feat: facilitate webview dependencies

Signed-off-by: Infi <infi@infi.sh>

.gitignore

@@ -18,3 +18,4 @@ local.properties
 revoltbuild.properties
 sentry.properties
 /.kotlin/sessions
+app/src/main/assets/embedded

docs/src/content/docs/contributing/setup.mdx

@@ -78,7 +78,11 @@ import { Tabs, TabItem, Steps } from "@astrojs/starlight/components"
 
     </Tabs>
 
-3.  Clone the repository.
+3.  Download [Deno](https://deno.com).
+
+    _Please see the [Deno Runtime Manual](https://docs.deno.com/runtime/getting_started/installation/) for installation guidance._
+
+4.  Clone the repository.
 
     ```sh
     git clone --recursive https://github.com/revoltchat/android.git
@@ -86,16 +90,22 @@ import { Tabs, TabItem, Steps } from "@astrojs/starlight/components"
 
     Specify `--recursive` to ensure that submodules are cloned as well.
 
-4.  Open the project in Android Studio.
+5.  Open the project in Android Studio.
 
-5.  Install the required dependencies.
+6.  Install the required dependencies.
 
     -   Android SDK, latest version
     -   Android NDK, latest version
 
     You can install these from the SDK Manager in Android Studio.
 
-6.  Copy the `revoltbuild.properties.example` file to `revoltbuild.properties` and fill in the required values.
+7.  Download required additional, embedded dependencies using the provided script.
+
+    ```sh
+    deno run -A scripts/download_deps.ts
+    ```
+
+8.  Copy the `revoltbuild.properties.example` file to `revoltbuild.properties` and fill in the required values.
 
     ```sh
     cp revoltbuild.properties.example revoltbuild.properties
@@ -110,7 +120,7 @@ import { Tabs, TabItem, Steps } from "@astrojs/starlight/components"
     | `build.debug.app_name`   | The name of the app in debug builds, arbitrary |
     | `build.flavour_id`       | Leave as `ZZUU`                                |
 
-7.  Copy the `sentry.properties.example` file to `sentry.properties` and fill in the required values.
+9.  Copy the `sentry.properties.example` file to `sentry.properties` and fill in the required values.
 
     ```sh
     cp sentry.properties.example sentry.properties
@@ -127,11 +137,11 @@ import { Tabs, TabItem, Steps } from "@astrojs/starlight/components"
 
     You can get these values from the Sentry dashboard.
 
-8.  Build the project.
+10. Build the project.
 
     You can build the project by clicking on the 'Run' button in Android Studio.  
     If asked, build the `:app` module.
 
-9.  **You're all set!** You can now start contributing to Revolt on Android.
+11. **You're all set!** You can now start contributing to Revolt on Android.
 
 </Steps>

scripts/download_deps.ts

@@ -0,0 +1,71 @@
+import { resolve } from "jsr:@std/path"
+
+const outputFolderParent = resolve(Deno.cwd(), "app", "src", "main", "assets")
+
+try {
+    Deno.statSync(outputFolderParent)
+} catch (_) {
+    console.error(
+        "\x1b[31m" + // red
+            "Did you run this script from the correct directory?" +
+            "\x1b[0m"
+    )
+    console.error(
+        "Usage: " +
+            "\x1b[35m" + // magenta
+            "deno run -A scripts/download_deps.ts" +
+            "\x1b[0m" +
+            " from the " +
+            "\x1b[1;31;4m" + // bold red underline
+            "root" +
+            "\x1b[0m" +
+            " directory of the project."
+    )
+    Deno.exit(1)
+}
+
+const outputFolder = resolve(outputFolderParent, "embedded")
+
+// If it exists, delete it
+try {
+    Deno.removeSync(outputFolder, { recursive: true })
+} catch (_) {
+    // Ignore, might not exist
+}
+
+// Create the output folder
+Deno.mkdirSync(outputFolder, { recursive: true })
+
+const deps = [
+    {
+        file: "katex.min.css",
+        url: "https://cdn.jsdelivr.net/npm/katex@0.16.19/dist/katex.min.css",
+    },
+    {
+        file: "katex.min.js",
+        url: "https://cdn.jsdelivr.net/npm/katex@0.16.19/dist/katex.min.js",
+    },
+    {
+        file: "micromark.bundle.js",
+        url: "https://esm.sh/v135/micromark@4.0.1/es2022/micromark.bundle.mjs",
+    },
+]
+
+console.log("Will download the following files:")
+for (const dep of deps) {
+    console.log(`- ${dep.file} from ${dep.url}`)
+}
+if (!confirm("Continue?")) {
+    console.log("Aborted.")
+    Deno.exit(0)
+}
+
+for (const dep of deps) {
+    const response = await fetch(dep.url)
+    const data = await response.arrayBuffer()
+    const file = resolve(outputFolder, dep.file)
+    Deno.writeFileSync(file, new Uint8Array(data))
+    console.log(`Downloaded ${dep.file} to ${file}`)
+}
+
+console.log("Done.")