xref: /webtrees/app/Validator.php (revision 45ebc6c6221f90468111ed2015b8449dca331d93) 
1<?php
2
3/**
4 * webtrees: online genealogy
5 * Copyright (C) 2022 webtrees development team
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <https://www.gnu.org/licenses/>.
16 */
17
18declare(strict_types=1);
19
20namespace Fisharebest\Webtrees;
21
22use Aura\Router\Route;
23use Closure;
24use Fisharebest\Webtrees\Contracts\UserInterface;
25use Fisharebest\Webtrees\Http\Exceptions\HttpBadRequestException;
26use Psr\Http\Message\ServerRequestInterface;
27
28use function array_reduce;
29use function array_walk_recursive;
30use function ctype_digit;
31use function in_array;
32use function is_array;
33use function is_int;
34use function is_string;
35use function parse_url;
36use function preg_match;
37use function str_starts_with;
38use function substr;
39
40/**
41 * Validate a parameter from an HTTP request
42 */
43class Validator
44{
45    /** @var array<int|string|Tree|UserInterface|array<int|string>> */
46    private array $parameters;
47
48    private ServerRequestInterface $request;
49
50    /** @var array<Closure> */
51    private array $rules = [];
52
53    /**
54     * @param array<int|string|Tree|UserInterface|array<int|string>> $parameters
55     * @param ServerRequestInterface                                 $request
56     */
57    public function __construct(array $parameters, ServerRequestInterface $request)
58    {
59        // All keys and values must be valid UTF-8
60        $check_utf8 = static function ($value, $key): void {
61            if (is_string($key) && preg_match('//u', $key) !== 1) {
62                throw new HttpBadRequestException('Invalid UTF-8 characters in request');
63            }
64            if (is_string($value) && preg_match('//u', $value) !== 1) {
65                throw new HttpBadRequestException('Invalid UTF-8 characters in request');
66            }
67        };
68
69        array_walk_recursive($parameters, $check_utf8);
70
71        $this->parameters = $parameters;
72        $this->request    = $request;
73    }
74
75    /**
76     * @param ServerRequestInterface $request
77     *
78     * @return self
79     */
80    public static function attributes(ServerRequestInterface $request): self
81    {
82        return new self($request->getAttributes(), $request);
83    }
84
85    /**
86     * @param ServerRequestInterface $request
87     *
88     * @return self
89     */
90    public static function parsedBody(ServerRequestInterface $request): self
91    {
92        return new self((array) $request->getParsedBody(), $request);
93    }
94
95    /**
96     * @param ServerRequestInterface $request
97     *
98     * @return self
99     */
100    public static function queryParams(ServerRequestInterface $request): self
101    {
102        return new self($request->getQueryParams(), $request);
103    }
104
105    /**
106     * @param ServerRequestInterface $request
107     *
108     * @return self
109     */
110    public static function serverParams(ServerRequestInterface $request): self
111    {
112        return new self($request->getServerParams(), $request);
113    }
114
115    /**
116     * @param int $minimum
117     * @param int $maximum
118     *
119     * @return self
120     */
121    public function isBetween(int $minimum, int $maximum): self
122    {
123        $this->rules[] = static function (?int $value) use ($minimum, $maximum): ?int {
124            if (is_int($value) && $value >= $minimum && $value <= $maximum) {
125                return $value;
126            }
127
128            return null;
129        };
130
131        return $this;
132    }
133
134    /**
135     * @param array<string> $values
136     *
137     * @return self
138     */
139    public function isInArray(array $values): self
140    {
141        $this->rules[] = static fn (/*int|string|null*/ $value)/*: int|string|null*/ => $value !== null && in_array($value, $values, true) ? $value : null;
142
143        return $this;
144    }
145
146    /**
147     * @param array<string> $values
148     *
149     * @return self
150     */
151    public function isInArrayKeys(array $values): self
152    {
153        return $this->isInArray(array_keys($values));
154    }
155
156    /**
157     * @return self
158     */
159    public function isNotEmpty(): self
160    {
161        $this->rules[] = static fn (?string $value): ?string => $value !== null && $value !== '' ? $value : null;
162
163        return $this;
164    }
165
166    /**
167     * @return self
168     */
169    public function isLocalUrl(): self
170    {
171        $base_url = $this->request->getAttribute('base_url', '');
172
173        $this->rules[] = static function (?string $value) use ($base_url): ?string {
174            if ($value !== null) {
175                $value_info    = parse_url($value);
176                $base_url_info = parse_url($base_url);
177
178                if (is_array($value_info) && is_array($base_url_info)) {
179                    $scheme_ok = ($value_info['scheme'] ?? 'http') === ($base_url_info['scheme'] ?? 'http');
180                    $host_ok   = ($value_info['host'] ?? '') === ($base_url_info['host'] ?? '');
181                    $port_ok   = ($value_info['port'] ?? '') === ($base_url_info['port'] ?? '');
182                    $user_ok   = ($value_info['user'] ?? '') === ($base_url_info['user'] ?? '');
183                    $path_ok   = str_starts_with($value_info['path'] ?? '/', $base_url_info['path'] ?? '/');
184
185                    if ($scheme_ok && $host_ok && $port_ok && $user_ok && $path_ok) {
186                        return $value;
187                    }
188                }
189            }
190
191            return null;
192        };
193
194        return $this;
195    }
196
197    /**
198     * @return self
199     */
200    public function isTag(): self
201    {
202        $this->rules[] = static function (?string $value): ?string {
203            if ($value !== null && preg_match('/^' . Gedcom::REGEX_TAG . '$/', $value) === 1) {
204                return $value;
205            }
206
207            return null;
208        };
209
210        return $this;
211    }
212
213    /**
214     * @return self
215     */
216    public function isXref(): self
217    {
218        $this->rules[] = static function ($value) {
219            if (is_string($value) && preg_match('/^' . Gedcom::REGEX_XREF . '$/', $value) === 1) {
220                return $value;
221            }
222
223            if (is_array($value)) {
224                return array_filter($value, static fn ($x): bool => is_string($x) && preg_match('/^' . Gedcom::REGEX_XREF . '$/', $x) === 1);
225            }
226
227            return null;
228        };
229
230        return $this;
231    }
232
233    /**
234     * @param string    $parameter
235     * @param bool|null $default
236     *
237     * @return bool
238     */
239    public function boolean(string $parameter, bool $default = null): bool
240    {
241        $value = $this->parameters[$parameter] ?? null;
242
243        if (in_array($value, ['1', 'on', true], true)) {
244            return true;
245        }
246
247        if (in_array($value, ['0', '', false], true)) {
248            return false;
249        }
250
251        if ($default === null) {
252            throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
253        }
254
255        return $default;
256    }
257
258    /**
259     * @param string $parameter
260     *
261     * @return array<string>
262     */
263    public function array(string $parameter): array
264    {
265        $value = $this->parameters[$parameter] ?? null;
266
267        if (!is_array($value) && $value !== null) {
268            throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
269        }
270
271        $callback = static fn (?array $value, Closure $rule): ?array => $rule($value);
272
273        return array_reduce($this->rules, $callback, $value) ?? [];
274    }
275
276    /**
277     * @param string   $parameter
278     * @param int|null $default
279     *
280     * @return int
281     */
282    public function integer(string $parameter, int $default = null): int
283    {
284        $value = $this->parameters[$parameter] ?? null;
285
286        if (is_string($value)) {
287            if (ctype_digit($value)) {
288                $value = (int) $value;
289            } elseif (str_starts_with($value, '-') && ctype_digit(substr($value, 1))) {
290                $value = (int) $value;
291            }
292        }
293
294        if (!is_int($value)) {
295            $value = null;
296        }
297
298        $callback = static fn (?int $value, Closure $rule): ?int => $rule($value);
299
300        $value = array_reduce($this->rules, $callback, $value) ?? $default;
301
302        if ($value === null) {
303            throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
304        }
305
306        return $value;
307    }
308
309    /**
310     * @param string $parameter
311     *
312     * @return Route
313     */
314    public function route(string $parameter = 'route'): Route
315    {
316        $value = $this->parameters[$parameter] ?? null;
317
318        if ($value instanceof Route) {
319            return $value;
320        }
321
322        throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
323    }
324
325    /**
326     * @param string      $parameter
327     * @param string|null $default
328     *
329     * @return string
330     */
331    public function string(string $parameter, string $default = null): string
332    {
333        $value = $this->parameters[$parameter] ?? null;
334
335        if (!is_string($value)) {
336            $value = null;
337        }
338
339        $callback = static fn (?string $value, Closure $rule): ?string => $rule($value);
340
341        $value =  array_reduce($this->rules, $callback, $value) ?? $default;
342
343        if ($value === null) {
344            throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
345        }
346
347        return $value;
348    }
349
350    /**
351     * @param string $parameter
352     *
353     * @return Tree
354     */
355    public function tree(string $parameter = 'tree'): Tree
356    {
357        $value = $this->parameters[$parameter] ?? null;
358
359        if ($value instanceof Tree) {
360            return $value;
361        }
362
363        throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
364    }
365
366    /**
367     * @param string $parameter
368     *
369     * @return Tree|null
370     */
371    public function treeOptional(string $parameter = 'tree'): ?Tree
372    {
373        $value = $this->parameters[$parameter] ?? null;
374
375        if ($value === null || $value instanceof Tree) {
376            return $value;
377        }
378
379        throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
380    }
381
382    /**
383     * @param string $parameter
384     *
385     * @return UserInterface
386     */
387    public function user(string $parameter = 'user'): UserInterface
388    {
389        $value = $this->parameters[$parameter] ?? null;
390
391        if ($value instanceof UserInterface) {
392            return $value;
393        }
394
395        throw new HttpBadRequestException(I18N::translate('The parameter “%s” is missing.', $parameter));
396    }
397}
398