Added file suffix and icon associations data

crates/project_panel/src/file_associations.rs

@@ -0,0 +1,64 @@
+use std::{path::Path, str, sync::Arc};
+
+use collections::HashMap;
+
+use gpui::{AppContext, AssetSource};
+use serde_derive::Deserialize;
+
+#[derive(Deserialize, Debug)]
+struct TypeConfig {
+    icon: Arc<str>,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct FileAssociations {
+    suffixes: HashMap<String, String>,
+    types: HashMap<String, TypeConfig>,
+}
+
+pub const TEXT_FILE_ASSET: &'static str = "icons/file_icons/quill/file.svg";
+const DIRECTORY_TYPE: &'static str = "directory";
+const EXPANDED_DIRECTORY_TYPE: &'static str = "expanded_directory";
+
+pub fn init(assets: impl AssetSource, cx: &mut AppContext) {
+    cx.set_global(FileAssociations::new(assets))
+}
+
+impl FileAssociations {
+    pub fn new(assets: impl AssetSource) -> Self {
+        let file = assets.load("icons/file_icons/file_types.json").unwrap();
+        serde_json::from_str::<FileAssociations>(str::from_utf8(&file).unwrap()).unwrap()
+    }
+
+    pub fn get_icon(path: &Path, cx: &AppContext) -> Option<Arc<str>> {
+        if !cx.has_global::<Self>() {
+            return None;
+        }
+
+        let this = cx.global::<Self>();
+        let suffix = path.extension()?.to_str()?;
+
+        this.suffixes
+            .get(suffix)
+            .and_then(|type_str| this.types.get(type_str))
+            .map(|type_config| type_config.icon.clone())
+    }
+
+    pub fn get_folder_icon(expanded: bool, cx: &AppContext) -> Option<Arc<str>> {
+        if !cx.has_global::<Self>() {
+            return None;
+        }
+
+        let this = cx.global::<Self>();
+
+        let key = if expanded {
+            EXPANDED_DIRECTORY_TYPE
+        } else {
+            DIRECTORY_TYPE
+        };
+
+        this.types
+            .get(key)
+            .map(|type_config| type_config.icon.clone())
+    }
+}