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1 <?php
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2
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3 /*
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4 * This file is part of composer/semver.
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5 *
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6 * (c) Composer <https://github.com/composer>
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7 *
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8 * For the full copyright and license information, please view
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9 * the LICENSE file that was distributed with this source code.
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10 */
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11
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12 namespace Composer\Semver;
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13
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14 use Composer\Semver\Constraint\Constraint;
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15
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16 class Comparator
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17 {
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18 /**
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19 * Evaluates the expression: $version1 > $version2.
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20 *
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21 * @param string $version1
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22 * @param string $version2
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23 *
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24 * @return bool
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25 */
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26 public static function greaterThan($version1, $version2)
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27 {
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28 return self::compare($version1, '>', $version2);
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29 }
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30
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31 /**
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32 * Evaluates the expression: $version1 >= $version2.
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33 *
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34 * @param string $version1
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35 * @param string $version2
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36 *
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37 * @return bool
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38 */
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39 public static function greaterThanOrEqualTo($version1, $version2)
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40 {
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41 return self::compare($version1, '>=', $version2);
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42 }
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43
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44 /**
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45 * Evaluates the expression: $version1 < $version2.
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46 *
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47 * @param string $version1
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48 * @param string $version2
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49 *
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50 * @return bool
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51 */
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52 public static function lessThan($version1, $version2)
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53 {
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54 return self::compare($version1, '<', $version2);
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55 }
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56
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57 /**
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58 * Evaluates the expression: $version1 <= $version2.
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59 *
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60 * @param string $version1
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61 * @param string $version2
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62 *
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63 * @return bool
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64 */
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65 public static function lessThanOrEqualTo($version1, $version2)
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66 {
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67 return self::compare($version1, '<=', $version2);
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68 }
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69
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70 /**
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71 * Evaluates the expression: $version1 == $version2.
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72 *
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73 * @param string $version1
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74 * @param string $version2
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75 *
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76 * @return bool
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77 */
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78 public static function equalTo($version1, $version2)
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79 {
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80 return self::compare($version1, '==', $version2);
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81 }
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82
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83 /**
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84 * Evaluates the expression: $version1 != $version2.
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85 *
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86 * @param string $version1
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87 * @param string $version2
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88 *
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89 * @return bool
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90 */
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91 public static function notEqualTo($version1, $version2)
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92 {
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93 return self::compare($version1, '!=', $version2);
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94 }
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95
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96 /**
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97 * Evaluates the expression: $version1 $operator $version2.
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98 *
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99 * @param string $version1
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100 * @param string $operator
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101 * @param string $version2
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102 *
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103 * @return bool
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104 */
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105 public static function compare($version1, $operator, $version2)
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106 {
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107 $constraint = new Constraint($operator, $version2);
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108
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109 return $constraint->matches(new Constraint('==', $version1));
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110 }
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111 }
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