Keep a list of log lines. Send javascript errors up to the server.

app/assets/javascripts/dtu_core/client_debug.js

@@ -10,7 +10,7 @@ var ClientDebug = {
     var packet = {
       level: level,
       message: message
-    }
+    };
 
     $.ajax({
         method: "PUT",

app/assets/javascripts/dtu_core/report_a_bug.coffee

+window.ConsoleBuffer = {
+  current_row: 0
+  rows: new Array(500)
+  log: (message) ->
+    window.ConsoleBuffer.rows[window.ConsoleBuffer.current_row] = message
+    window.ConsoleBuffer.current_row = window.ConsoleBuffer.current_row % window.ConsoleBuffer.rows.length
+  nonNilRows: () ->
+    return window.ConsoleBuffer.rows.filter (x) ->
+      return x
+}
+
 window.reportABug = (ev) ->
   console.log("Report a Bug")
-  ClientDebug.send('info', {msg: "Report a bug triggered ", location: window.location} )
+  ClientDebug.send('error', { type: 'user-generated', msg: "Report a bug triggered ", location: window.location.href, logs: window.ConsoleBuffer.nonNilRows() } )
+
+window.onerror = (msg, url, lineNo, columnNo, error) ->
+  ClientDebug.send('error', { type: 'window.onerror', url: url, lineNo: lineNo, columnNo: columnNo, message: msg, error: error, location: document.location.href, logs: window.ConsoleBuffer.nonNilRows() } )
+  return false
 
+do ->
+  kinds = ['log', 'warn', 'error', 'info']
+  for kind in kinds
+    oldLog = console[kind]
+    if typeof oldLog is 'function' 
+      console[kind] = (message) ->
+        ConsoleBuffer.log({kind: kind, message: message})
+        oldLog.apply(console, arguments)