implemented a lot of features

database/migrations/1768620764830_add_content_names.ts

@@ -0,0 +1,40 @@
+import { BaseSchema } from '@adonisjs/lucid/schema'
+
+/**
+ * Names and groupings from file contents (CONCEPT.md D21): a fingerprint
+ * (exact size + MD5 of the first 16 KiB, as par2 records it) and the real
+ * filename recovered from par2.
+ */
+export default class extends BaseSchema {
+  async up() {
+    this.schema.alterTable('binaries', (table) => {
+      table.string('md5_16k', 32).index()
+      // Filename recovered from file contents (par2); `name` stays as posted.
+      table.text('real_name')
+    })
+    this.schema.alterTable('files', (table) => {
+      table.text('real_name')
+    })
+    for (const tableName of ['parts', 'part_conflicts']) {
+      this.schema.alterTable(tableName, (table) => {
+        // Only for part 1: MD5 of the first 16 KiB of the file.
+        table.string('md5_16k', 32)
+      })
+    }
+    this.schema.alterTable('release_files', (table) => {
+      table.index(['md5_16k'])
+    })
+  }
+
+  async down() {
+    this.schema.alterTable('release_files', (table) => table.dropIndex(['md5_16k']))
+    for (const tableName of ['parts', 'part_conflicts']) {
+      this.schema.alterTable(tableName, (table) => table.dropColumn('md5_16k'))
+    }
+    this.schema.alterTable('files', (table) => table.dropColumn('real_name'))
+    this.schema.alterTable('binaries', (table) => {
+      table.dropColumn('real_name')
+      table.dropColumn('md5_16k')
+    })
+  }
+}