feat: add remove token command

Add command to remove old or invalid tokens from registry/storage.

Closes #193

package.json

@@ -105,6 +105,11 @@
         "title": "Setup Gitlab Token...",
         "category": "GitHub"
       },
+      {
+        "command": "vscode-github.clearToken",
+        "title": "Remove Token...",
+        "category": "GitHub"
+      },
       {
         "command": "vscode-github.browseProject",
         "title": "Browse project",

src/commands/token.ts

@@ -2,6 +2,7 @@ import { component, inject } from 'tsdi';
 import * as vscode from 'vscode';
 
 import { Command } from '../command';
+import { listTokenHosts, removeToken } from '../tokens';
 import { WorkflowManager, Tokens } from '../workflow-manager';
 
 @component({eager: true})
@@ -109,3 +110,23 @@ export class SetGitLabToken extends Command {
   }
 
 }
+
+@component({eager: true})
+export class ClearToken extends Command {
+
+  public id = 'vscode-github.clearToken';
+
+  @inject('vscode.ExtensionContext')
+  private context: vscode.ExtensionContext;
+
+  public async run(): Promise<void> {
+    this.track('execute');
+    const host = await vscode.window.showQuickPick(listTokenHosts(this.context.globalState), {
+      placeHolder: 'Token to remove'
+    });
+    if (host) {
+      removeToken(this.context.globalState, host);
+    }
+  }
+
+}

src/tokens.ts

@@ -30,3 +30,19 @@ export function migrateToken(memento: Memento): void {
     memento.update('tokens', struct);
   }
 }
+
+export function listTokenHosts(memento: Memento): string[] {
+  const tokens: Tokens | undefined = memento.get('tokens');
+  if (!tokens) {
+    return [];
+  }
+  return Object.keys(tokens);
+}
+
+export function removeToken(memento: Memento, host: string): void {
+  const tokens: Tokens | undefined = memento.get('tokens');
+  if (tokens) {
+    delete tokens[host];
+    memento.update('tokens', tokens);
+  }
+}