++++
 src/pages/logs.tsx           |  76 ++++++++++++++++++
 src/popup/popup.tsx          |   3 +
 src/query.ts                 |  41 +++++++++-
 src/wxBackend.ts             |   6 ++
 tsconfig.json                |   8 +-
 8 files changed, 352 insertions(+), 6 deletions(-)
 create mode 100644 src/logging.ts
 create mode 100644 src/pages/logs.html
 create mode 100644 src/pages/logs.tsx

diff --git a/src/background/background.ts b/src/background/background.ts
index c11ff0bd9..8a3f2477d 100644
--- a/src/background/background.ts
+++ b/src/background/background.ts
@@ -33,7 +33,7 @@ window.addEventListener("load", () => {
   System.import("../wxBackend")
     .then((wxMessaging: any) => {
       // Export as global for debugger
-      (window as any).wxMessaging = wxMessaging;
+      (window as any).wx = wxMessaging;
       wxMessaging.wxMain();
     }).catch((e: Error) => {
       console.error("Loading Taler wallet background page failed.", e);
diff --git a/src/logging.ts b/src/logging.ts
new file mode 100644
index 000000000..3f8757a07
--- /dev/null
+++ b/src/logging.ts
@@ -0,0 +1,186 @@
+/*
+ This file is part of TALER
+ (C) 2016 Inria
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Configurable logging.
+ *
+ * @author Florian Dold
+ */
+
+import {Store, QueryRoot} from "./query";
+
+export type Level = "error" | "debug" | "info" | "warn";
+
+function makeInfo() {
+  return console.info.bind(console, "%o");
+}
+
+function makeWarn() {
+  return console.warn.bind(console, "%o");
+}
+
+function makeError() {
+  return console.error.bind(console, "%o");
+}
+
+function makeDebug() {
+  return console.log.bind(console, "%o");
+}
+
+export async function log(msg: string, level: Level = "info"): Promise<void> {
+  let ci = getCallInfo(2);
+  return record(level, msg, ci.file, ci.line, ci.column);
+}
+
+function getCallInfo(level: number) {
+  // see https://github.com/v8/v8/wiki/Stack-Trace-API
+  let stack = Error().stack;
+  if (!stack) {
+    return unknownFrame;
+  }
+  let lines = stack.split("\n");
+  return parseStackLine(lines[level + 1]);
+}
+
+interface Frame {
+  file?: string;
+  method?: string;
+  column?: number;
+  line?: number;
+}
+
+const unknownFrame: Frame = {
+  file: "(unknown)",
+  method: "(unknown)",
+  line: 0,
+  column: 0
+};
+
+/**
+ * Adapted from https://github.com/errwischt/stacktrace-parser.
+ */
+function parseStackLine(stackLine: string): Frame {
+  const chrome = /^\s*at (?:(?:(?:Anonymous function)?|((?:\[object object\])?\S+(?: \[as \S+\])?)) )?\(?((?:file|http|https):.*?):(\d+)(?::(\d+))?\)?\s*$/i;
+  const gecko = /^(?:\s*([^@]*)(?:\((.*?)\))?@)?(\S.*?):(\d+)(?::(\d+))?\s*$/i;
+  const node  = /^\s*at (?:((?:\[object object\])?\S+(?: \[as \S+\])?) )?\(?(.*?):(\d+)(?::(\d+))?\)?\s*$/i;
+  let parts;
+
+  if ((parts = gecko.exec(stackLine))) {
+    let f: Frame = {
+        file: parts[3],
+        method: parts[1] || "(unknown)",
+        line: +parts[4],
+        column: parts[5] ? +parts[5] : undefined,
+    };
+    return f;
+  } else if ((parts = chrome.exec(stackLine))) {
+    let f: Frame = {
+        file: parts[2],
+        method: parts[1] || "(unknown)",
+        line: +parts[3],
+        column: parts[4] ? +parts[4] : undefined,
+    };
+    return f;
+  } else if ((parts = node.exec(stackLine))) {
+    let f: Frame = {
+        file: parts[2],
+        method: parts[1] || "(unknown)",
+        line: +parts[3],
+        column: parts[4] ? +parts[4] : undefined,
+    };
+    return f;
+  }
+  return unknownFrame;
+}
+
+
+let db: IDBDatabase|undefined = undefined;
+
+export interface LogEntry {
+  timestamp: number;
+  level: string;
+  msg: string;
+  source: string|undefined;
+  col: number|undefined;
+  line: number|undefined;
+  id?: number;
+}
+
+export async function getLogs(): Promise<LogEntry[]> {
+  if (!db) {
+    db = await openLoggingDb();
+  }
+  return await new QueryRoot(db).iter(logsStore).toArray();
+}
+
+export async function record(level: Level, msg: string, source?: string, line?: number, col?: number): Promise<void> {
+  if (typeof indexedDB === "undefined") {
+    return;
+  }
+  if (!db) {
+    db = await openLoggingDb();
+  }
+
+  let count = await new QueryRoot(db).count(logsStore);
+
+  console.log("count is", count);
+
+  if (count > 1000) {
+    await new QueryRoot(db).deleteIf(logsStore, (e, i) => (i < 200));
+  }
+
+  let entry: LogEntry = {
+    timestamp: new Date().getTime(),
+    level,
+    msg,
+    source,
+    line,
+    col,
+  };
+  await new QueryRoot(db).put(logsStore, entry);
+}
+
+const loggingDbVersion = 1;
+
+const logsStore: Store<LogEntry> = new Store<LogEntry>("logs");
+
+export function openLoggingDb(): Promise<IDBDatabase> {
+  return new Promise((resolve, reject) => {
+    const req = indexedDB.open("taler-logging", loggingDbVersion);
+    req.onerror = (e) => {
+      reject(e);
+    };
+    req.onsuccess = (e) => {
+      resolve(req.result);
+    };
+    req.onupgradeneeded = (e) => {
+      const db = req.result;
+      if (e.oldVersion != 0) {
+        try {
+          db.deleteObjectStore("logs");
+        } catch (e) {
+          console.error(e);
+        }
+      }
+      db.createObjectStore("logs", {keyPath: "id", autoIncrement: true});
+    };
+  });
+}
+
+export const info = makeInfo();
+export const debug = makeDebug();
+export const warn = makeWarn();
+export const error = makeError();
diff --git a/src/pages/logs.html b/src/pages/logs.html
new file mode 100644
index 000000000..8d35bcbd7
--- /dev/null
+++ b/src/pages/logs.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+
+<head>
+	<title>Taler Wallet: Logs</title>
+
+	<link rel="stylesheet" type="text/css" href="../style/lang.css">
+	<link rel="stylesheet" type="text/css" href="../style/wallet.css">
+
+	<link rel="icon" href="/img/icon.png">
+
+	<script src="/src/vendor/URI.js"></script>
+	<script src="/src/vendor/react.js"></script>
+	<script src="/src/vendor/react-dom.js"></script>
+
+	<!-- i18n -->
+	<script src="/src/vendor/jed.js"></script>
+	<script src="/src/i18n.js"></script>
+	<script src="/src/i18n/strings.js"></script>
+
+	<script src="/src/vendor/system-csp-production.src.js"></script>
+	<script src="/src/module-trampoline.js"></script>
+
+	<style>
+		.tree-item {
+			margin: 2em;
+			border-radius: 5px;
+			border: 1px solid gray;
+			padding: 1em;
+		}
+	</style>
+
+        <body>
+          <div id="container"></div>
+        </body>
+</html>
diff --git a/src/pages/logs.tsx b/src/pages/logs.tsx
new file mode 100644
index 000000000..f971f3f85
--- /dev/null
+++ b/src/pages/logs.tsx
@@ -0,0 +1,76 @@
+/*
+ This file is part of TALER
+ (C) 2016 Inria
+
+ TALER is free software; you can redistribute it and/or modify it under the
+ terms of the GNU General Public License as published by the Free Software
+ Foundation; either version 3, or (at your option) any later version.
+
+ TALER is distributed in the hope that it will be useful, but WITHOUT ANY
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along with
+ TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+ */
+
+/**
+ * Show wallet logs.
+ *
+ * @author Florian Dold
+ */
+
+import {LogEntry, getLogs} from "src/logging";
+
+interface LogViewProps {
+  log: LogEntry;
+}
+
+class LogView extends React.Component<LogViewProps, void> {
+  render(): JSX.Element {
+    let e = this.props.log;
+    return (
+      <div className="tree-item">
+        <ul>
+          <li>id: {e.id || "unknown"}</li>
+          <li>msg: {e.msg}</li>
+          <li>file: {e.source || "(unknown)"}</li>
+        </ul>
+      </div>
+    );
+  }
+}
+
+interface LogsState {
+  logs: LogEntry[]|undefined;
+}
+
+class Logs extends React.Component<any, LogsState> {
+  constructor() {
+    super();
+    this.update();
+    this.state = {} as any;
+  }
+
+  async update() {
+    let logs = await getLogs();
+    this.setState({logs});
+  }
+
+  render(): JSX.Element {
+    let logs = this.state.logs;
+    if (!logs) {
+      return <span>...</span>;
+    }
+    return (
+      <div className="tree-item">
+        Logs:
+        {logs.map(e => <LogView log={e} />)}
+      </div>
+    );
+  }
+}
+
+export function main() {
+  ReactDOM.render(<Logs />, document.getElementById("container")!);
+}
diff --git a/src/popup/popup.tsx b/src/popup/popup.tsx
index 711650bc3..e9fa6a87b 100644
--- a/src/popup/popup.tsx
+++ b/src/popup/popup.tsx
@@ -492,6 +492,9 @@ function WalletDebug(props: any) {
     <button onClick={openExtensionPage("/src/pages/tree.html")}>
       show tree
     </button>
+    <button onClick={openExtensionPage("/src/pages/logs.html")}>
+      show logs
+    </button>
     <br />
     <button onClick={confirmReset}>
       reset
diff --git a/src/query.ts b/src/query.ts
index f3ce0d764..f8a6255b4 100644
--- a/src/query.ts
+++ b/src/query.ts
@@ -38,9 +38,9 @@ export interface JoinLeftResult<L,R> {
 export class Store<T> {
   name: string;
   validator?: (v: T) => T;
-  storeParams: IDBObjectStoreParameters;
+  storeParams?: IDBObjectStoreParameters;
 
-  constructor(name: string, storeParams: IDBObjectStoreParameters,
+  constructor(name: string, storeParams?: IDBObjectStoreParameters,
               validator?: (v: T) => T) {
     this.name = name;
     this.validator = validator;
@@ -450,6 +450,43 @@ export class QueryRoot implements PromiseLike<void> {
     return new IterQueryStream(this, store.name, {});
   }
 
+  count<T>(store: Store<T>): Promise<number> {
+    const {resolve, promise} = openPromise();
+
+    const doCount = (tx: IDBTransaction) => {
+      const s = tx.objectStore(store.name);
+      const req = s.count();
+      req.onsuccess = () => {
+        resolve(req.result);
+      };
+    }
+
+    this.addWork(doCount, store.name, false);
+    return Promise.resolve()
+                  .then(() => this.finish())
+                  .then(() => promise);
+
+  }
+
+  deleteIf<T>(store: Store<T>, predicate: (x: T, n: number) => boolean): QueryRoot {
+    const doDeleteIf = (tx: IDBTransaction) => {
+      const s = tx.objectStore(store.name);
+      const req = s.openCursor();
+      let n = 0;
+      req.onsuccess = () => {
+        let cursor: IDBCursorWithValue = req.result;
+        if (cursor) {
+          if (predicate(cursor.value, n++)) {
+            cursor.delete();
+          }
+          cursor.continue();
+        } 
+      }
+    };
+    this.addWork(doDeleteIf, store.name, true);
+    return this;
+  }
+
   iterIndex<S extends IDBValidKey,T>(index: Index<S,T>,
                                      only?: S): QueryStream<T> {
     this.stores.add(index.storeName);
diff --git a/src/wxBackend.ts b/src/wxBackend.ts
index c0a31cb63..6667fe47b 100644
--- a/src/wxBackend.ts
+++ b/src/wxBackend.ts
@@ -30,6 +30,7 @@ import { Notifier } from "./types";
 import { Contract } from "./types";
 import MessageSender = chrome.runtime.MessageSender;
 import { ChromeBadge } from "./chromeBadge";
+import * as logging from "./logging";
 
 "use strict";
 
@@ -413,6 +414,7 @@ function handleBankRequest(wallet: Wallet, headerList: chrome.webRequest.HttpHea
 // Useful for debugging ...
 export let wallet: Wallet | undefined = undefined;
 export let badge: ChromeBadge | undefined = undefined;
+export let log = logging.log;
 
 // Rate limit cache for executePayment operations, to break redirect loops
 let rateLimitCache: { [n: number]: number } = {};
@@ -422,6 +424,10 @@ function clearRateLimitCache() {
 }
 
 export function wxMain() {
+  window.onerror = (m, source, lineno, colno, error) => {
+    logging.record("error", m + error, source || "(unknown)", lineno || 0, colno || 0);
+  }
+
   chrome.browserAction.setBadgeText({ text: "" });
   badge = new ChromeBadge();
 
diff --git a/tsconfig.json b/tsconfig.json
index e79ad03ce..13ad926c8 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -16,14 +16,14 @@
     "src/checkable.ts",
     "decl/lib.es6.d.ts",
     "src/chromeBadge.ts",
-    "decl/urijs/URIjs.d.ts",
     "src/cryptoApi-test.ts",
+    "decl/urijs/URIjs.d.ts",
     "src/components.ts",
-    "decl/systemjs/systemjs.d.ts",
     "src/emscriptif-test.ts",
+    "decl/systemjs/systemjs.d.ts",
     "src/cryptoApi.ts",
-    "decl/react-global.d.ts",
     "src/helpers-test.ts",
+    "decl/react-global.d.ts",
     "src/cryptoLib.ts",
     "src/types-test.ts",
     "decl/chrome/chrome.d.ts",
@@ -32,6 +32,7 @@
     "src/emscriptif.ts",
     "src/helpers.ts",
     "src/http.ts",
+    "src/logging.ts",
     "src/query.ts",
     "src/taler-wallet-lib.ts",
     "src/types.ts",
@@ -46,6 +47,7 @@
     "src/pages/show-db.ts",
     "src/pages/confirm-contract.tsx",
     "src/pages/confirm-create-reserve.tsx",
+    "src/pages/logs.tsx",
     "src/pages/tree.tsx",
     "src/popup/popup.tsx"
   ]
-- 
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