JArray.php

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<?php
namespace Ajax\service;

class JArray {

    public static function isAssociative($array) {
        return (array_values($array) !== $array);
    }

    public static function getValue($array, $key, $pos) {
        if (array_key_exists($key, $array)) {
            return $array[$key];
        }
        $values = array_values($array);
        if ($pos < sizeof($values))
            return $values[$pos];
    }

    public static function getConditionalValue($array, $key, $condition) {
        $result = NULL;
        if (array_key_exists($key, $array)) {
            $result = $array[$key];
            if ($condition($result) === true)
                return $result;
        }
        $values = array_values($array);
        foreach ($values as $val) {
            if ($condition($val) === true)
                return $val;
        }
        return $result;
    }

    public static function getDefaultValue($array, $key, $default = NULL) {
        if (array_key_exists($key, $array)) {
            return $array[$key];
        } else
            return $default;
    }

    public static function implode($glue, $pieces) {
        $result = "";
        if (\is_array($glue)) {
            $size = \sizeof($pieces);
            if ($size > 0) {
                for ($i = 0; $i < $size - 1; $i ++) {
                    $result .= $pieces[$i] . @$glue[$i];
                }
                $result .= $pieces[$size - 1];
            }
        } else {
            $result = \implode($glue, $pieces);
        }
        return $result;
    }

    public static function dimension($array) {
        if (\is_array(reset($array))) {
            $return = self::dimension(reset($array)) + 1;
        } else {
            $return = 1;
        }
        return $return;
    }

    public static function sortAssociative($array, $sortedKeys = array()) {
        $newArray = array();
        foreach ($sortedKeys as $key) {
            if (\array_key_exists($key, $array)) {
                $newArray[$key] = $array[$key];
            }
        }
        return $newArray;
    }

    public static function moveElementTo(&$array, $from, $to) {
        $result = false;
        if (isset($array)) {
            if (isset($array[$from])) {
                $out = array_splice($array, $from, 1);
                array_splice($array, $to, 0, $out);
                $result = true;
            }
        }
        return $result;
    }

    public static function swapElements(&$array, $index1, $index2) {
        $result = false;
        if (isset($array)) {
            if (isset($array[$index1]) && isset($array[$index2])) {
                $tmp = $array[$index1];
                $array[$index1] = $array[$index2];
                $array[$index2] = $tmp;
                $result = true;
            }
        }
        return $result;
    }

    public static function modelArray($objects, $identifierFunction = NULL, $modelFunction = NULL) {
        $result = [];
        if (isset($modelFunction) === false) {
            $modelFunction = "__toString";
        }
        if (isset($identifierFunction) === false) {
            foreach ($objects as $object) {
                $result[] = self::callFunction($object, $modelFunction);
            }
        } else {
            foreach ($objects as $object) {
                $result[self::callFunction($object, $identifierFunction)] = self::callFunction($object, $modelFunction);
            }
        }
        return $result;
    }

    private static function callFunction($object, $callback) {
        if (\is_string($callback))
            return \call_user_func(array(
                $object,
                $callback
            ), []);
        else if (\is_callable($callback)) {
            return $callback($object);
        }
    }

    public static function count($array) {
        if (\is_array($array)) {
            return \sizeof($array);
        }
        return 0;
    }

    public static function removeByKeys($array, $keys) {
        $assocKeys = [];
        foreach ($keys as $key) {
            $assocKeys[$key] = true;
        }
        return \array_diff_key($array, $assocKeys);
    }
}