feat: delete sessions (#362)

Co-authored-by: adamdottv <2363879+adamdottv@users.noreply.github.com>

packages/opencode/src/session/index.ts

@@ -72,6 +72,12 @@ export namespace Session {
         info: Info,
       }),
     ),
+    Deleted: Bus.event(
+      "session.deleted",
+      z.object({
+        info: Info,
+      }),
+    ),
     Error: Bus.event(
       "session.error",
       z.object({
@@ -206,6 +212,17 @@ export namespace Session {
     }
   }
 
+  export async function children(parentID: string) {
+    const result = [] as Session.Info[]
+    for await (const item of Storage.list("session/info")) {
+      const sessionID = path.basename(item, ".json")
+      const session = await get(sessionID)
+      if (session.parentID !== parentID) continue
+      result.push(session)
+    }
+    return result
+  }
+
   export function abort(sessionID: string) {
     const controller = state().pending.get(sessionID)
     if (!controller) return false
@@ -214,6 +231,28 @@ export namespace Session {
     return true
   }
 
+  export async function remove(sessionID: string, emitEvent = true) {
+    try {
+      abort(sessionID)
+      const session = await get(sessionID)
+      for (const child of await children(sessionID)) {
+        await remove(child.id, false)
+      }
+      await unshare(sessionID).catch(() => {})
+      await Storage.remove(`session/info/${sessionID}`).catch(() => {})
+      await Storage.removeDir(`session/message/${sessionID}/`).catch(() => {})
+      state().sessions.delete(sessionID)
+      state().messages.delete(sessionID)
+      if (emitEvent) {
+        Bus.publish(Event.Deleted, {
+          info: session,
+        })
+      }
+    } catch (e) {
+      log.error(e)
+    }
+  }
+
   async function updateMessage(msg: Message.Info) {
     await Storage.writeJSON(
       "session/message/" + msg.metadata.sessionID + "/" + msg.id,