added click to the print button

contentscript.js

@@ -6,24 +6,42 @@ function extractUrlsAndFilenames() {
   let frame = document.querySelector("iframe.js-mail-content");
 
   // get all divs containing attachments
-  let divs = frame.contentWindow.document.body.querySelectorAll("div.samoware-mail-message__attach__item[attachment-ref]"); 
+  let divs = frame.contentWindow.document.body.querySelectorAll(
+    "div.samoware-mail-message__attach__item[attachment-ref]"
+  );
 
   // loop over divs and extract attachment information
-  let urlsAndFilenames = []
+  let urlsAndFilenames = [];
-  divs.forEach(div => {
+  divs.forEach((div) => {
     let url = div.getAttribute("attachment-ref");
     let filename = div.getAttribute("file-name");
 
     // if filename is null, derive it from url
-    if ( ! filename ) {
+    if (!filename) {
       let splitUrl = url.split("/");
-      filename = splitUrl[splitUrl.length-1];
+      filename = splitUrl[splitUrl.length - 1];
     }
-    urlsAndFilenames.push({url: url, filename: filename});
+    urlsAndFilenames.push({ url: url, filename: filename });
-  })
+  });
   return urlsAndFilenames;
 }
 
+function clickPrintButton() {
+  let printElement = document.querySelector(
+    'li[ng-click="printMessage(selectedMessage)"]'
+  );
+  printElement.click();
+}
+
 const urlsAndFilenames = extractUrlsAndFilenames();
-console.log(`contentscript.js: done; found ${JSON.stringify(urlsAndFilenames)}`);
+console.log(
+  `contentscript.js: URLs and filenames extracted ->  ${JSON.stringify(
+    urlsAndFilenames
+  )}`
+);
+
+clickPrintButton();
+console.log(`contentscript.js: clicked the print button`);
+
+// this last statement is important – it's evaluation value is the return value for the background script
 urlsAndFilenames;