Merge pull request #1444 from scireum/feature/sbi/SIRI-987

Shortens encoded deeplink URL parameter value

src/main/resources/default/assets/common/scripts/continuity.js.pasta

@@ -333,32 +333,27 @@ window.sirius.Continuity = (function () {
         }
 
         const paramStateText = JSON.stringify(paramState);
-        return this.options.encodeStateParameter ? convertToBinary(paramStateText) : paramStateText;
+        return this.options.encodeStateParameter ? btoa(paramStateText) : paramStateText;
     };
 
-    /**@
-     * Converts the given UTF-8 text to a binary base64 encoded representation.
-     *
-     * @param string the text to encode
-     * @returns {string} the binary base64 encoded representation of the text
-     */
-    function convertToBinary(string) {
-        const codeUnits = new Uint16Array(string.length);
-        for (let i = 0; i < codeUnits.length; i++) {
-            codeUnits[i] = string.charCodeAt(i);
-        }
-        return btoa(String.fromCharCode.apply(this, new Uint8Array(codeUnits.buffer)));
-    }
-
     /**@
      * Parses the value of our history state deep-link parameter from the URL and transforms it into a JS Object.
      *
      * @param {string} param the value of the parameter to parse
      * @returns {Object} the history state as an object
      */
     Continuity.prototype.parseStateUrlParam = function (param) {
-        const paramStateText = this.options.encodeStateParameter ? convertFromBinary(param) : param;
-        return JSON.parse(paramStateText);
+        if (!this.options.encodeStateParameter) {
+            return JSON.parse(param);
+        }
+        try {
+            // Try to decode the new binary format first.
+            return JSON.parse(atob(param));
+        } catch (exception) {
+            // If the new format fails, try to decode the old legacy format.
+            // When this also fails we throw the exception.
+            return JSON.parse(convertFromLegacyBinary(param));
+        }
     };
 
     /**@
@@ -367,7 +362,7 @@ window.sirius.Continuity = (function () {
      * @param string the binary base64 encoded representation of a text
      * @returns {string} the original text
      */
-    function convertFromBinary(encoded) {
+    function convertFromLegacyBinary(encoded) {
         const binary = atob(encoded);
         const bytes = new Uint8Array(binary.length);
         for (let i = 0; i < bytes.length; i++) {