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app/Http/Requests/Public/StorePublicApplicationRequest.php

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+<?php
+
+namespace App\Http\Requests\Public;
+
+use App\Models\Application;
+use App\Models\Election;
+use App\Models\Position;
+use App\Models\PusatMengundi;
+use App\Services\Public\KtmVacancyService;
+use App\Services\RegistrationPeriodService;
+use Illuminate\Foundation\Http\FormRequest;
+use Illuminate\Validation\Rule;
+use Illuminate\Validation\Validator;
+
+class StorePublicApplicationRequest extends FormRequest
+{
+    public function authorize(): bool
+    {
+        return true;
+    }
+
+    protected function prepareForValidation(): void
+    {
+        $this->merge([
+            'ic_number' => preg_replace('/\D+/', '', (string) $this->input('ic_number')),
+            'phone_number' => trim((string) $this->input('phone_number')),
+            'bank_account_number' => preg_replace('/[\s-]+/', '', (string) $this->input('bank_account_number')),
+        ]);
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function rules(): array
+    {
+        return [
+            'name' => ['required', 'string', 'max:255'],
+            'ic_number' => ['required', 'digits:12'],
+            'phone_number' => ['required', 'string', 'max:30'],
+            'email' => ['nullable', 'email', 'max:255'],
+            'address' => ['required', 'string', 'max:1000'],
+            'requested_position_code' => ['required', Rule::in(['KTM', 'KP', 'KPDP', 'PAPM'])],
+            'selected_ktm_assignment_id' => [
+                Rule::requiredIf(fn (): bool => in_array($this->input('requested_position_code'), ['KP', 'KPDP'], true)),
+                'nullable',
+                'integer',
+            ],
+            'bank_name' => ['required', 'string', 'max:255'],
+            'bank_account_number' => ['required', 'string', 'max:50'],
+            'ic_document' => ['required', 'file', 'mimes:pdf,jpg,jpeg,png', 'max:5120'],
+            'bank_statement' => ['required', 'file', 'mimes:pdf,jpg,jpeg,png', 'max:5120'],
+        ];
+    }
+
+    public function after(): array
+    {
+        return [
+            function (Validator $validator): void {
+                $pusatMengundi = $this->route('pusatMengundi');
+
+                if (! $pusatMengundi instanceof PusatMengundi) {
+                    return;
+                }
+
+                /** @var Election $election */
+                $election = $pusatMengundi->election()->with('settings')->firstOrFail();
+
+                if (! app(RegistrationPeriodService::class)->isOpen($election)) {
+                    $validator->errors()->add('registration', app(RegistrationPeriodService::class)->closedMessage($election));
+                }
+
+                $roleCode = (string) $this->input('requested_position_code');
+                $position = Position::query()
+                    ->where('code', $roleCode)
+                    ->where('is_public_applyable', true)
+                    ->first();
+
+                if (! $position instanceof Position) {
+                    $validator->errors()->add('requested_position_code', 'Jawatan yang dipilih tidak dibuka untuk permohonan awam.');
+
+                    return;
+                }
+
+                $this->validateDuplicateIc($validator, $pusatMengundi);
+
+                if (in_array($roleCode, ['KP', 'KPDP'], true)) {
+                    $this->validateKtmVacancy($validator, $pusatMengundi, $roleCode);
+                }
+            },
+        ];
+    }
+
+    /**
+     * @return array<string, string>
+     */
+    public function attributes(): array
+    {
+        return [
+            'name' => 'nama',
+            'ic_number' => 'no. kad pengenalan',
+            'phone_number' => 'no. telefon',
+            'email' => 'emel',
+            'address' => 'alamat',
+            'requested_position_code' => 'jawatan dipohon',
+            'selected_ktm_assignment_id' => 'KTM',
+            'bank_name' => 'nama bank',
+            'bank_account_number' => 'no. akaun bank',
+            'ic_document' => 'dokumen kad pengenalan',
+            'bank_statement' => 'penyata bank',
+        ];
+    }
+
+    private function validateDuplicateIc(Validator $validator, PusatMengundi $pusatMengundi): void
+    {
+        // SoftDeletes scope automatically excludes deleted_at IS NOT NULL records (e.g. soft-deleted
+        // KTM-created applicants). The whereNotIn further excludes 'cancelled' records (which are
+        // NOT soft-deleted) and 'deleted_by_ktm' records as an explicit safety layer.
+        $existing = Application::query()
+            ->where('election_id', $pusatMengundi->election_id)
+            ->where('ic_number', $this->input('ic_number'))
+            ->whereNotIn('status', ['cancelled', 'deleted_by_ktm'])
+            ->first();
+
+        if (! $existing instanceof Application) {
+            return;
+        }
+
+        if ($existing->source === 'created_by_ktm') {
+            $validator->errors()->add(
+                'ic_number',
+                'No. kad pengenalan ini telah didaftarkan oleh KTM. KTM perlu memadam rekod tersebut sebelum pemohon boleh mendaftar sendiri.',
+            );
+
+            return;
+        }
+
+        $validator->errors()->add(
+            'ic_number',
+            'No. kad pengenalan ini telah mempunyai permohonan untuk pilihanraya semasa.',
+        );
+    }
+
+    private function validateKtmVacancy(Validator $validator, PusatMengundi $pusatMengundi, string $roleCode): void
+    {
+        $assignmentId = (int) $this->input('selected_ktm_assignment_id');
+
+        if ($assignmentId <= 0) {
+            return;
+        }
+
+        if (! app(KtmVacancyService::class)->hasVacancyForAssignment($assignmentId, $pusatMengundi, $roleCode)) {
+            $validator->errors()->add(
+                'selected_ktm_assignment_id',
+                'KTM yang dipilih tidak sah atau kekosongan untuk jawatan ini telah penuh.',
+            );
+        }
+    }
+}