get theme list frontend fn

src/utils/themes.ts

@@ -0,0 +1,49 @@
+import { invoke } from '@tauri-apps/api'
+
+interface Theme {
+  name: string
+  version: string
+  description: string
+
+  // Included custom CSS and JS files
+  includes: {
+    css: string[]
+    js: string[]
+  }
+
+  customBackgroundURL?: string
+  customBackgroundPath?: string
+}
+
+interface BackendThemeList {
+  json: string
+  path: string
+}
+
+interface ThemeList extends Theme {
+  path: string
+}
+
+export async function getThemeList() {
+  // Do some invoke to backend to get the theme list
+  const themes = await invoke('get_theme_list') as BackendThemeList[]
+  const list: ThemeList[] = []
+
+  themes.forEach(t => {
+    let obj
+
+    try {
+      obj = JSON.parse(t.json)
+    } catch (e) {
+      console.error(e)
+    }
+
+    list.push({ ...obj, path: t.path })
+  })
+
+  return list
+}
+
+export async function loadTheme(theme: string) {
+  // Do some invoke to backend to load the theme
+}