working version checkin

*  add config class
*  add vlookup
*  add menu
*  add photo folder creation
*  add prep for product templates

src/createMissingPhotoFolders.ts

@@ -0,0 +1,49 @@
+function createMissingPhotoFolders() {
+  let ss = SpreadsheetApp.getActive()
+  let s = ss.getSheetByName("product_inventory")
+  let config = new Config()
+  let photoParent = DriveApp.getFolderById(config.productPhotosFolderId)
+  let skus = getColumnValuesByName(s, "sku")
+  let photoLinks = getColumnValuesByName(s, "photos")
+  let created: string[] = []
+
+  let folderItr = photoParent.getFolders()
+  let folderNames: string[] = []
+  console.log("getting list of existing folders...")
+  while (folderItr.hasNext()) {
+    let folder = folderItr.next()
+    folderNames.push(folder.getName())
+  }
+  console.log("existing folders: " + folderNames.join(", "))
+
+  for (let i = 0; i < skus.length; i++) {
+    let sku = String(skus[i][0])
+    let updateLink: boolean = false
+    if (null == sku || sku == "") {
+      continue
+    }
+    if (folderNames.includes(sku)) {
+      console.log("folder '" + sku + "' already exists")
+    } else {
+      console.log("creating folder '" + skus[i] + "'")
+      photoParent.createFolder(sku)
+      created.push(sku)
+      updateLink = true
+    }
+
+    // Update photos cell
+    if (photoLinks[i][0] != "" && !updateLink) {
+      continue
+    }
+    console.log("updating photos cell for '" + sku + "'")
+    let photosCell = getCellRangeByColumnName(s, "photos", i + 2)
+    let folder = photoParent.getFoldersByName(sku).next()
+    let url = folder.getUrl()
+    let linkValue = SpreadsheetApp.newRichTextValue()
+      .setText(sku)
+      .setLinkUrl(url)
+      .build()
+    photosCell.setRichTextValue(linkValue)
+  }
+  toastAndLog("created " + created.length + " folders: " + created.join(", "))
+}