feat: Allow installing PRs from DeveloperView (#139)

* feat: Initial backend code to get list of PRs

Hardcoded for launcher right now

* refactor: Autogen TS bindings from Rust code
using `ts-rs` as done in #140

* fix: Fix incorrect typing

What is returned is actually an array of `PullsApiResponseElement`

* feat: Prototyping frontend UI for installing PR

* fix: Use right repo

Used Mods instead of Launcher

* feat: Enable installing launcher pull request

* refactor: Rename variables to indicate approp repo

NorthstarLauncher vs NorthstarMods

* style: Formatting fixes

* feat: Initial code for getting mods PRs

* feat: Add backend code for installing mods PRs

* feat: Add note about launching in notification

* fix: Remove commented out code

* refactor: Depduplicate code

* refactor: Remove unnecessary use of anyhow

* refactor: Use already existing function
for checking game path

* feat: Add comment about profile / batch file

* chore: Remove leftover print statements

* feat: Add clickable link for each PR

* refactor: Reduce duplicate code

* refactor: Rename enum

* fix: Use proper type

* fix: Remove leftover `console.log`s

* style: Revert accidental formatting change

* refactor: Remove second API call for mods PRs

* refactor: Rename variable

* refactor: Remove second API call for launcher PRs

* refactor: Move API URL string to `constants.rs`

So that all constants are in a single place

* fix: Restore lines deleted in merge

* style: Formatting fixes

* fix: Print line when done installing PR

* feat: Show notification for install start/done

Displays a notification that PR install has started and upon completion
replaces it with one saying that install has completed.

* fix: Remove left-over console log

* feat: "Install PR" UI (#197)

* refactor: export pull requests selector to dedicated component

* refactor: regroup launcher+mods collapses in one collapse component

* refactor: load pull requests when opening selector collapse item

* refactor: review progress loaders' style

* fix: don't fetch PRs if they've already been loaded

* feat: update collapse style

* refactor: remove fetch success notification

* refactor: both collapses can be opened at the same time

* fix: non-accordion collapse sends an object as event parameter

* fix: Iterate over multiple pages of GitHub CI API
This ensures we can still grab older artifacts.

Max page is capped at 10 as going too high will cause us to hit API rate
limits.

Also refined error message accordingly.

* refactor: Move stored PRs to submodule
as suggested in review

* refactor: Move getPullRequests to store submodule

I order to clean up PullRequestSelector.vue

Other functions will follow in separate commits.

Currently TypeScript compilation fails on undefined type of `state`

* fix: Properly define state type

* refactor: Move installLauncherPR to store submodule

* refactor: Move installModsPR to store submodule

---------

Co-authored-by: Rémy Raes <contact@remyraes.com>

9 files changed, 472 insertions, 1 deletions

diff --git a/src-tauri/bindings/CommitHead.ts b/src-tauri/bindings/CommitHead.ts
new file mode 100644
index 00000000..58f31657
--- /dev/null
+++ b/src-tauri/bindings/CommitHead.ts
@@ -0,0 +1,4 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { Repo } from "./Repo";
+
+export interface CommitHead { sha: string, ref: string, repo: Repo, }
\ No newline at end of file
diff --git a/src-tauri/bindings/PullRequestType.ts b/src-tauri/bindings/PullRequestType.ts
new file mode 100644
index 00000000..2d1fd0a8
--- /dev/null
+++ b/src-tauri/bindings/PullRequestType.ts
@@ -0,0 +1,3 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export type PullRequestType = "MODS" | "LAUNCHER";
\ No newline at end of file
diff --git a/src-tauri/bindings/PullsApiResponseElement.ts b/src-tauri/bindings/PullsApiResponseElement.ts
new file mode 100644
index 00000000..b2b5c476
--- /dev/null
+++ b/src-tauri/bindings/PullsApiResponseElement.ts
@@ -0,0 +1,4 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+import type { CommitHead } from "./CommitHead";
+
+export interface PullsApiResponseElement { number: bigint, title: string, url: string, head: CommitHead, html_url: string, }
\ No newline at end of file
diff --git a/src-tauri/bindings/Repo.ts b/src-tauri/bindings/Repo.ts
new file mode 100644
index 00000000..836f39d7
--- /dev/null
+++ b/src-tauri/bindings/Repo.ts
@@ -0,0 +1,3 @@
+// This file was generated by [ts-rs](https://github.com/Aleph-Alpha/ts-rs). Do not edit this file manually.
+
+export interface Repo { full_name: string, }
\ No newline at end of file
diff --git a/src-tauri/src/constants.rs b/src-tauri/src/constants.rs
index 73cb6fb3..57a10e02 100644
--- a/src-tauri/src/constants.rs
+++ b/src-tauri/src/constants.rs
@@ -28,3 +28,9 @@ pub const BLACKLISTED_MODS: [&str; 3] = [
 
 // Titanfall2 game IDs on Origin/EA-App
 pub const TITANFALL2_ORIGIN_IDS: [&str; 2] = ["Origin.OFR.50.0001452", "Origin.OFR.50.0001456"];
+
+// GitHub API endpoints for launcher/mods PRs
+pub const PULLS_API_ENDPOINT_LAUNCHER: &str =
+    "https://api.github.com/repos/R2Northstar/NorthstarLauncher/pulls";
+pub const PULLS_API_ENDPOINT_MODS: &str =
+    "https://api.github.com/repos/R2Northstar/NorthstarMods/pulls";
diff --git a/src-tauri/src/github/mod.rs b/src-tauri/src/github/mod.rs
index 80a1831a..942f0db2 100644
--- a/src-tauri/src/github/mod.rs
+++ b/src-tauri/src/github/mod.rs
@@ -1 +1,2 @@
+pub mod pull_requests;
 pub mod release_notes;
diff --git a/src-tauri/src/github/pull_requests.rs b/src-tauri/src/github/pull_requests.rs
new file mode 100644
index 00000000..2b7be30b
--- /dev/null
+++ b/src-tauri/src/github/pull_requests.rs
@@ -0,0 +1,446 @@
+use crate::github::release_notes::fetch_github_releases_api;
+
+use anyhow::anyhow;
+use app::check_is_valid_game_path;
+use app::constants::{APP_USER_AGENT, PULLS_API_ENDPOINT_LAUNCHER, PULLS_API_ENDPOINT_MODS};
+use serde::{Deserialize, Serialize};
+use std::fs;
+use std::fs::File;
+use std::io;
+use std::io::prelude::*;
+use std::path::Path;
+use ts_rs::TS;
+
+#[derive(Serialize, Deserialize, Debug, Clone, TS)]
+#[ts(export)]
+struct Repo {
+    full_name: String,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, TS)]
+#[ts(export)]
+struct CommitHead {
+    sha: String,
+    #[serde(rename = "ref")]
+    gh_ref: String,
+    repo: Repo,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, TS)]
+#[ts(export)]
+pub struct PullsApiResponseElement {
+    number: i64,
+    title: String,
+    url: String,
+    head: CommitHead,
+    html_url: String,
+}
+
+// GitHub API response JSON elements as structs
+#[derive(Debug, Deserialize, Clone)]
+struct WorkflowRun {
+    id: u64,
+    head_sha: String,
+}
+#[derive(Debug, Deserialize, Clone)]
+struct ActionsRunsResponse {
+    workflow_runs: Vec<WorkflowRun>,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+struct Artifact {
+    id: u64,
+    workflow_run: WorkflowRun,
+}
+
+#[derive(Debug, Deserialize, Clone)]
+struct ArtifactsResponse {
+    artifacts: Vec<Artifact>,
+}
+
+#[derive(Serialize, Deserialize, Debug, Clone, TS)]
+#[ts(export)]
+pub enum PullRequestType {
+    MODS,
+    LAUNCHER,
+}
+
+/// Parse pull requests from specified URL
+pub async fn get_pull_requests(url: String) -> Result<Vec<PullsApiResponseElement>, String> {
+    let json_response = match fetch_github_releases_api(&url).await {
+        Ok(result) => result,
+        Err(err) => return Err(err.to_string()),
+    };
+
+    let pulls_response: Vec<PullsApiResponseElement> = match serde_json::from_str(&json_response) {
+        Ok(res) => res,
+        Err(err) => return Err(err.to_string()),
+    };
+
+    Ok(pulls_response)
+}
+
+/// Gets either launcher or mods PRs
+#[tauri::command]
+pub async fn get_pull_requests_wrapper(
+    install_type: PullRequestType,
+) -> Result<Vec<PullsApiResponseElement>, String> {
+    let api_pr_url = match install_type {
+        PullRequestType::MODS => PULLS_API_ENDPOINT_MODS,
+        PullRequestType::LAUNCHER => PULLS_API_ENDPOINT_LAUNCHER,
+    };
+
+    get_pull_requests(api_pr_url.to_string()).await
+}
+
+fn unzip(zip_file_name: &str) -> String {
+    let fname = std::path::Path::new(zip_file_name);
+    let file = fs::File::open(fname).unwrap();
+
+    let mut archive = zip::ZipArchive::new(file).unwrap();
+
+    let mut folder_name = "".to_string();
+
+    for i in 0..archive.len() {
+        let mut file = archive.by_index(i).unwrap();
+        let outpath = match file.enclosed_name() {
+            Some(path) => path.to_owned(),
+            None => continue,
+        };
+
+        {
+            let comment = file.comment();
+            if !comment.is_empty() {
+                println!("File {} comment: {}", i, comment);
+            }
+        }
+
+        if i == 0 {
+            // Sanity check that it's a folder
+            assert!((*file.name()).ends_with('/'));
+
+            folder_name = format!("{}", outpath.display());
+            println!("{}", folder_name);
+        }
+
+        if (*file.name()).ends_with('/') {
+            fs::create_dir_all(&outpath).unwrap();
+        } else {
+            if let Some(p) = outpath.parent() {
+                if !p.exists() {
+                    fs::create_dir_all(p).unwrap();
+                }
+            }
+            let mut outfile = fs::File::create(&outpath).unwrap();
+            io::copy(&mut file, &mut outfile).unwrap();
+        }
+
+        // Get and Set permissions
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::PermissionsExt;
+
+            if let Some(mode) = file.unix_mode() {
+                fs::set_permissions(&outpath, fs::Permissions::from_mode(mode)).unwrap();
+            }
+        }
+    }
+    folder_name
+}
+
+pub async fn check_github_api(url: &str) -> Result<serde_json::Value, Box<dyn std::error::Error>> {
+    let client = reqwest::Client::new();
+    let res = client
+        .get(url)
+        .header(reqwest::header::USER_AGENT, APP_USER_AGENT)
+        .send()
+        .await
+        .unwrap()
+        .text()
+        .await
+        .unwrap();
+
+    let json: serde_json::Value = serde_json::from_str(&res).expect("JSON was not well-formatted");
+
+    Ok(json)
+}
+
+/// Downloads a file from given URL
+async fn download_zip(download_url: String, location: String) -> Result<(), anyhow::Error> {
+    let client = reqwest::Client::new();
+    let resp = client
+        .get(download_url)
+        .header(reqwest::header::USER_AGENT, APP_USER_AGENT)
+        .send()
+        .await?;
+
+    // Error out earlier if non-successful response
+    if !resp.status().is_success() {
+        // Return error cause wrong game path
+        return Err(anyhow!(
+            "Couldn't download zip. Received error code \"{}\"",
+            resp.status()
+        ));
+    }
+
+    let mut out = fs::File::create(format!("{}/ns-dev-test-helper-temp-pr-files.zip", location))
+        .expect("failed to create file");
+    let bytes = resp.bytes().await?;
+    let mut cursor = std::io::Cursor::new(bytes);
+    std::io::copy(&mut cursor, &mut out)?;
+    Ok(())
+}
+
+fn unzip_launcher_zip(zip_file_name: &str) -> String {
+    let outfolder_name = "ns-dev-test-helper-temp-pr-files";
+    let fname = std::path::Path::new(zip_file_name);
+    let file = fs::File::open(fname).unwrap();
+
+    let mut archive = zip::ZipArchive::new(file).unwrap();
+
+    fs::create_dir_all(outfolder_name).unwrap();
+
+    for i in 0..archive.len() {
+        let mut file = archive.by_index(i).unwrap();
+        let outpath = match file.enclosed_name() {
+            Some(path) => path.to_owned(),
+            None => continue,
+        };
+
+        {
+            let comment = file.comment();
+            if !comment.is_empty() {
+                println!("File {} comment: {}", i, comment);
+            }
+        }
+
+        // Only extract two hardcoded files
+        if *file.name() == *"NorthstarLauncher.exe" || *file.name() == *"Northstar.dll" {
+            println!(
+                "File {} extracted to \"{}\" ({} bytes)",
+                i,
+                outpath.display(),
+                file.size()
+            );
+            if let Some(p) = outpath.parent() {
+                if !p.exists() {
+                    fs::create_dir_all(p).unwrap();
+                }
+            }
+            let mut outfile =
+                fs::File::create(format!("{}/{}", outfolder_name, outpath.display())).unwrap();
+            std::io::copy(&mut file, &mut outfile).unwrap();
+        }
+
+        // Get and Set permissions
+        #[cfg(unix)]
+        {
+            use std::os::unix::fs::PermissionsExt;
+
+            if let Some(mode) = file.unix_mode() {
+                fs::set_permissions(&outpath, fs::Permissions::from_mode(mode)).unwrap();
+            }
+        }
+    }
+    outfolder_name.to_string()
+}
+
+/// Recursively copies files from one directory to another
+fn copy_dir_all(src: impl AsRef<Path>, dst: impl AsRef<Path>) -> io::Result<()> {
+    fs::create_dir_all(&dst)?;
+    for entry in fs::read_dir(src)? {
+        let entry = entry?;
+        let ty = entry.file_type()?;
+        if ty.is_dir() {
+            copy_dir_all(entry.path(), dst.as_ref().join(entry.file_name()))?;
+        } else {
+            fs::copy(entry.path(), dst.as_ref().join(entry.file_name()))?;
+        }
+    }
+    Ok(())
+}
+
+/// Gets GitHub download link of a mods PR
+fn get_mods_download_link(pull_request: PullsApiResponseElement) -> Result<String, anyhow::Error> {
+    // {pr object} -> number == pr_number
+    //             -> head -> ref
+    //                     -> repo -> full_name
+
+    // Use repo and branch name to get download link
+    let download_url = format!(
+        "https://github.com/{}/archive/refs/heads/{}.zip",
+        pull_request.head.repo.full_name, // repo name
+        pull_request.head.gh_ref,         // branch name
+    );
+
+    Ok(download_url)
+}
+
+/// Gets `nightly.link` artifact download link of a launcher PR
+async fn get_launcher_download_link(
+    pull_request: PullsApiResponseElement,
+) -> Result<String, String> {
+    // Iterate over the first 10 pages of
+    for i in 1..=10 {
+        // Crossreference with runs API
+        let runs_response: ActionsRunsResponse = match check_github_api(&format!(
+            "https://api.github.com/repos/R2Northstar/NorthstarLauncher/actions/runs?page={}",
+            i
+        ))
+        .await
+        {
+            Ok(result) => serde_json::from_value(result).unwrap(),
+            Err(err) => return Err(format!("{}", err)),
+        };
+
+        // Cross-reference PR head commit sha against workflow runs
+        for workflow_run in &runs_response.workflow_runs {
+            // If head commit sha of run and PR match, grab CI output
+            if workflow_run.head_sha == pull_request.head.sha {
+                // Check artifacts
+                let api_url = format!("https://api.github.com/repos/R2Northstar/NorthstarLauncher/actions/runs/{}/artifacts", workflow_run.id);
+                let artifacts_response: ArtifactsResponse = serde_json::from_value(
+                    check_github_api(&api_url).await.expect("Failed request"),
+                )
+                .unwrap();
+
+                // Iterate over artifacts
+                for artifact in artifacts_response.artifacts {
+                    // Make sure run is from PR head commit
+                    if artifact.workflow_run.head_sha == workflow_run.head_sha {
+                        dbg!(artifact.id);
+
+                        // Download artifact
+                        return Ok(format!("https://nightly.link/R2Northstar/NorthstarLauncher/actions/artifacts/{}.zip", artifact.id));
+                    }
+                }
+            }
+        }
+    }
+
+    Err(format!(
+        "Couldn't grab download link for PR \"{}\". PR might be too old and therefore no CI build has been deleted. Maybe ask author to update?",
+        pull_request.number
+    ))
+}
+
+/// Adds a batch file that allows for launching Northstar with mods PR profile
+fn add_batch_file(game_install_path: &str) {
+    let batch_path = format!("{}/r2ns-launch-mod-pr-version.bat", game_install_path);
+    let path = Path::new(&batch_path);
+    let display = path.display();
+
+    // Open a file in write-only mode, returns `io::Result<File>`
+    let mut file = match File::create(path) {
+        Err(why) => panic!("couldn't create {}: {}", display, why),
+        Ok(file) => file,
+    };
+
+    // Write the string to `file`, returns `io::Result<()>`
+    let batch_file_content =
+        "NorthstarLauncher.exe -profile=R2Northstar-PR-test-managed-folder\r\n";
+
+    match file.write_all(batch_file_content.as_bytes()) {
+        Err(why) => panic!("couldn't write to {}: {}", display, why),
+        Ok(_) => println!("successfully wrote to {}", display),
+    }
+}
+
+/// Downloads selected launcher PR and extracts it into game install path
+#[tauri::command]
+pub async fn apply_launcher_pr(
+    pull_request: PullsApiResponseElement,
+    game_install_path: &str,
+) -> Result<(), String> {
+    // Exit early if wrong game path
+    check_is_valid_game_path(game_install_path)?;
+
+    // get download link
+    let download_url = get_launcher_download_link(pull_request).await?;
+
+    // download
+    match download_zip(download_url, ".".to_string()).await {
+        Ok(_) => (),
+        Err(err) => return Err(err.to_string()),
+    };
+
+    // extract
+    let zip_extract_folder_name = unzip_launcher_zip("ns-dev-test-helper-temp-pr-files.zip");
+    fs::remove_file("ns-dev-test-helper-temp-pr-files.zip").unwrap();
+
+    // Copy downloaded folder to game install folder
+    match copy_dir_all(zip_extract_folder_name.clone(), game_install_path) {
+        Ok(_) => (),
+        Err(err) => {
+            return Err(format!("Failed copying files: {}", err));
+        }
+    }
+
+    // Delete old unzipped
+    fs::remove_dir_all(zip_extract_folder_name).unwrap();
+
+    println!("All done with installing launcher PR");
+    Ok(())
+}
+
+/// Downloads selected mods PR and extracts it into profile in game install path
+#[tauri::command]
+pub async fn apply_mods_pr(
+    pull_request: PullsApiResponseElement,
+    game_install_path: &str,
+) -> Result<(), String> {
+    // Exit early if wrong game path
+    check_is_valid_game_path(game_install_path)?;
+
+    let download_url = match get_mods_download_link(pull_request) {
+        Ok(url) => url,
+        Err(err) => return Err(err.to_string()),
+    };
+
+    match download_zip(download_url, ".".to_string()).await {
+        Ok(()) => (),
+        Err(err) => return Err(err.to_string()),
+    };
+
+    // Extract folder and delete zip
+    let zip_extract_folder_name = unzip("ns-dev-test-helper-temp-pr-files.zip");
+    fs::remove_file("ns-dev-test-helper-temp-pr-files.zip").unwrap();
+
+    // Delete previously managed folder
+    if std::fs::remove_dir_all(format!(
+        "{}/R2Northstar-PR-test-managed-folder",
+        game_install_path
+    ))
+    .is_err()
+    {
+        if std::path::Path::new(&format!(
+            "{}/R2Northstar-PR-test-managed-folder",
+            game_install_path
+        ))
+        .exists()
+        {
+            println!("Failed removing previous dir");
+        } else {
+            println!("Failed removing folder that doesn't exist. Probably cause first run");
+        }
+    };
+
+    // Copy downloaded folder to game install folder
+    copy_dir_all(
+        zip_extract_folder_name.clone(),
+        format!(
+            "{}/R2Northstar-PR-test-managed-folder/mods",
+            game_install_path
+        ),
+    )
+    .unwrap();
+
+    // Delete old copy
+    std::fs::remove_dir_all(zip_extract_folder_name).unwrap();
+
+    // Add batch file to launch right profile
+    add_batch_file(game_install_path);
+
+    println!("All done with installing mods PR");
+    Ok(())
+}
diff --git a/src-tauri/src/github/release_notes.rs b/src-tauri/src/github/release_notes.rs
index 6dee4576..b59358ec 100644
--- a/src-tauri/src/github/release_notes.rs
+++ b/src-tauri/src/github/release_notes.rs
@@ -19,7 +19,7 @@ pub struct FlightCoreVersion {
 }
 
 // Fetches repo release API and returns response as string
-async fn fetch_github_releases_api(url: &str) -> Result<String, String> {
+pub async fn fetch_github_releases_api(url: &str) -> Result<String, String> {
     println!("Fetching releases notes from GitHub API");
 
     let client = reqwest::Client::new();
diff --git a/src-tauri/src/main.rs b/src-tauri/src/main.rs
index c0c8a186..c7451763 100644
--- a/src-tauri/src/main.rs
+++ b/src-tauri/src/main.rs
@@ -15,6 +15,7 @@ use app::{
 };
 
 mod github;
+use github::pull_requests::{apply_launcher_pr, apply_mods_pr, get_pull_requests_wrapper};
 use github::release_notes::{
     check_is_flightcore_outdated, get_newest_flightcore_version, get_northstar_release_notes,
 };
@@ -115,6 +116,9 @@ fn main() {
             get_server_player_count,
             delete_thunderstore_mod,
             query_thunderstore_packages_api,
+            get_pull_requests_wrapper,
+            apply_launcher_pr,
+            apply_mods_pr,
         ])
         .run(tauri::generate_context!())
         .expect("error while running tauri application");