1 files changed, 127 insertions, 0 deletions
diff --git a/addons/mail/static/src/utils/utils.js b/addons/mail/static/src/utils/utils.js
new file mode 100644
index 00000000000..da0855437f7
--- /dev/null
+++ b/addons/mail/static/src/utils/utils.js
@@ -0,0 +1,127 @@
+odoo.define('mail/static/src/utils/utils.js', function (require) {
+'use strict';
+
+const { delay } = require('web.concurrency');
+const {
+    patch: webUtilsPatch,
+    unpatch: webUtilsUnpatch,
+} = require('web.utils');
+
+//------------------------------------------------------------------------------
+// Public
+//------------------------------------------------------------------------------
+
+const classPatchMap = new WeakMap();
+
+/**
+ * Wait a task tick, so that anything in micro-task queue that can be processed
+ * is processed.
+ */
+async function nextTick() {
+    await delay(0);
+}
+
+/**
+ * Inspired by web.utils:patch utility function
+ *
+ * @param {Class} Class
+ * @param {string} patchName
+ * @param {Object} patch
+ * @returns {function} unpatch function
+ */
+function patchClassMethods(Class, patchName, patch) {
+    let metadata = classPatchMap.get(Class);
+    if (!metadata) {
+        metadata = {
+            origMethods: {},
+            patches: {},
+            current: []
+        };
+        classPatchMap.set(Class, metadata);
+    }
+    if (metadata.patches[patchName]) {
+        throw new Error(`Patch [${patchName}] already exists`);
+    }
+    metadata.patches[patchName] = patch;
+    applyPatch(Class, patch);
+    metadata.current.push(patchName);
+
+    function applyPatch(Class, patch) {
+        Object.keys(patch).forEach(function (methodName) {
+            const method = patch[methodName];
+            if (typeof method === "function") {
+                const original = Class[methodName];
+                if (!(methodName in metadata.origMethods)) {
+                    metadata.origMethods[methodName] = original;
+                }
+                Class[methodName] = function (...args) {
+                    const previousSuper = this._super;
+                    this._super = original;
+                    const res = method.call(this, ...args);
+                    this._super = previousSuper;
+                    return res;
+                };
+            }
+        });
+    }
+
+    return () => unpatchClassMethods.bind(Class, patchName);
+}
+
+/**
+ * @param {Class} Class
+ * @param {string} patchName
+ * @param {Object} patch
+ * @returns {function} unpatch function
+ */
+function patchInstanceMethods(Class, patchName, patch) {
+    return webUtilsPatch(Class, patchName, patch);
+}
+
+/**
+ * Inspired by web.utils:unpatch utility function
+ *
+ * @param {Class} Class
+ * @param {string} patchName
+ */
+function unpatchClassMethods(Class, patchName) {
+    let metadata = classPatchMap.get(Class);
+    if (!metadata) {
+        return;
+    }
+    classPatchMap.delete(Class);
+
+    // reset to original
+    for (let k in metadata.origMethods) {
+        Class[k] = metadata.origMethods[k];
+    }
+
+    // apply other patches
+    for (let name of metadata.current) {
+        if (name !== patchName) {
+            patchClassMethods(Class, name, metadata.patches[name]);
+        }
+    }
+}
+
+/**
+ * @param {Class} Class
+ * @param {string} patchName
+ */
+function unpatchInstanceMethods(Class, patchName) {
+    return webUtilsUnpatch(Class, patchName);
+}
+
+//------------------------------------------------------------------------------
+// Export
+//------------------------------------------------------------------------------
+
+return {
+    nextTick,
+    patchClassMethods,
+    patchInstanceMethods,
+    unpatchClassMethods,
+    unpatchInstanceMethods,
+};
+
+});