refactor: split editor in JS modules

editor/public/static/js/index.js

@@ -0,0 +1,31 @@
+function addOptions(files) {
+    const select = document.getElementById("file-sel")
+    select.innerHTML = ""
+    const defaultOpt = document.createElement("option")
+    defaultOpt.innerText = "----- Select a file -----"
+    defaultOpt.value = ""
+    select.appendChild(defaultOpt)
+    files.forEach(file => {
+        const option = document.createElement("option")
+        option.innerText = file
+        option.value = file
+        select.appendChild(option)
+    })
+}
+
+function selectFile(event) {
+    const file = event.target.value
+    if (file !== "") {
+        const url = new URL("/edit/", window.location.origin)
+        url.searchParams.set("f", file)
+        window.location.href = url.href
+    }
+}
+
+window.addEventListener("load", () => {
+    fetch("/api/files").then(res => {
+        return res.json()
+    }).then(files => {
+        addOptions(files)
+    })
+})