Template.php (4570B) download
1<?php
2namespace Lollipop {
3use ErrorException;
4 Class Template{
5 function template(string $uri, array $data) : string{
6 /* this function takes a uri and a string array data */
7 /* opens a stream to the uri specified file and stores the content in $file*/
8
9 return $this->insert_data(file_get_contents($uri), $data);
10 }
11
12 private function insert_data(string $file, array $data):string{
13 $html = "";
14 $filesize = strlen($file);
15
16 for($i = 0; $i < $filesize-1; $i++){
17 if ($file[$i] == '{' && $file[$i + 1] == '{') {
18 for ($j = $i; $j < $filesize-1; $j++) {
19 if ($file[$j] == '}' && $file[$j + 1] == '}') {
20 $html .= $this->parse_template(trim(substr($file, $i + 2, $j - $i - 2)), $data);
21 $i = $j + 1;
22 break;
23 }
24 }
25 } else {
26 $html .= $file[$i];
27 }
28 }
29 return $html;
30 }
31
32 private function parse_template(string $expr, array $data) {
33 $tokens = [];
34 $in_string = false;
35 $buffer = '';
36
37 foreach (str_split($expr) as $c) {
38 if ($c == '"' && !$in_string) { // string start
39 $in_string = true;
40 } else if ($c == '"') { // string end
41 $tokens[] = $buffer;
42 $buffer = '';
43 $in_string = false;
44 } else if ($c == ' ' && !$in_string) {
45 if ($buffer) {
46 $tokens[] = $buffer;
47 $buffer = '';
48 }
49 } else {
50 $buffer .= $c;
51 }
52 }
53 if ($buffer)
54 $tokens[] = $buffer;
55
56 return $this->eval_tokens($tokens, $data);
57 }
58
59 private function eval_tokens(array $tokens, array $data) {
60 $funcs = [
61 "add" => function(array &$tokens) {
62 $right = array_pop($tokens);
63 $left = array_pop($tokens);
64
65 if (is_null($left) || is_null($right))
66 throw new ErrorException("Stack is empty");
67
68 return $left + $right;
69 },
70 "sub" => function(array &$tokens) {
71 $right = array_pop($tokens);
72 $left = array_pop($tokens);
73
74 if (is_null($left) || is_null($right))
75 throw new ErrorException("Stack is empty");
76
77 return intval($left) - intval($right);
78 },
79 "mul" => function(array &$tokens) {
80 $right = array_pop($tokens);
81 $left = array_pop($tokens);
82
83 if (is_null($left) || is_null($right))
84 throw new ErrorException("Stack is empty");
85
86 return intval($left) * intval($right);
87 },
88 "div" => function(array &$tokens) {
89 $right = array_pop($tokens);
90 $left = array_pop($tokens);
91
92 if (is_null($left) || is_null($right))
93 throw new ErrorException("Stack is empty");
94
95 return intval($left) / intval($right);
96 },
97 "cat" => function(array &$tokens) {
98 $right = array_pop($tokens);
99 $left = array_pop($tokens);
100
101 if (is_null($left) || is_null($right))
102 throw new ErrorException("Stack is empty");
103
104 return $left . $right;
105 },
106
107 "to_int" => function(array &$tokens) {
108 $val = array_pop($val);
109
110 if (is_null($val))
111 throw new ErrorException("Stack is empty");
112
113 return inval($val);
114 },
115
116 "include" => function (array &$tokens) {
117 $name = array_pop($tokens);
118
119 if ($name == null)
120 throw new ErrorException("Stack is empty");
121
122 include($name);
123 },
124 "eval" => function (array &$tokens) {
125 $expr = array_pop($tokens);
126
127 if (is_null($expr))
128 throw new ErrorException("Stack is empty");
129
130 return eval("return ($expr);");
131 },
132 "format_if" => function (array &$stack) {
133 $format_false = array_pop($stack);
134 $format_true = array_pop($stack);
135 $expr = array_pop($stack);
136
137 if (is_null($expr) || is_null($format_true) || is_null($format_false))
138 throw new ErrorException("Stack is empty");
139
140 if ($expr == "")
141 return $format_false;
142 else
143 return str_replace("%%", $expr, $format_true);
144 },
145 ];
146
147 $stack = [];
148 foreach ($tokens as $token) {
149 if ($token && $token[0] == '!') {
150 $val = $funcs[substr($token, 1)]($stack);
151 if (!is_null($val))
152 $stack[] = $val;
153 } else if ($token && $token[0] == '$') {
154 $stack[] = array_key_exists(substr($token, 1), $data) ? $data[substr($token, 1)] : "";
155 } else {
156 $stack[] = $token;
157 }
158 }
159
160 if (sizeof($stack) > 1)
161 throw new ErrorException("Stack-size is not 1");
162 if (sizeof($stack) == 0)
163 return "";
164 return $stack[0];
165 }
166 }
167}