chore: update document approval workflow and bug fixes

Modules/ProjectManagement/app/Models/TaskMaterial.php

@@ -0,0 +1,63 @@
+<?php
+
+namespace Modules\ProjectManagement\Models;
+
+use App\Traits\HasPublicIdentifier;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Modules\MasterData\Models\Material;
+
+class TaskMaterial extends Model
+{
+    use HasPublicIdentifier;
+
+    protected $fillable = [
+        'task_id',
+        'material_id',
+        'planned_qty',
+        'actual_qty',
+        'unit_cost',
+        'notes',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'planned_qty' => 'decimal:2',
+            'actual_qty' => 'decimal:2',
+            'unit_cost' => 'decimal:2',
+        ];
+    }
+
+    public function task(): BelongsTo
+    {
+        return $this->belongsTo(Task::class);
+    }
+
+    public function material(): BelongsTo
+    {
+        return $this->belongsTo(Material::class);
+    }
+
+
+
+    public function getPlannedCostAttribute(): float
+    {
+        return (float) $this->planned_qty * (float) $this->unit_cost;
+    }
+
+    public function getActualCostAttribute(): float
+    {
+        return (float) $this->actual_qty * (float) $this->unit_cost;
+    }
+
+    public function getEffectiveCostAttribute(): float
+    {
+        return $this->actual_qty > 0 ? $this->actual_cost : $this->planned_cost;
+    }
+
+    public function getVarianceAttribute(): float
+    {
+        return $this->planned_cost - $this->actual_cost;
+    }
+}