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vendor/illuminate/database/SQLiteConnection.php

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+<?php
+
+namespace Illuminate\Database;
+
+use Exception;
+use Illuminate\Database\Query\Grammars\SQLiteGrammar as QueryGrammar;
+use Illuminate\Database\Query\Processors\SQLiteProcessor;
+use Illuminate\Database\Schema\Grammars\SQLiteGrammar as SchemaGrammar;
+use Illuminate\Database\Schema\SQLiteBuilder;
+use Illuminate\Database\Schema\SqliteSchemaState;
+use Illuminate\Filesystem\Filesystem;
+
+class SQLiteConnection extends Connection
+{
+    /**
+     * Create a new database connection instance.
+     *
+     * @param  \PDO|\Closure  $pdo
+     * @param  string  $database
+     * @param  string  $tablePrefix
+     * @param  array  $config
+     * @return void
+     */
+    public function __construct($pdo, $database = '', $tablePrefix = '', array $config = [])
+    {
+        parent::__construct($pdo, $database, $tablePrefix, $config);
+
+        $this->configureForeignKeyConstraints();
+        $this->configureBusyTimeout();
+        $this->configureJournalMode();
+        $this->configureSynchronous();
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getDriverTitle()
+    {
+        return 'SQLite';
+    }
+
+    /**
+     * Enable or disable foreign key constraints if configured.
+     *
+     * @return void
+     */
+    protected function configureForeignKeyConstraints(): void
+    {
+        $enableForeignKeyConstraints = $this->getConfig('foreign_key_constraints');
+
+        if ($enableForeignKeyConstraints === null) {
+            return;
+        }
+
+        $schemaBuilder = $this->getSchemaBuilder();
+
+        try {
+            $enableForeignKeyConstraints
+                ? $schemaBuilder->enableForeignKeyConstraints()
+                : $schemaBuilder->disableForeignKeyConstraints();
+        } catch (QueryException $e) {
+            if (! $e->getPrevious() instanceof SQLiteDatabaseDoesNotExistException) {
+                throw $e;
+            }
+        }
+    }
+
+    /**
+     * Set the busy timeout if configured.
+     *
+     * @return void
+     */
+    protected function configureBusyTimeout(): void
+    {
+        $milliseconds = $this->getConfig('busy_timeout');
+
+        if ($milliseconds === null) {
+            return;
+        }
+
+        try {
+            $this->getSchemaBuilder()->setBusyTimeout($milliseconds);
+        } catch (QueryException $e) {
+            if (! $e->getPrevious() instanceof SQLiteDatabaseDoesNotExistException) {
+                throw $e;
+            }
+        }
+    }
+
+    /**
+     * Set the journal mode if configured.
+     *
+     * @return void
+     */
+    protected function configureJournalMode(): void
+    {
+        $mode = $this->getConfig('journal_mode');
+
+        if ($mode === null) {
+            return;
+        }
+
+        try {
+            $this->getSchemaBuilder()->setJournalMode($mode);
+        } catch (QueryException $e) {
+            if (! $e->getPrevious() instanceof SQLiteDatabaseDoesNotExistException) {
+                throw $e;
+            }
+        }
+    }
+
+    /**
+     * Set the synchronous mode if configured.
+     *
+     * @return void
+     */
+    protected function configureSynchronous(): void
+    {
+        $mode = $this->getConfig('synchronous');
+
+        if ($mode === null) {
+            return;
+        }
+
+        try {
+            $this->getSchemaBuilder()->setSynchronous($mode);
+        } catch (QueryException $e) {
+            if (! $e->getPrevious() instanceof SQLiteDatabaseDoesNotExistException) {
+                throw $e;
+            }
+        }
+    }
+
+    /**
+     * Escape a binary value for safe SQL embedding.
+     *
+     * @param  string  $value
+     * @return string
+     */
+    protected function escapeBinary($value)
+    {
+        $hex = bin2hex($value);
+
+        return "x'{$hex}'";
+    }
+
+    /**
+     * Determine if the given database exception was caused by a unique constraint violation.
+     *
+     * @param  \Exception  $exception
+     * @return bool
+     */
+    protected function isUniqueConstraintError(Exception $exception)
+    {
+        return boolval(preg_match('#(column(s)? .* (is|are) not unique|UNIQUE constraint failed: .*)#i', $exception->getMessage()));
+    }
+
+    /**
+     * Get the default query grammar instance.
+     *
+     * @return \Illuminate\Database\Query\Grammars\SQLiteGrammar
+     */
+    protected function getDefaultQueryGrammar()
+    {
+        ($grammar = new QueryGrammar)->setConnection($this);
+
+        return $this->withTablePrefix($grammar);
+    }
+
+    /**
+     * Get a schema builder instance for the connection.
+     *
+     * @return \Illuminate\Database\Schema\SQLiteBuilder
+     */
+    public function getSchemaBuilder()
+    {
+        if (is_null($this->schemaGrammar)) {
+            $this->useDefaultSchemaGrammar();
+        }
+
+        return new SQLiteBuilder($this);
+    }
+
+    /**
+     * Get the default schema grammar instance.
+     *
+     * @return \Illuminate\Database\Schema\Grammars\SQLiteGrammar
+     */
+    protected function getDefaultSchemaGrammar()
+    {
+        ($grammar = new SchemaGrammar)->setConnection($this);
+
+        return $this->withTablePrefix($grammar);
+    }
+
+    /**
+     * Get the schema state for the connection.
+     *
+     * @param  \Illuminate\Filesystem\Filesystem|null  $files
+     * @param  callable|null  $processFactory
+     *
+     * @throws \RuntimeException
+     */
+    public function getSchemaState(?Filesystem $files = null, ?callable $processFactory = null)
+    {
+        return new SqliteSchemaState($this, $files, $processFactory);
+    }
+
+    /**
+     * Get the default post processor instance.
+     *
+     * @return \Illuminate\Database\Query\Processors\SQLiteProcessor
+     */
+    protected function getDefaultPostProcessor()
+    {
+        return new SQLiteProcessor;
+    }
+}