implemented a lot of features

database/migrations/1768620764730_create_parts_table.ts

@@ -0,0 +1,24 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * Segments (articles) of a binary. The primary key makes re-ingesting the
+ * same range a no-op.
+ */
+export default class extends BaseSchema {
+  protected tableName = 'parts'
+
+  async up() {
+    this.schema.createTable(this.tableName, (table) => {
+      table.bigInteger('binary_id').notNullable().references('binaries.id').onDelete('CASCADE')
+      table.integer('number').notNullable()
+      table.text('message_id').notNullable()
+      table.integer('bytes').notNullable()
+      table.bigInteger('article_number')
+      table.primary(['binary_id', 'number'])
+    })
+  }
+
+  async down() {
+    this.schema.dropTable(this.tableName)
+  }
+}