rudimentary export options

2018-07-29 20:19:19 +02:00
parent 3bf9b68503
commit 1037f438ce
15 changed files with 522 additions and 103 deletions
@@ -0,0 +1,119 @@
+<?php
+
+
+namespace App\Tables;
+
+
+use JsonSerializable;
+use MightyPork\Exceptions\NotApplicableException;
+use MightyPork\Utils\Utils;
+
+/**
+ * Helper class representing one column in a data table.
+ *
+ * @property-read string $name
+ * @property-read string $title
+ * @property-read string $type
+ */
+class Column implements JsonSerializable
+{
+    const colTypes = [
+        'int', 'bool', 'float', 'string'
+    ];
+
+    private $name;
+    private $title;
+    private $type;
+
+    public static function columnsFromJson($columns)
+    {
+        if (is_string($columns)) {
+            $columns = json_decode($columns);
+        }
+
+        return array_map(function ($x) {
+            return new Column($x);
+        }, $columns);
+    }
+
+    public function __get($name)
+    {
+        if (property_exists($this, $name)) {
+            return $this->$name;
+        }
+
+        throw new NotApplicableException("No such column property");
+    }
+
+    /**
+     * Create from object or array
+     *
+     * @param $obj
+     */
+    public function __construct($obj)
+    {
+        $b = new \objBag($obj);
+        $this->name = $b->name;
+        $this->title = $b->title;
+        $this->type = $b->type;
+
+        if (!in_array($this->type, self::colTypes)) {
+            throw new NotApplicableException("\"$this->type\" is not a valid column type.");
+        }
+    }
+
+    /**
+     * @return array with keys {name, title, type}
+     */
+    public function toArray()
+    {
+        return [
+            'name' => $this->name,
+            'title' => $this->title,
+            'type' => $this->type,
+        ];
+    }
+
+    /**
+     * Convert a value to the target type, validating it in the process
+     *
+     * @param mixed $value
+     * @return bool|float|int|string
+     */
+    public function cast($value)
+    {
+        switch ($this->type) {
+            case 'int':
+                if (is_int($value)) return $value;
+                if (is_float($value)) return round($value);
+                if (is_numeric($value)) return intval($value);
+                throw new NotApplicableException("Could not convert value \"$value\" to int!");
+
+            case 'float':
+                if (is_int($value) || is_float($value)) return (float)$value;
+                if (is_numeric($value)) return floatval($value);
+                throw new NotApplicableException("Could not convert value \"$value\" to float!");
+
+            case 'bool':
+                return Utils::parseBool($value);
+
+            case 'string':
+                return "$value";
+
+            default:
+                throw new \LogicException("Illegal column type: \"$this->type\"");
+        }
+    }
+
+    /**
+     * Specify data which should be serialized to JSON
+     * @link http://php.net/manual/en/jsonserializable.jsonserialize.php
+     * @return mixed data which can be serialized by <b>json_encode</b>,
+     * which is a value of any type other than a resource.
+     * @since 5.4.0
+     */
+    public function jsonSerialize()
+    {
+        return $this->toArray();
+    }
+}