Reworks branch parsing to include tracking info

Reworks current branch retrieval for better performance

src/git/models/branch.ts

@@ -5,15 +5,9 @@ export class GitBranch {
     current: boolean;
     name: string;
     remote: boolean;
+    tracking?: string;
 
-    constructor(branch: string) {
-        branch = branch.trim();
-
-        if (branch.startsWith('* ')) {
-            branch = branch.substring(2);
-            this.current = true;
-        }
-
+    constructor(public readonly repoPath: string, branch: string, current: boolean = false, tracking?: string) {
         if (branch.startsWith('remotes/')) {
             branch = branch.substring(8);
             this.remote = true;
@@ -24,6 +18,24 @@ export class GitBranch {
             branch = branch.substring(0, index);
         }
 
+        this.current = current;
         this.name = branch;
+        this.tracking = tracking;
+    }
+
+    getName(): string {
+        return this.remote
+            ? this.name.substring(this.name.indexOf('/') + 1)
+            : this.name;
+    }
+
+    getRemote(): string | undefined {
+        if (this.remote) return GitBranch.getRemote(this.name);
+        if (this.tracking !== undefined) return GitBranch.getRemote(this.tracking);
+        return undefined;
+    }
+
+    static getRemote(branch: string): string {
+        return branch.substring(0, branch.indexOf('/'));
     }
 }