Create tokensInTemplate.js

tokensInTemplate.js

@@ -0,0 +1,28 @@
+/**
+ * Replace token defined in args in HTML template
+ * The tokens must be provided in form { token1name: 'token1Value', token2Name: 'token2Value' ...}
+ *
+ * @param {*} filename
+ * @param {...{}} args
+ * @returns {*}
+ */
+function tokensInTemplate(filename, ...args) {
+  // Ensure the first argument is a string
+  if (typeof filename !== 'string') {
+    throw new Error('First argument must be a string; be sure to write the template name correctly, without ending .html');
+  }
+
+  // Merge all objects into one
+  let replacements = Object.assign({}, ...args);
+
+  // Create a template from a file
+  let template = HtmlService.createTemplateFromFile(filename);
+
+  // Replace tokens in the template with replacements
+  for (let key in replacements) {
+    template[key] = replacements[key];
+  }
+
+  // Evaluate the template and return the result
+  return template.evaluate().getContent();
+}