Page action assigns site to a container and simultaneously reopens site in container.

src/js/utils.js

@@ -1,7 +1,7 @@
 const DEFAULT_FAVICON = "/img/blank-favicon.svg";
 
 // TODO use export here instead of globals
-window.Utils = {
+const Utils = {
 
   createFavIconElement(url) {
     const imageElement = document.createElement("img");
@@ -18,6 +18,90 @@ window.Utils = {
     imageElement.addEventListener("error", errorListener);
     imageElement.addEventListener("load", loadListener);
     return imageElement;
+  },
+  /**
+ * Escapes any occurances of &, ", <, > or / with XML entities.
+ *
+ * @param {string} str
+ *        The string to escape.
+ * @return {string} The escaped string.
+ */
+  escapeXML(str) {
+    const replacements = { "&": "&amp;", "\"": "&quot;", "'": "&apos;", "<": "&lt;", ">": "&gt;", "/": "&#x2F;" };
+    return String(str).replace(/[&"'<>/]/g, m => replacements[m]);
+  },
+
+  /**
+ * A tagged template function which escapes any XML metacharacters in
+ * interpolated values.
+ *
+ * @param {Array<string>} strings
+ *        An array of literal strings extracted from the templates.
+ * @param {Array} values
+ *        An array of interpolated values extracted from the template.
+ * @returns {string}
+ *        The result of the escaped values interpolated with the literal
+ *        strings.
+ */
+  escaped(strings, ...values) {
+    const result = [];
+
+    for (const [i, string] of strings.entries()) {
+      result.push(string);
+      if (i < values.length)
+        result.push(this.escapeXML(values[i]));
+    }
+
+    return result.join("");
+  },
+
+  async currentTab() {
+    const activeTabs = await browser.tabs.query({ active: true, windowId: browser.windows.WINDOW_ID_CURRENT });
+    if (activeTabs.length > 0) {
+      return activeTabs[0];
+    }
+    return false;
+  },
+  
+  addEnterHandler(element, handler) {
+    element.addEventListener("click", (e) => {
+      handler(e);
+    });
+    element.addEventListener("keydown", (e) => {
+      if (e.keyCode === 13) {
+        e.preventDefault();
+        handler(e);
+      }
+    });
+  },
+
+  userContextId(cookieStoreId = "") {
+    const userContextId = cookieStoreId.replace("firefox-container-", "");
+    return (userContextId !== cookieStoreId) ? Number(userContextId) : false;
+  },
+
+  setOrRemoveAssignment(tabId, url, userContextId, value) {
+    return browser.runtime.sendMessage({
+      method: "setOrRemoveAssignment",
+      tabId,
+      url,
+      userContextId,
+      value
+    });
+  },
+
+  reloadInContainer(url, currentUserContextId, newUserContextId, tabIndex, active) {
+    return browser.runtime.sendMessage({
+      method: "reloadInContainer",
+      url, 
+      currentUserContextId, 
+      newUserContextId, 
+      tabIndex, 
+      active
+    });
   }
 
 };
+
+
+window.Utils = Utils;