fix: user uploaded themes are now stored in the config directory. Missing directories will be created and added docs for theming

src/pages/settings/theming.ts

@@ -0,0 +1,55 @@
+import fs from "fs";
+
+const cssFilter = (file: string) => file.endsWith(".css");
+const sort = (a: string, b: string) => a.toLowerCase().localeCompare(b.toLowerCase());
+
+/**
+ * Create an "options header" (disabled option) based on a bit of text
+ * @param text of the header
+ * @returns
+ */
+export const getOptionsHeader = (text: string): HTMLOptionElement => {
+  const opt = new Option(text, undefined, false, false);
+  opt.disabled = true;
+  return opt;
+};
+
+/**
+ * Maps a list of filenames to a list of HTMLOptionElements
+ * Will strip ".css" from the name but keeps it in the value
+ * @param array array of filenames
+ * @returns
+ */
+export const getOptions = (array: string[]) => {
+  return array.map((name) => {
+    return new Option(name.replace(".css", ""), name);
+  });
+};
+
+/**
+ * Read .css files from a directory and return them in a sorted array.
+ * @param directory to read from. Will be created if it doesn't exist
+ * @returns
+ */
+export const getThemeListFromDirectory = (directory: string) => {
+  try {
+    makeUserThemesDirectory(directory);
+    return fs.readdirSync(directory).filter(cssFilter).sort(sort);
+  } catch (err) {
+    console.error(err);
+  }
+};
+
+/**
+ * Create the directory to store user themes in
+ * @param directory directory to create
+ */
+export const makeUserThemesDirectory = (directory: string) => {
+  try {
+    fs.mkdir(directory, { recursive: true }, (err) => {
+      if (err) throw err;
+    });
+  } catch (err) {
+    console.error(err);
+  }
+};