1: <?php
  2: 
  3: namespace Deimos\Flow;
  4: 
  5: class ForeachState
  6: {
  7: 
  8:     /**
  9:      * @var string
 10:      */
 11:     protected $_iteration;
 12: 
 13:     /**
 14:      * @var string
 15:      */
 16:     protected $_key;
 17: 
 18:     /**
 19:      * @var string
 20:      */
 21:     protected $_firstKey;
 22: 
 23:     /**
 24:      * @var string
 25:      */
 26:     protected $_lastKey;
 27: 
 28:     /**
 29:      * @var string
 30:      */
 31:     protected $_total;
 32: 
 33:     /**
 34:      * @var array
 35:      */
 36:     protected $storage;
 37: 
 38:     /**
 39:      * State constructor.
 40:      *
 41:      * @param array $storage
 42:      */
 43:     public function __construct(array &$storage)
 44:     {
 45:         $this->storage = &$storage;
 46:         $this->_total  = count($storage);
 47: 
 48:         $this->_iteration = 0;
 49:         $this->_key       = key($storage);
 50:         $this->_firstKey  = key($storage);
 51: 
 52:         end($storage);
 53:         $this->_lastKey = key($storage);
 54: 
 55:         reset($storage);
 56:     }
 57: 
 58:     /**
 59:      * @param $name
 60:      *
 61:      * @return mixed
 62:      */
 63:     public function __get($name)
 64:     {
 65:         return $this->{$name}();
 66:     }
 67: 
 68:     /**
 69:      * @param $name
 70:      * @param $value
 71:      *
 72:      * @throws \BadFunctionCallException
 73:      */
 74:     public function __set($name, $value)
 75:     {
 76:         throw new \BadFunctionCallException(__METHOD__);
 77:     }
 78: 
 79:     /**
 80:      * @param $name
 81:      *
 82:      * @return bool
 83:      */
 84:     public function __isset($name)
 85:     {
 86:         return method_exists($this, $name);
 87:     }
 88: 
 89:     /**
 90:      * @return bool
 91:      */
 92:     public function odd()
 93:     {
 94:         return !$this->even();
 95:     }
 96: 
 97:     /**
 98:      * @return bool
 99:      */
100:     public function even()
101:     {
102:         return !($this->iteration() & 1);
103:     }
104: 
105:     /**
106:      * @return bool
107:      */
108:     public function isFirst()
109:     {
110:         return $this->key() === $this->firstKey();
111:     }
112: 
113:     /**
114:      * @return bool
115:      */
116:     public function first()
117:     {
118:         return $this->isFirst();
119:     }
120: 
121:     /**
122:      * @return bool
123:      */
124:     public function isLast()
125:     {
126:         return $this->key() === $this->lastKey();
127:     }
128: 
129:     /**
130:      * @return bool
131:      */
132:     public function last()
133:     {
134:         return $this->isLast();
135:     }
136: 
137:     /**
138:      * @return int
139:      */
140:     public function iteration()
141:     {
142:         return $this->_iteration;
143:     }
144: 
145:     /**
146:      * @return string|int
147:      */
148:     public function key()
149:     {
150:         return $this->_key;
151:     }
152: 
153:     /**
154:      * @return mixed
155:      */
156:     public function value()
157:     {
158:         return $this->storage[$this->key()];
159:     }
160: 
161:     /**
162:      * @return string|int
163:      */
164:     public function firstKey()
165:     {
166:         return $this->_firstKey;
167:     }
168: 
169:     /**
170:      * @return string|int
171:      */
172:     public function lastKey()
173:     {
174:         return $this->_lastKey;
175:     }
176: 
177:     /**
178:      * @return mixed
179:      */
180:     public function firstValue()
181:     {
182:         return $this->storage[$this->firstKey()];
183:     }
184: 
185:     /**
186:      * @return mixed
187:      */
188:     public function lastValue()
189:     {
190:         return $this->storage[$this->lastKey()];
191:     }
192: 
193:     /**
194:      * @return int
195:      */
196:     public function total()
197:     {
198:         return $this->_total;
199:     }
200: 
201:     /**
202:      * @param $key
203:      */
204:     public function __invoke($key)
205:     {
206:         $this->_key = $key;
207:     }
208: 
209: }