frontend and backend

backend/src/Service/Preg.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregResponse;
+use App\Entity\PregDTO;
+
+class Preg
+{
+    private string $hash;
+
+    public function __construct(private readonly PregDTO $dto)
+    {
+        $this->hash = base_convert(substr(hash('sha256', serialize($this->dto)), 0, 10), 16, 36);
+    }
+
+    public function exec(): PregResponse
+    {
+        //if ($this->dto->pattern === '') {
+        //    return new PregResponse();
+        //}
+
+        $cn = 'App\Service\Preg'.$this->dto->method->name;
+        return (new $cn($this->dto))->exec();
+    }
+
+    protected function exec_preg_match(): array
+    {
+        $ret = @preg_match($this->dto->pattern, $this->dto->subject, $matches, $this->flags, $this->dto->offset);
+
+        $error = $this->last_error();
+
+        return array_merge($this->result($ret), [
+            "dump" => $error?: $matches,
+            "error" => (bool)$error,
+            "code" => $this->syntax()
+        ]);
+    }
+
+    protected function exec_preg_match_all(): array
+    {
+        $ret = @preg_match_all($this->pattern, $this->subject, $matches, $this->flags, $this->offset);
+
+        $error = $this->last_error();
+
+        return array_merge($this->result($ret), [
+            "dump" => $error?: $matches,
+            "error" => (bool)$error,
+            "code" => $this->syntax()
+        ]);
+    }
+
+    protected function exec_preg_split()
+    {
+        $ret = @preg_split($this->pattern, $this->subject, $this->limit, $this->flags);
+
+        $error = $this->last_error();
+
+        return array_merge($this->result($ret), [
+            "dump" => $error?: $ret,
+            "error" => (bool)$error,
+            "code" => $this->syntax()
+        ]);
+    }
+
+    protected function exec_preg_replace()
+    {
+        $ret = @preg_replace($this->pattern, $this->replacement, $this->subject, $this->limit);
+
+        $error = $this->last_error();
+
+        return array_merge($this->result($ret), [
+            "dump" => $error?: $ret,
+            "error" => (bool)$error,
+            "code" => $this->syntax()
+        ]);
+    }
+
+    protected function exec_preg_quote()
+    {
+        $ret = @preg_quote($this->pattern, $this->delimeter);
+
+        $error = $this->last_error();
+
+        return array_merge($this->result($ret), [
+            "dump" => $error?: $ret,
+            "error" => (bool)$error,
+            "code" => $this->syntax()
+        ]);
+    }
+
+    public function getHash(): string
+    {
+        return $this->hash;
+    }
+}

backend/src/Service/PregFunction.php

@@ -0,0 +1,84 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregDTO;
+use App\Entity\PregResponse;
+use App\Resource\Flags;
+
+/**
+ * Base class for all Preg* methods.
+ */
+abstract class PregFunction
+{
+    /**
+     * Build on construction to pass the flags to each preg function.
+     */
+    protected int $flags = 0;
+
+    /**
+     * Flag list as string for future representation, based on $flags.
+     */
+    protected array $flagsStr = [];
+
+    /**
+     * Available flags for each function.
+     * @var array<Flags>
+     */
+    protected array $availableFlags = [];
+
+    abstract public function exec(): PregResponse;
+    abstract protected function syntax(): string;
+
+    public function __construct(protected readonly PregDTO $dto)
+    {
+        foreach ($this->availableFlags as $flag) {
+            if ($this->dto->{$flag->name}) {
+                $this->flags |= \constant($flag->name);
+                $this->flagsStr[] = $flag->name;
+            }
+        }
+    }
+
+    protected function result(mixed $ret): array
+    {
+        $gettype = \gettype($ret);
+        $return = [$gettype];
+
+        if (\in_array($gettype, ["boolean", "integer", "NULL"])) {
+            $return[] = json_encode($ret);
+
+        } elseif ($gettype === 'string') {
+            $return[] = "len(". mb_strlen($ret). ")";
+
+        } elseif ($gettype === 'array') {
+            $return[] = "count(". count($ret). ")";
+        }
+
+        return $return;
+    }
+
+    /**
+     * Can be used to remove some parts from the syntax() output.
+     * @see syntax()
+     */
+    protected function syntaxCleanup(string $code): string
+    {
+        return str_replace(
+            ['?&gt;', '&lt;?php&nbsp;', '&nbsp;', '<code>', '</code>'],
+            ['', '', ' ', '', ''],
+            highlight_string('<?php '. $code .' ?'.'>', true)
+        );
+    }
+
+    protected function cropString(string $str, int $len = 50, bool $quote = true, string $longText = '$subject'): string
+    {
+        if (mb_strlen($str, "utf-8") < $len) {
+            return $quote? '"'. addslashes($str) .'"': $str;
+        }
+        return $longText;
+        //return str_replace(["\r", "\n"], ['\r', '\n'], addslashes(mb_substr($str, 0, $len, "utf-8")). "...");
+    }
+}

backend/src/Service/PregMatch.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregResponse;
+use App\Resource\Flags;
+
+/**
+ * Handler form preg_match() function.
+ * @see preg_match()
+ */
+class PregMatch extends PregFunction
+{
+    protected array $availableFlags = [Flags::PREG_OFFSET_CAPTURE, Flags::PREG_UNMATCHED_AS_NULL];
+
+    public function exec(): PregResponse
+    {
+        $ret = preg_match($this->dto->pattern, $this->dto->subject, $matches, $this->flags, $this->dto->offset ?? 0);
+
+        return new PregResponse(
+            $matches,
+            $this->syntax(),
+            ...$this->result($ret)
+        );
+    }
+
+    protected function syntax(): string
+    {
+        $method = $this->dto->method->value;
+        $args = [$method .'("'. $this->dto->pattern.'"'];
+
+        $args[] = $this->cropString($this->dto->subject);
+        $args[] = '$matches';
+
+        if (\count($this->flagsStr)) {
+            $args[] = implode(' | ', $this->flagsStr);
+        }
+
+        if (!\is_null($this->dto->offset)) {
+            $args[] = (!\count($this->flagsStr)? 'null, ': ''). $this->dto->offset;
+        }
+
+        $code = implode(", ", $args). ");";
+
+        return $this->syntaxCleanup($code);
+    }
+}

backend/src/Service/PregMatchAll.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregResponse;
+use App\Resource\Flags;
+
+/**
+ * Handler form preg_match_all() function. This handler is very similar to PregMatch, same syntax.
+ * @see preg_match_all()
+ */
+class PregMatchAll extends PregMatch
+{
+    protected array $availableFlags = [Flags::PREG_SET_ORDER, Flags::PREG_OFFSET_CAPTURE, Flags::PREG_UNMATCHED_AS_NULL];
+
+    public function exec(): PregResponse
+    {
+        $ret = preg_match_all($this->dto->pattern, $this->dto->subject, $matches, $this->flags, $this->dto->offset ?? 0);
+
+        return new PregResponse(
+               $matches,
+               $this->syntax(),
+            ...$this->result($ret)
+        );
+    }
+}

backend/src/Service/PregQuote.php

@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregResponse;
+
+/**
+ * Handler form preg_quote() function.
+ * @see preg_quote()
+ */
+class PregQuote extends PregFunction
+{
+    public function exec(): PregResponse
+    {
+        $ret = preg_quote($this->dto->pattern, $this->dto->delimiter);
+
+        return new PregResponse(
+               $ret,
+               $this->syntax(),
+            ...$this->result($ret)
+        );
+    }
+
+    protected function syntax(): string
+    {
+        $args = [$this->dto->method->value .'("'. $this->dto->pattern.'"'];
+
+        if (!\is_null($this->dto->delimiter) && $this->dto->delimiter !== '') {
+            $args[] = $this->cropString($this->dto->delimiter);
+        }
+
+        $code = implode(", ", $args). ");";
+
+        return $this->syntaxCleanup($code);
+    }
+}

backend/src/Service/PregReplace.php

@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregResponse;
+
+/**
+ * Handler form preg_replace() function.
+ * @see preg_replace()
+ */
+class PregReplace extends PregFunction
+{
+    public function exec(): PregResponse
+    {
+        $ret = preg_replace($this->dto->pattern, $this->dto->replacement, $this->dto->subject, $this->dto->limit ?? -1);
+
+        return new PregResponse(
+               $ret,
+               $this->syntax(),
+            ...$this->result($ret)
+        );
+    }
+
+    protected function syntax(): string
+    {
+        $args = [$this->dto->method->value .'("'. $this->dto->pattern.'"'];
+
+        $args[] = $this->cropString($this->dto->replacement, longText: '$replacement');
+        $args[] = $this->cropString($this->dto->subject);
+
+        if (!\is_null($this->dto->limit)) {
+            $args[] = $this->dto->limit;
+        }
+
+        $code = implode(", ", $args). ");";
+
+        return $this->syntaxCleanup($code);
+    }
+}

backend/src/Service/PregSplit.php

@@ -0,0 +1,49 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Service;
+
+use App\Entity\PregResponse;
+use App\Resource\Flags;
+
+/**
+ * Handler form preg_split() function.
+ * @see preg_split()
+ */
+class PregSplit extends PregFunction
+{
+    protected array $availableFlags = [Flags::PREG_SPLIT_NO_EMPTY, Flags::PREG_SPLIT_DELIM_CAPTURE, Flags::PREG_SPLIT_OFFSET_CAPTURE];
+
+    public function exec(): PregResponse
+    {
+        $ret = preg_split($this->dto->pattern, $this->dto->subject, $this->dto->limit ?? -1, $this->flags);
+
+        return new PregResponse(
+               $ret,
+               $this->syntax(),
+            ...$this->result($ret)
+        );
+    }
+
+    protected function syntax(): string
+    {
+        $method = $this->dto->method->value;
+        $args = [$method .'("'. $this->dto->pattern.'"'];
+
+        $args[] = $this->cropString($this->dto->subject);
+
+        if (!\is_null($this->dto->limit)) {
+            $args[] = $this->dto->limit;
+        }
+
+        if (\count($this->flagsStr)) {
+            $args[] = (\is_null($this->dto->limit)? 'null, ': ''). implode(' | ', $this->flagsStr);
+        }
+
+
+        $code = implode(", ", $args). ");";
+
+        return $this->syntaxCleanup($code);
+    }
+}