From eb26f31ed6ba7bf8f65cf68df278fe70554d8e76 Mon Sep 17 00:00:00 2001
From: Juan Pablo Vial <jpvial@goacegroup.com>
Date: Sat, 21 Dec 2024 18:59:55 -0300
Subject: [PATCH] Parsers

---
 app/src/Parser/Column.php     | 108 ++++++++++++++++++++++++++++++++++
 app/src/Parser/Constraint.php |  44 ++++++++++++++
 2 files changed, 152 insertions(+)
 create mode 100644 app/src/Parser/Column.php
 create mode 100644 app/src/Parser/Constraint.php

diff --git a/app/src/Parser/Column.php b/app/src/Parser/Column.php
new file mode 100644
index 0000000..fb1f91e
--- /dev/null
+++ b/app/src/Parser/Column.php
@@ -0,0 +1,108 @@
+<?php
+namespace ProVM\Parser;
+
+use ProVM\Concept;
+
+class Column implements Concept\Parser
+{
+    public function __construct(protected string $line) {}
+
+    public function parse(): string
+    {
+        return "->addColumn('{$this->getName()}', '{$this->getType()}'{$this->getOptions()})";
+    }
+
+    protected int $ini;
+    protected int $end;
+    protected array $parts;
+    protected array $options;
+
+    protected function getName(): string
+    {
+        $ini = $this->getIni();
+        $end = $this->getEnd();
+        return substr($this->line, $ini, $end - $ini);
+    }
+    protected function getType(): string
+    {
+        $parts = $this->getParts();
+        $type = array_shift($parts);
+
+        if (str_contains($type, '(')) {
+            list($type, $length) = explode('(', $type);
+            $this->options []= "'length' => " . rtrim($length, ')');
+        }
+        return match($type) {
+            'int' => 'integer',
+            'tinyint' => 'boolean',
+            'varchar' => 'string',
+            default => $type
+        };
+    }
+    protected function getOptions(): string
+    {
+        $parts = $this->getParts();
+        array_shift($parts);
+        $validOptions = [
+            'default' => function($parts) {
+                $i = array_search('default', array_map(function($part) {return strtolower($part);}, $parts));
+                return ['default', $parts[$i + 1]];
+            },
+            'null' => function($parts) {
+                $value = true;
+                $i = array_search('null', array_map(function($part) {return strtolower($part);}, $parts));
+                if (key_exists($i - 1, $parts) and strtolower($parts[$i - 1]) === 'not') {
+                    $value = false;
+                }
+                return ['null', $value];
+            },
+            'unsigned' => function($parts) {
+                return ['signed', false];
+            },
+            'auto_increment' => function($parts) {
+                return ['auto_increment', true];
+            }
+        ];
+        foreach ($validOptions as $validOption => $callable) {
+            if (str_contains(strtolower($this->line), $validOption)) {
+                list($option, $value) = $callable($parts);
+                if (strtolower($value) === 'null') {
+                    $value = 'null';
+                }
+                if ($value !== 'null' and !is_bool($value) and !ctype_digit($value)) {
+                    $value = trim($value, "'");
+                    $value = "'{$value}'";
+                }
+                if (is_bool($value)) {
+                    $value = $value ? 'true' : 'false';
+                }
+                $this->options []= "'{$option}' => {$value}";
+            }
+        }
+        if (count($this->options) === 0) {
+            return '';
+        }
+        return ', [' . implode(', ', $this->options) . ']';
+    }
+    protected function getIni(): int
+    {
+        if (!isset($this->ini)) {
+            $this->ini = strpos($this->line, '`') + 1;
+        }
+        return $this->ini;
+    }
+    protected function getEnd(): int
+    {
+        if (!isset($this->end)) {
+            $this->end = strpos($this->line, '`', $this->getIni());
+        }
+        return $this->end;
+    }
+    protected function getParts(): array
+    {
+        if (!isset($this->parts)) {
+            $this->parts = explode(' ', trim(substr($this->line, $this->getEnd() + 1), ' ,'));
+        }
+        return $this->parts;
+    }
+}
\ No newline at end of file
diff --git a/app/src/Parser/Constraint.php b/app/src/Parser/Constraint.php
new file mode 100644
index 0000000..f123518
--- /dev/null
+++ b/app/src/Parser/Constraint.php
@@ -0,0 +1,44 @@
+<?php
+namespace ProVM\Parser;
+
+use ProVM\Concept;
+
+class Constraint implements Concept\Parser
+{
+    public function __construct(protected string $line) {}
+
+    public function parse(): string
+    {
+        return "->addForeignKey({$this->getColumns()}, '{$this->getTable()}', {$this->getReferences()}, ['delete' => 'cascade', 'update' => 'cascade'])";
+    }
+
+    protected function getColumns(): string
+    {
+        $ini = strpos(strtolower($this->line), 'foreign key') + strlen('FOREIGN KEY ');
+        $ini = strpos($this->line, '(', $ini) + 1;
+        $end = strpos(strtolower($this->line), ' references', $ini + 1) - strlen(')');
+        return $this->getNames($ini, $end);
+    }
+    protected function getTable(): string
+    {
+        $ini = strpos(strtolower($this->line), 'references') + strlen('REFERENCES ') + 1;
+        $end = strpos($this->line, '`', $ini + 1);
+        return substr($this->line, $ini, $end - $ini);
+    }
+    protected function getReferences(): string
+    {
+        $ini = strpos($this->line, '(', strpos(strtolower($this->line), 'references')) + 1;
+        $end = strpos($this->line, ')', $ini);
+        return $this->getNames($ini, $end);
+    }
+    protected function getNames($ini, $end): string
+    {
+        $names = substr($this->line, $ini, $end - $ini);
+        if (!str_contains($names, ',')) {
+            return str_replace('`', "'", $names);
+        }
+        $names = explode(', ', $names);
+        $columns = array_map(function($name) {return str_replace('`', "'", $name);}, $names);
+        return '[' . implode(', ', $columns) . ']';
+    }
+}
\ No newline at end of file