init

app/Filters/ApiFilter.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace App\Filters;
+
+use Illuminate\Http\Request;
+
+class ApiFilter {
+    protected $safeParms = [];
+
+    protected $columnMap = [];
+
+    protected $operatorMap = [];
+
+    public function transform(Request $request) {
+        $eloQuery = [];
+
+        foreach ($this->safeParms as $parm => $operators) {
+            $query = $request->query($parm);
+        
+            if (!isset($query)) {
+                continue;
+            }
+
+            $column = $this->columnMap[$parm] ?? $parm;
+
+            foreach ($operators as $operator) {
+                if (isset($query[$operator])) {
+                    $eloQuery[] = [$column, $this->operatorMap[$operator], $query[$operator]];
+                }
+            }
+        }
+
+        return $eloQuery;
+    }
+
+}

app/Filters/CityFilter.php

@@ -0,0 +1,26 @@
+<?php
+
+namespace App\Filters;
+
+use App\Filters\ApiFilter;
+
+class CityFilter extends ApiFilter {
+    protected $safeParms = [
+        'locationName' => ['eq'],
+        'locationCountry' => ['eq'],
+        'id' => ['eq']
+    ];
+
+    protected $columnMap = [
+        'locationName' => 'location_name',
+        'locationCountry' => 'location_country'
+    ];
+
+    protected $operatorMap = [
+        'eq' => '=',
+        'lt' => '<',
+        'lte' => '<=',
+        'gt' => '>',
+        'gte' => '>=',
+    ];
+}