1 files changed, 111 insertions, 0 deletions
diff --git a/devtools/client/debugger/src/actions/utils/middleware/log.js b/devtools/client/debugger/src/actions/utils/middleware/log.js
new file mode 100644
index 0000000000..b9592ce22c
--- /dev/null
+++ b/devtools/client/debugger/src/actions/utils/middleware/log.js
@@ -0,0 +1,111 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+import flags from "devtools/shared/flags";
+import { prefs } from "../../../utils/prefs";
+
+const ignoreList = [
+  "ADD_BREAKPOINT_POSITIONS",
+  "SET_SYMBOLS",
+  "OUT_OF_SCOPE_LOCATIONS",
+  "MAP_SCOPES",
+  "MAP_FRAMES",
+  "ADD_SCOPES",
+  "IN_SCOPE_LINES",
+  "REMOVE_BREAKPOINT",
+  "NODE_PROPERTIES_LOADED",
+  "SET_FOCUSED_SOURCE_ITEM",
+  "NODE_EXPAND",
+  "IN_SCOPE_LINES",
+  "SET_PREVIEW",
+];
+
+function cloneAction(action) {
+  action = action || {};
+  action = { ...action };
+
+  // ADD_TAB, ...
+  if (action.source?.text) {
+    const source = { ...action.source, text: "" };
+    action.source = source;
+  }
+
+  if (action.sources) {
+    const sources = action.sources.slice(0, 20).map(source => {
+      const url = !source.url || source.url.includes("data:") ? "" : source.url;
+      return { ...source, url };
+    });
+    action.sources = sources;
+  }
+
+  // LOAD_SOURCE_TEXT
+  if (action.text) {
+    action.text = "";
+  }
+
+  if (action.value?.text) {
+    const value = { ...action.value, text: "" };
+    action.value = value;
+  }
+
+  return action;
+}
+
+function formatPause(pause) {
+  return {
+    ...pause,
+    pauseInfo: { why: pause.why },
+    scopes: [],
+    loadedObjects: [],
+  };
+}
+
+function serializeAction(action) {
+  try {
+    action = cloneAction(action);
+    if (ignoreList.includes(action.type)) {
+      action = {};
+    }
+
+    if (action.type === "PAUSED") {
+      action = formatPause(action);
+    }
+
+    const serializer = function (key, value) {
+      // Serialize Object/LongString fronts
+      if (value?.getGrip) {
+        return value.getGrip();
+      }
+      return value;
+    };
+
+    // dump(`> ${action.type}...\n ${JSON.stringify(action, serializer)}\n`);
+    return JSON.stringify(action, serializer);
+  } catch (e) {
+    console.error(e);
+    return "";
+  }
+}
+
+/**
+ * A middleware that logs all actions coming through the system
+ * to the console.
+ */
+export function log({ dispatch, getState }) {
+  return next => action => {
+    const asyncMsg = !action.status ? "" : `[${action.status}]`;
+
+    if (prefs.logActions) {
+      if (flags.testing) {
+        dump(
+          `[ACTION] ${action.type} ${asyncMsg} - ${serializeAction(action)}\n`
+        );
+      } else {
+        console.log(action, asyncMsg);
+      }
+    }
+
+    next(action);
+  };
+}