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maldechavdamaldechavda
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- added feature for like/dislike post.
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‎app/Follow.php‎

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<?php
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namespace App;
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use Carbon\Carbon;
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use Illuminate\Database\Eloquent\Model;
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use Illuminate\Database\Eloquent\Relations\MorphToMany;
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use stdClass;
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/**
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* Class Follow.
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*/
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class Follow
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{
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const RELATION_LIKE = 'like';
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const RELATION_FOLLOW = 'follow';
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const RELATION_TYPES = [
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'likes' => 'like',
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'likers' => 'like',
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'fans' => 'like',
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'followings' => 'follow',
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'followers' => 'follow',
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];
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/**
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* @param \Illuminate\Database\Eloquent\Model $model
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* @param string $relation
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* @param array|string|\Illuminate\Database\Eloquent\Model $target
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* @param string $class
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*
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* @return bool
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*/
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public static function isRelationExists(Model $model, $relation, $target, $class = null)
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{
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$target = self::formatTargets($target, $class ?: User::class);
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if ($model->relationLoaded($relation)) {
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return $model->{$relation}->where($target->tableName . '.id', head($target->ids))->isNotEmpty();
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}
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return $model->{$relation}($target->classname)->where($target->tableName . '.id', head($target->ids))->exists();
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}
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/**
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* @param \Illuminate\Database\Eloquent\Model $model
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* @param string $relation
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* @param array|string|\Illuminate\Database\Eloquent\Model $targets
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* @param string $class
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*
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* @throws \Exception
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*
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* @return array
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*/
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public static function attachRelations(Model $model, $relation, $targets, $class)
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{
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$targets = self::attachPivotsFromRelation($model->{$relation}(), $targets, $class);
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return $model->{$relation}($targets->classname)->sync($targets->targets, false);
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}
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/**
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* @param \Illuminate\Database\Eloquent\Model $model
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* @param string $relation
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* @param array|string|\Illuminate\Database\Eloquent\Model $targets
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* @param string $class
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*
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* @return array
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*/
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public static function detachRelations(Model $model, $relation, $targets, $class)
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{
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$targets = self::formatTargets($targets, $class);
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return $model->{$relation}($targets->classname)->detach($targets->ids);
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}
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/**
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* @param \Illuminate\Database\Eloquent\Model $model
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* @param string $relation
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* @param array|string|\Illuminate\Database\Eloquent\Model $targets
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* @param string $class
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*
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* @throws \Exception
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*
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* @return array
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*/
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public static function toggleRelations(Model $model, $relation, $targets, $class)
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{
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$targets = self::attachPivotsFromRelation($model->{$relation}(), $targets, $class);
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$results = $model->{$relation}($targets->classname)->toggle($targets->targets);
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return $results;
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}
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/**
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* @param \Illuminate\Database\Eloquent\Relations\MorphToMany $morph
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* @param array|string|\Illuminate\Database\Eloquent\Model $targets
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* @param string $class
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*
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* @throws \Exception
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*
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* @return \stdClass
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*/
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public static function attachPivotsFromRelation(MorphToMany $morph, $targets, $class)
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{
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return self::formatTargets($targets, $class, [
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'relation' => self::getRelationTypeFromRelation($morph),
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'created_at' => Carbon::now()->format('Y-m-d H:i:s'),
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]);
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}
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/**
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* @param array|string|\Illuminate\Database\Eloquent\Model $targets
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* @param string $classname
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* @param array $update
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*
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* @return \stdClass
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*/
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public static function formatTargets($targets, $classname, array $update = [])
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{
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$result = new stdClass();
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$result->classname = $classname;
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$result->tableName = null;
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if (!is_array($targets)) {
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$targets = [$targets];
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}
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$result->ids = array_map(function ($target) use ($result) {
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if ($target instanceof Model) {
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$result->classname = get_class($target);
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$result->tableName = $target->getTable();
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return $target->getKey();
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}
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return intval($target);
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}, $targets);
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$result->targets = empty($update) ? $result->ids : array_combine($result->ids, array_pad([], count($result->ids), $update));
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return $result;
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}
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/**
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* @param \Illuminate\Database\Eloquent\Relations\MorphToMany $relation
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*
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* @throws \Exception
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*
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* @return array
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*/
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protected static function getRelationTypeFromRelation(MorphToMany $relation)
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{
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if (!\array_key_exists($relation->getRelationName(), self::RELATION_TYPES)) {
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throw new \Exception('Invalid relation definition.');
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}
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return self::RELATION_TYPES[$relation->getRelationName()];
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}
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/**
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* @param string $field
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*
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* @return string
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*/
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protected static function tablePrefixedField($field)
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{
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return \sprintf('%s.%s', config('follow.followable_table'), $field);
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}
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}

‎app/Http/Controllers/Api/LikeController.php‎

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<?php
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namespace App\Http\Controllers\Api;
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use App\Post;
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use Illuminate\Http\Request;
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use App\Http\Controllers\Controller;
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class LikeController extends Controller
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{
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/**
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* @param \Illuminate\Http\Request $request
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* @param $id
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*
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* @return \Illuminate\Http\JsonResponse
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*/
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public function store(Request $request, $id)
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{
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$post = Post::findOrFail($id);
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$request->user()->toggleLike($post);
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return response()->json([
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'success' => true,
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]);
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}
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}

‎database/migrations/2019_01_24_050630_create_followable_table.php‎

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<?php
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use Illuminate\Support\Facades\Schema;
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use Illuminate\Database\Schema\Blueprint;
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use Illuminate\Database\Migrations\Migration;
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class CreateFollowableTable extends Migration
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{
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/**
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* Run the migrations.
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*
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* @return void
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*/
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public function up()
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{
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Schema::create('followables', function (Blueprint $table) {
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$table->unsignedInteger('user_id');
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$table->unsignedInteger('followable_id');
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$table->string('followable_type')->index();
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$table->string('relation')->default('follow')->comment('follow | like');
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$table->timestamps();
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$table->foreign('user_id')
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->on('users')
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->references('id')
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->onUpdate('cascade')
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->onDelete('cascade');
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});
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}
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/**
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* Reverse the migrations.
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*
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* @return void
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*/
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public function down()
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{
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Schema::dropIfExists('followable');
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}
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}

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