feat: add announcement and pivot table with segment.

database/migrations/2021_05_26_094333_create_announcements_table.php

@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateAnnouncementsTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('announcements', function (Blueprint $table) {
+            $table->id();
+            $table->string('title', 50);
+            $table->longText('description');
+            $table->timestamp('starting_on')->nullable();
+            $table->timestamp('ending_on')->nullable();
+            $table->boolean('is_all_day')->default(false);
+            $table->integer('duration')->default(0);
+            $table->boolean('is_recurring')->default(false);
+            $table->string('recurrence_pattern')->nullable();
+            $table->softDeletes();
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('announcements');
+    }
+}

database/migrations/2021_06_02_233501_create_announcement_segment_table.php

@@ -0,0 +1,40 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateAnnouncementSegmentTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('announcement_segment', function (Blueprint $table) {
+
+            $table->primary(['announcement_id', 'segment_id']);
+            $table->bigInteger('announcement_id')->unsigned();
+            $table->bigInteger('segment_id')->unsigned();
+            $table->timestamps();
+            $table->foreign('announcement_id')
+                ->references('id')
+                ->on('announcements')->onDelete('cascade');
+            $table->foreign('segment_id')
+                ->references('id')
+                ->on('segments')->onDelete('cascade');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('announcement_segment');
+    }
+}