Art for steam games (#125)

src/steam/installed_games.rs

@@ -0,0 +1,78 @@
+use std::{ffi::OsStr, path::Path};
+
+use super::{get_steam_path, SteamSettings};
+
+#[derive(Debug, Clone)]
+pub struct SteamGameInfo {
+    pub appid: u32,
+    pub name: String,
+}
+
+pub fn get_installed_games(settings: &SteamSettings) -> Vec<SteamGameInfo> {
+    let path = get_steam_path(settings);
+    if let Ok(path) = path {
+        let apps_path = Path::new(&path).join("steamapps");
+        if let Ok(files) = std::fs::read_dir(apps_path) {
+            let mut games = vec![];
+            for file in files {
+                if let Ok(file) = file {
+                    if let Some(game_info) = parse_manifest_file(&file.path()) {
+                        games.push(game_info);
+                    }
+                }
+            }
+            return games;
+        }
+    }
+    vec![]
+}
+
+fn parse_manifest_file(path: &Path) -> Option<SteamGameInfo> {
+    let extension = path.extension().and_then(OsStr::to_str);
+    if let Some("acf") = extension {
+        let file_content = std::fs::read_to_string(path);
+        if let Ok(file_content) = file_content {
+            return parse_manifest_string(file_content);
+        }
+    }
+    None
+}
+
+fn parse_manifest_string<S: AsRef<str>>(string: S) -> Option<SteamGameInfo> {
+    let mut lines = string.as_ref().lines();
+    let app_id_line = lines.find(|l| l.contains("\"appid\""));
+    let name_line = lines.find(|l| l.contains("\"name\""));
+    match (app_id_line, name_line) {
+        (Some(app_id_line), Some(name_line)) => Some(SteamGameInfo {
+            name: name_line[10..name_line.len() - 1].to_string(),
+            appid: app_id_line[11..app_id_line.len() - 1]
+                .to_string()
+                .parse()
+                .unwrap(),
+        }),
+        _ => None,
+    }
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::*;
+
+    #[test]
+    fn parse_steam_game() {
+        let string = include_str!("../testdata/acf/appmanifest_763890.acf");
+        let game_info = parse_manifest_string(string);
+        assert!(game_info.is_some());
+        let game_info = game_info.unwrap();
+        assert_eq!("Wildermyth", game_info.name);
+        assert_eq!(763890, game_info.appid);
+    }
+
+    // #[test]
+    // fn installed_files() {
+    //     let settings = SteamSettings::default();
+    //     let installed_games = get_installed_games(&settings);
+    //     assert_eq!(installed_games.len(), 7);
+    // }
+}