live tail subscription

src/server.ts

@@ -30,7 +30,7 @@ export class FeedGenerator {
   static create(config?: Partial<Config>) {
     const cfg: Config = {
       port: config?.port ?? 3000,
-      sqliteLocation: config?.sqliteLocation ?? 'test.sqlite',
+      sqliteLocation: config?.sqliteLocation ?? ':memory:',
       subscriptionEndpoint: config?.subscriptionEndpoint ?? 'wss://bsky.social',
       serviceDid: config?.serviceDid ?? 'did:example:test',
     }

src/subscription.ts

@@ -8,6 +8,11 @@ export class FirehoseSubscription extends FirehoseSubscriptionBase {
   async handleEvent(evt: RepoEvent) {
     if (!isCommit(evt)) return
     const ops = await getOpsByType(evt)
+    if (ops.posts.creates.length > 0) {
+      for (const op of ops.posts.creates) {
+        console.log(op.record.text)
+      }
+    }
     const postsToDelete = ops.posts.deletes.map((del) => del.uri)
     const postsToCreate = ops.posts.creates
       .filter((create) => {

src/util/subscription.ts

@@ -36,7 +36,6 @@ export abstract class FirehoseSubscriptionBase {
   abstract handleEvent(evt: RepoEvent): Promise<void>
 
   async run() {
-    await this.ensureCursor()
     for await (const evt of this.sub) {
       try {
         await this.handleEvent(evt)
@@ -50,17 +49,6 @@ export abstract class FirehoseSubscriptionBase {
     }
   }
 
-  async ensureCursor() {
-    await this.db
-      .insertInto('sub_state')
-      .values({
-        service: this.service,
-        cursor: 0,
-      })
-      .onConflict((oc) => oc.doNothing())
-      .execute()
-  }
-
   async updateCursor(cursor: number) {
     await this.db
       .updateTable('sub_state')
@@ -69,13 +57,13 @@ export abstract class FirehoseSubscriptionBase {
       .execute()
   }
 
-  async getCursor(): Promise<{ cursor: number }> {
+  async getCursor(): Promise<{ cursor?: number }> {
     const res = await this.db
       .selectFrom('sub_state')
       .selectAll()
       .where('service', '=', this.service)
       .executeTakeFirst()
-    return res ? { cursor: res.cursor } : { cursor: 0 }
+    return res ? { cursor: res.cursor } : {}
   }
 }