feat: add survey

app/Models/SurveyAnswer.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class SurveyAnswer extends Model
+{
+    protected $fillable = ['user_id', 'survey_question_id', 'survey_option_id'];
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function question(): BelongsTo
+    {
+        return $this->belongsTo(SurveyQuestion::class, 'survey_question_id');
+    }
+
+    public function option(): BelongsTo
+    {
+        return $this->belongsTo(SurveyOption::class, 'survey_option_id');
+    }
+}

app/Models/SurveyOption.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class SurveyOption extends Model
+{
+    protected $fillable = ['survey_question_id', 'label', 'value', 'order'];
+
+    protected $casts = [
+        'order' => 'integer',
+    ];
+
+    public function question(): BelongsTo
+    {
+        return $this->belongsTo(SurveyQuestion::class, 'survey_question_id');
+    }
+
+    public function answers(): HasMany
+    {
+        return $this->hasMany(SurveyAnswer::class);
+    }
+}

app/Models/SurveyQuestion.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class SurveyQuestion extends Model
+{
+    protected $fillable = ['question', 'description', 'type', 'order', 'is_active'];
+
+    protected $casts = [
+        'is_active' => 'boolean',
+        'order' => 'integer',
+    ];
+
+    public function options(): HasMany
+    {
+        return $this->hasMany(SurveyOption::class)->orderBy('order');
+    }
+
+    public function answers(): HasMany
+    {
+        return $this->hasMany(SurveyAnswer::class);
+    }
+
+    // The current user's selected option ids for this question.
+    public function userAnswers(): HasMany
+    {
+        return $this->hasMany(SurveyAnswer::class)->where('user_id', auth()->id());
+    }
+}