ILIAS  release_5-3 Revision v5.3.23-19-g915713cf615
Static Public Member Functions | Static Private Member Functions
Gettext\Languages\FormulaConverter Class Reference

A helper class to convert a CLDR formula to a gettext formula. More...

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Static Public Member Functions

static convertFormula ($cldrFormula)
 Converts a formula from the CLDR representation to the gettext representation. More...
 

Static Private Member Functions

static convertAtom ($cldrAtom)
 Converts an atomic part of the CLDR formula to its gettext representation. More...
 
static expandAtom ($atom)
 Expands an atom containing a range (for instance: 'n == 1,3..5'). More...
 

Detailed Description

A helper class to convert a CLDR formula to a gettext formula.

Definition at line 9 of file FormulaConverter.php.

Member Function Documentation

◆ convertAtom()

static Gettext\Languages\FormulaConverter::convertAtom (   $cldrAtom)
staticprivate

Converts an atomic part of the CLDR formula to its gettext representation.

Parameters
string$cldrAtomThe CLDR formula atom to convert.
Exceptions
Exception
Returns
bool|string Returns true if the gettext will always evaluate to true, false if gettext will always evaluate to false, return the gettext formula otherwise.

Definition at line 70 of file FormulaConverter.php.

71 {
72 $m = null;
73 $gettextAtom = $cldrAtom;
74 $gettextAtom = str_replace(' = ', ' == ', $gettextAtom);
75 $gettextAtom = str_replace('i', 'n', $gettextAtom);
76 if (preg_match('/^n( % \d+)? (!=|==) \d+$/', $gettextAtom)) {
77 return $gettextAtom;
78 }
79 if (preg_match('/^n( % \d+)? (!=|==) \d+(,\d+|\.\.\d+)+$/', $gettextAtom)) {
80 return self::expandAtom($gettextAtom);
81 }
82 if (preg_match('/^(?:v|w)(?: % 10+)? == (\d+)(?:\.\.\d+)?$/', $gettextAtom, $m)) { // For gettext: v == 0, w == 0
83 return (intval($m[1]) === 0) ? true : false;
84 }
85 if (preg_match('/^(?:v|w)(?: % 10+)? != (\d+)(?:\.\.\d+)?$/', $gettextAtom, $m)) { // For gettext: v == 0, w == 0
86 return (intval($m[1]) === 0) ? false : true;
87 }
88 if (preg_match('/^(?:f|t)(?: % 10+)? == (\d+)(?:\.\.\d+)?$/', $gettextAtom, $m)) { // f == empty, t == empty
89 return (intval($m[1]) === 0) ? true : false;
90 }
91 if (preg_match('/^(?:f|t)(?: % 10+)? != (\d+)(?:\.\.\d+)?$/', $gettextAtom, $m)) { // f == empty, t == empty
92 return (intval($m[1]) === 0) ? false : true;
93 }
94 throw new Exception("Unable to convert the formula chunk '$cldrAtom' from CLDR to gettext");
95 }
Gettext\Languages\FormulaConverter\expandAtom
static expandAtom($atom)
Expands an atom containing a range (for instance: 'n == 1,3..5').
Definition: FormulaConverter.php:102
$m
$m
Definition: show_metadata.php:25

References $m, and Gettext\Languages\FormulaConverter\expandAtom().

Referenced by Gettext\Languages\FormulaConverter\convertFormula().

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◆ convertFormula()

static Gettext\Languages\FormulaConverter::convertFormula (   $cldrFormula)
static

Converts a formula from the CLDR representation to the gettext representation.

Parameters
string$cldrFormulaThe CLDR formula to convert.
Exceptions
Exception
Returns
bool|string Returns true if the gettext will always evaluate to true, false if gettext will always evaluate to false, return the gettext formula otherwise.

Definition at line 17 of file FormulaConverter.php.

18 {
19 if (strpbrk($cldrFormula, '()') !== false) {
20 throw new Exception("Unable to convert the formula '$cldrFormula': parenthesis handling not implemented");
21 }
22 $orSeparatedChunks = array();
23 foreach (explode(' or ', $cldrFormula) as $cldrFormulaChunk) {
24 $gettextFormulaChunk = null;
25 $andSeparatedChunks = array();
26 foreach (explode(' and ', $cldrFormulaChunk) as $cldrAtom) {
27 $gettextAtom = self::convertAtom($cldrAtom);
28 if ($gettextAtom === false) {
29 // One atom joined by 'and' always evaluates to false => the whole 'and' group is always false
30 $gettextFormulaChunk = false;
31 break;
32 } elseif ($gettextAtom !== true) {
33 $andSeparatedChunks[] = $gettextAtom;
34 }
35 }
36 if (!isset($gettextFormulaChunk)) {
37 if (empty($andSeparatedChunks)) {
38 // All the atoms joined by 'and' always evaluate to true => the whole 'and' group is always true
39 $gettextFormulaChunk = true;
40 } else {
41 $gettextFormulaChunk = implode(' && ', $andSeparatedChunks);
42 // Special cases simplification
43 switch ($gettextFormulaChunk) {
44 case 'n >= 0 && n <= 2 && n != 2':
45 $gettextFormulaChunk = 'n == 0 || n == 1';
46 break;
47 }
48 }
49 }
50 if ($gettextFormulaChunk === true) {
51 // One part of the formula joined with the others by 'or' always evaluates to true => the whole formula always evaluates to true
52 return true;
53 } elseif ($gettextFormulaChunk !== false) {
54 $orSeparatedChunks[] = $gettextFormulaChunk;
55 }
56 }
57 if (empty($orSeparatedChunks)) {
58 // All the parts joined by 'or' always evaluate to false => the whole formula always evaluates to false
59 return false;
60 } else {
61 return implode(' || ', $orSeparatedChunks);
62 }
63 }
Gettext\Languages\FormulaConverter\convertAtom
static convertAtom($cldrAtom)
Converts an atomic part of the CLDR formula to its gettext representation.
Definition: FormulaConverter.php:70

References Gettext\Languages\FormulaConverter\convertAtom().

Referenced by Gettext\Languages\Category\__construct().

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◆ expandAtom()

static Gettext\Languages\FormulaConverter::expandAtom (   $atom)
staticprivate

Expands an atom containing a range (for instance: 'n == 1,3..5').

Parameters
string$atom
Exceptions
Exception
Returns
string

Definition at line 102 of file FormulaConverter.php.

103 {
104 $m = null;
105 if (preg_match('/^(n(?: % \d+)?) (==|!=) (\d+(?:\.\.\d+|,\d+)+)$/', $atom, $m)) {
106 $what = $m[1];
107 $op = $m[2];
108 $chunks = array();
109 foreach (explode(',', $m[3]) as $range) {
110 $chunk = null;
111 if ((!isset($chunk)) && preg_match('/^\d+$/', $range)) {
112 $chunk = "$what $op $range";
113 }
114 if ((!isset($chunk)) && preg_match('/^(\d+)\.\.(\d+)$/', $range, $m)) {
115 $from = intval($m[1]);
116 $to = intval($m[2]);
117 if (($to - $from) === 1) {
118 switch ($op) {
119 case '==':
120 $chunk = "($what == $from || $what == $to)";
121 break;
122 case '!=':
123 $chunk = "$what != $from && $what == $to";
124 break;
125 }
126 } else {
127 switch ($op) {
128 case '==':
129 $chunk = "$what >= $from && $what <= $to";
130 break;
131 case '!=':
132 if ($what === 'n' && $from <= 0) {
133 $chunk = "$what > $to";
134 } else {
135 $chunk = "($what < $from || $what > $to)";
136 }
137 break;
138 }
139 }
140 }
141 if (!isset($chunk)) {
142 throw new Exception("Unhandled range '$range' in '$atom'");
143 }
144 $chunks[] = $chunk;
145 }
146 if (count($chunks) === 1) {
147 return $chunks[0];
148 }
149 switch ($op) {
150 case '==':
151 return '('.implode(' || ', $chunks).')';break;
152 case '!=':
153 return implode(' && ', $chunks);
154 }
155 }
156 throw new Exception("Unable to expand '$atom'");
157 }
$from
$from
Definition: logout-iframe.php:5

References $from, and $m.

Referenced by Gettext\Languages\FormulaConverter\convertAtom().

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The documentation for this class was generated from the following file: