Initial commit

common/database/Connection.php

@@ -0,0 +1,81 @@
+<?php
+
+namespace common\database;
+
+class Connection {
+    protected static $mysqli;
+
+    protected $config;
+
+    function __construct() {
+        $this->config = config('database');
+    }
+
+    public function connect() {
+        if ( !static::$mysqli ) {
+            static::$mysqli = new \mysqli(
+                $this->config['url'],
+                $this->config['username'],
+                $this->config['password'],
+                $this->config['database']
+            );
+        }
+
+        if ( static::$mysqli->connect_errno ) {
+            throw new \Exception('Unable to connect to database: ' . static::$mysqli->connect_error);
+        }
+    }
+
+    public function escape($value) {
+        return static::$mysqli->real_escape_string($value);
+    }
+
+    public function execute($query, $args = [], $returns_statement = false) {
+        $statement = static::$mysqli->prepare($query);
+
+        if ( sizeof($args) > 0 ) {
+            $types = '';
+            foreach ( $args as $arg ) {
+                if ( is_int($arg) ) {
+                    $types .= 'i';
+                } else if ( is_float($arg) || is_double($arg) ) {
+                    $types .= 'd';
+                } else if ( is_string($arg) ) {
+                    $types .= 's';
+                } else {
+                    $types .= 'b';
+                }
+            }
+
+            $statement->bind_param($types, ...$args);
+        }
+
+        $statement->execute();
+
+        if ( $returns_statement ) return $statement;
+        return $statement->get_result();
+    }
+
+    public function insert($query, $args = []) {
+        $statement = $this->execute($query, $args, true);
+        return $statement->insert_id;
+    }
+
+    public function fetch($query, $args = []) {
+        $result = $this->execute($query, $args);
+
+        $rows = [];
+        while ( $row = $result->fetch_assoc() ) {
+            $rows[] = $row;
+        }
+
+        return $rows;
+    }
+
+    public function close() {
+        if ( static::$mysqli ) {
+            static::$mysqli->close();
+            static::$mysqli = null;
+        }
+    }
+}

common/database/Repository.php

@@ -0,0 +1,134 @@
+<?php
+
+namespace common\database;
+
+class Repository {
+    protected $table;
+    protected $primary_key;
+    protected $fields = [];
+
+    protected $connection;
+
+    function __construct() {
+        $this->connection = new Connection();
+        $this->connection->connect();
+    }
+
+    function __destruct() {
+        $this->connection->close();
+    }
+
+    public function create($record) {
+        $fields = [];
+        $arg_parts = [];
+        $args = [];
+
+        foreach ( $this->fields as $field ) {
+            if ( isset($record[$field]) ) {
+                $fields[] = $field;
+                $args[] = $record[$field];
+                $arg_parts[] = '?';
+            }
+        }
+
+        $query = 'INSERT INTO ' . $this->table . ' (' . implode(', ', $fields) . ') VALUES (' . implode(', ', $arg_parts) . ')';
+        $insert_id = $this->connection->insert($query, $args);
+
+        $record[$this->primary_key] = $insert_id;
+        return $record;
+    }
+
+    public function find_by_id($primary_key) {
+        $query = 'SELECT ' . implode(', ', $this->fields) . ' FROM ' . $this->table . ' WHERE ' . $this->primary_key . ' = ?';
+        $results = $this->connection->fetch($query, [$primary_key]);
+
+        if ( sizeof($results) > 0 ) {
+            return $results[0];
+        }
+    }
+
+    public function find($filter = []) {
+        $query = 'SELECT ' . implode(', ', $this->fields) . ' FROM ' . $this->table . ' WHERE ';
+        list($wheres, $where_args) = $this->build_wheres_from_filter($filter);
+
+        $query .= implode(' AND ', $wheres);
+        $query .= ' ORDER BY ' . $this->primary_key . ' ASC';
+        return $this->connection->fetch($query, $where_args);
+    }
+
+    public function find_one($filter = []) {
+        $query = 'SELECT ' . implode(', ', $this->fields) . ' FROM ' . $this->table . ' WHERE ';
+        list($wheres, $where_args) = $this->build_wheres_from_filter($filter);
+
+        $query .= implode(' AND ', $wheres) . ' LIMIT 1';
+        $results = $this->connection->fetch($query, $where_args);
+
+        if ( sizeof($results) > 0 ) {
+            return $results[0];
+        }
+    }
+
+    public function update($record) {
+        $query = 'UPDATE ' . $this->table . ' SET ';
+        $query_args = [];
+
+        $sets = [];
+        foreach ( $this->fields as $field ) {
+            if ( isset($record[$field]) ) {
+                $sets[] = $field . '=?';
+                $query_args[] = $record[$field];
+            }
+        }
+
+        $query = 'UPDATE ' . $this->table . ' SET ' . implode(', ', $sets) . ' WHERE ' . $this->primary_key . ' = ?';
+        $query_args[] = $record[$this->primary_key];
+
+        $this->connection->execute($query, $query_args);
+        return $record;
+    }
+
+    public function save($record) {
+        if ( isset($record[$this->primary_key]) ) {
+            return $this->update($record);
+        } else {
+            return $this->create($record);
+        }
+    }
+
+    public function delete($record) {
+        $primary_key = $record[$this->primary_key];
+
+        $query = 'DELETE FROM ' . $this->table . ' WHERE ' . $this->primary_key . ' = ?';
+        $this->connection->execute($query, [$primary_key]);
+    }
+
+    protected function build_wheres_from_filter($filter = []) {
+        if ( !$filter ) {
+            return [['1=1'], []];
+        }
+
+        $wheres = [];
+        $where_args = [];
+        foreach ( $this->fields as $field ) {
+            if ( isset($filter[$field]) ) {
+                $val = $filter[$field];
+
+                if ( is_string($val) || is_numeric($val) ) {
+                    $wheres[] = $field . ' = ?';
+                    $where_args[] = $val;
+                } else if ( is_array($val) ) {
+                    $where_items = [];
+
+                    foreach ( $val as $item ) {
+                        $where_items[] = '?';
+                        $where_args[] = $item;
+                    }
+
+                    $wheres[] = $field . ' IN (' . implode(',', $where_items) . ')';
+                }
+            }
+        }
+
+        return [$wheres, $where_args];
+    }
+}