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+<?php
+
+/**
+ * @file classes/migration/install/DoiMigration.php
+ *
+ * Copyright (c) 2014-2022 Simon Fraser University
+ * Copyright (c) 2000-2022 John Willinsky
+ * Distributed under the GNU GPL v3. For full terms see the file docs/COPYING.
+ *
+ * @class DoiMigration
+ *
+ * @brief Describe database table structures.
+ */
+
+namespace PKP\migration\install;
+
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+use PKP\migration\Migration;
+
+class DoiMigration extends Migration
+{
+    /**
+     * Run the migrations.
+     */
+    public function up(): void
+    {
+        // NB: A foreign key constraint is placed on context_id, but this is application dependent and
+        // needs to be added once the context has been created.
+        // It will reference the app specific column (e.g. journal_id, press_id, etc.).
+        Schema::create('dois', function (Blueprint $table) {
+            $table->comment('Stores all DOIs used in the system.');
+            $table->bigInteger('doi_id')->autoIncrement();
+
+            $table->bigInteger('context_id');
+            $contextDao = \APP\core\Application::getContextDAO();
+            $table->foreign('context_id')->references($contextDao->primaryKeyColumn)->on($contextDao->tableName)->onDelete('cascade');
+            $table->index(['context_id'], 'dois_context_id');
+
+            $table->string('doi');
+            $table->smallInteger('status')->default(1);
+        });
+
+        // Settings
+        Schema::create('doi_settings', function (Blueprint $table) {
+            $table->comment('More data about DOIs, including the registration agency.');
+            $table->bigIncrements('doi_setting_id');
+            $table->bigInteger('doi_id');
+            $table->string('locale', 14)->default('');
+            $table->string('setting_name', 255);
+            $table->mediumText('setting_value')->nullable();
+
+            $table->unique(['doi_id', 'locale', 'setting_name'], 'doi_settings_unique');
+            $table->index(['doi_id'], 'doi_settings_doi_id');
+            $table->foreign('doi_id')->references('doi_id')->on('dois')->cascadeOnDelete();
+        });
+    }
+
+    /**
+     * Reverse the migration.
+     */
+    public function down(): void
+    {
+        Schema::drop('dois');
+        Schema::drop('doi_settings');
+    }
+}