ORMRow.php

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<?php
abstract class ORMRow implements IORMRow {

        protected $fields = array( 'id' => null );

        protected $table;

        protected $updateSummaries = true;

        protected $inSummaryMode = false;

        public function __construct( IORMTable $table, $fields = null, $loadDefaults = false ) {
                $this->table = $table;

                if ( !is_array( $fields ) ) {
                        $fields = array();
                }

                if ( $loadDefaults ) {
                        $fields = array_merge( $this->table->getDefaults(), $fields );
                }

                $this->setFields( $fields );
        }

        public function loadFields( $fields = null, $override = true, $skipLoaded = false ) {
                if ( is_null( $this->getId() ) ) {
                        return false;
                }

                if ( is_null( $fields ) ) {
                        $fields = array_keys( $this->table->getFields() );
                }

                if ( $skipLoaded ) {
                        $fields = array_diff( $fields, array_keys( $this->fields ) );
                }

                if ( !empty( $fields ) ) {
                        $result = $this->table->rawSelectRow(
                                $this->table->getPrefixedFields( $fields ),
                                array( $this->table->getPrefixedField( 'id' ) => $this->getId() ),
                                array( 'LIMIT' => 1 )
                        );

                        if ( $result !== false ) {
                                $this->setFields( $this->table->getFieldsFromDBResult( $result ), $override );
                                return true;
                        }
                        return false;
                }

                return true;
        }

        public function getField( $name, $default = null ) {
                if ( $this->hasField( $name ) ) {
                        return $this->fields[$name];
                } elseif ( !is_null( $default ) ) {
                        return $default;
                } else {
                        throw new MWException( 'Attempted to get not-set field ' . $name );
                }
        }

        public function loadAndGetField( $name ) {
                if ( !$this->hasField( $name ) ) {
                        $this->loadFields( array( $name ) );
                }

                return $this->getField( $name );
        }

        public function removeField( $name ) {
                unset( $this->fields[$name] );
        }

        public function getId() {
                return $this->getField( 'id' );
        }

        public function setId( $id ) {
                $this->setField( 'id', $id );
        }

        public function hasField( $name ) {
                return array_key_exists( $name, $this->fields );
        }

        public function hasIdField() {
                return $this->hasField( 'id' )
                        && !is_null( $this->getField( 'id' ) );
        }

        public function setFields( array $fields, $override = true ) {
                foreach ( $fields as $name => $value ) {
                        if ( $override || !$this->hasField( $name ) ) {
                                $this->setField( $name, $value );
                        }
                }
        }

        protected function getWriteValues() {
                $values = array();

                foreach ( $this->table->getFields() as $name => $type ) {
                        if ( array_key_exists( $name, $this->fields ) ) {
                                $value = $this->fields[$name];

                                switch ( $type ) {
                                        case 'array':
                                                $value = (array)$value;
                                                // fall-through!
                                        case 'blob':
                                                $value = serialize( $value );
                                                // fall-through!
                                }

                                $values[$this->table->getPrefixedField( $name )] = $value;
                        }
                }

                return $values;
        }

        public function toArray( $fields = null, $incNullId = false ) {
                $data = array();
                $setFields = array();

                if ( !is_array( $fields ) ) {
                        $setFields = $this->getSetFieldNames();
                } else {
                        foreach ( $fields as $field ) {
                                if ( $this->hasField( $field ) ) {
                                        $setFields[] = $field;
                                }
                        }
                }

                foreach ( $setFields as $field ) {
                        if ( $incNullId || $field != 'id' || $this->hasIdField() ) {
                                $data[$field] = $this->getField( $field );
                        }
                }

                return $data;
        }

        public function loadDefaults( $override = true ) {
                $this->setFields( $this->table->getDefaults(), $override );
        }

        public function save( $functionName = null ) {
                if ( $this->hasIdField() ) {
                        return $this->saveExisting( $functionName );
                } else {
                        return $this->insert( $functionName );
                }
        }

        protected function saveExisting( $functionName = null ) {
                $dbw = $this->table->getWriteDbConnection();

                $success = $dbw->update(
                        $this->table->getName(),
                        $this->getWriteValues(),
                        $this->table->getPrefixedValues( $this->getUpdateConditions() ),
                        is_null( $functionName ) ? __METHOD__ : $functionName
                );

                $this->table->releaseConnection( $dbw );

                // DatabaseBase::update does not always return true for success as documented...
                return $success !== false;
        }

        protected function getUpdateConditions() {
                return array( 'id' => $this->getId() );
        }

        protected function insert( $functionName = null, array $options = null ) {
                $dbw = $this->table->getWriteDbConnection();

                $success = $dbw->insert(
                        $this->table->getName(),
                        $this->getWriteValues(),
                        is_null( $functionName ) ? __METHOD__ : $functionName,
                        $options
                );

                // DatabaseBase::insert does not always return true for success as documented...
                $success = $success !== false;

                if ( $success ) {
                        $this->setField( 'id', $dbw->insertId() );
                }

                $this->table->releaseConnection( $dbw );

                return $success;
        }

        public function remove() {
                $this->beforeRemove();

                $success = $this->table->delete( array( 'id' => $this->getId() ) );

                // DatabaseBase::delete does not always return true for success as documented...
                $success = $success !== false;

                if ( $success ) {
                        $this->onRemoved();
                }

                return $success;
        }

        protected function beforeRemove() {
                $this->loadFields( $this->getBeforeRemoveFields(), false, true );
        }

        protected function getBeforeRemoveFields() {
                return array();
        }

        protected function onRemoved() {
                $this->setField( 'id', null );
        }

        public function getFields() {
                return $this->fields;
        }

        public function getSetFieldNames() {
                return array_keys( $this->fields );
        }

        public function setField( $name, $value ) {
                $fields = $this->table->getFields();

                if ( array_key_exists( $name, $fields ) ) {
                        switch ( $fields[$name] ) {
                                case 'int':
                                        $value = (int)$value;
                                        break;
                                case 'float':
                                        $value = (float)$value;
                                        break;
                                case 'bool':
                                        if ( is_string( $value ) ) {
                                                $value = $value !== '0';
                                        } elseif ( is_int( $value ) ) {
                                                $value = $value !== 0;
                                        }
                                        break;
                                case 'array':
                                        if ( is_string( $value ) ) {
                                                $value = unserialize( $value );
                                        }

                                        if ( !is_array( $value ) ) {
                                                $value = array();
                                        }
                                        break;
                                case 'blob':
                                        if ( is_string( $value ) ) {
                                                $value = unserialize( $value );
                                        }
                                        break;
                                case 'id':
                                        if ( is_string( $value ) ) {
                                                $value = (int)$value;
                                        }
                                        break;
                        }

                        $this->fields[$name] = $value;
                } else {
                        throw new MWException( 'Attempted to set unknown field ' . $name );
                }
        }

        public function addToField( $field, $amount ) {
                if ( $amount == 0 ) {
                        return true;
                }

                if ( !$this->hasIdField() ) {
                        return false;
                }

                $absoluteAmount = abs( $amount );
                $isNegative = $amount < 0;

                $dbw = $this->table->getWriteDbConnection();

                $fullField = $this->table->getPrefixedField( $field );

                $success = $dbw->update(
                        $this->table->getName(),
                        array( "$fullField=$fullField" . ( $isNegative ? '-' : '+' ) . $absoluteAmount ),
                        array( $this->table->getPrefixedField( 'id' ) => $this->getId() ),
                        __METHOD__
                );

                if ( $success && $this->hasField( $field ) ) {
                        $this->setField( $field, $this->getField( $field ) + $amount );
                }

                $this->table->releaseConnection( $dbw );

                return $success;
        }

        public function getFieldNames() {
                return array_keys( $this->table->getFields() );
        }

        public function loadSummaryFields( $summaryFields = null ) {

        }

        public function setUpdateSummaries( $update ) {
                $this->updateSummaries = $update;
        }

        public function setSummaryMode( $summaryMode ) {
                $this->inSummaryMode = $summaryMode;
        }

        protected function fieldsChanged( IORMRow $object, $excludeSummaryFields = false ) {
                $exclusionFields = array();

                if ( $excludeSummaryFields !== false ) {
                        $exclusionFields = is_array( $excludeSummaryFields ) ? $excludeSummaryFields : $this->table->getSummaryFields();
                }

                foreach ( $this->fields as $name => $value ) {
                        $excluded = $excludeSummaryFields && in_array( $name, $exclusionFields );

                        if ( !$excluded && $object->getField( $name ) !== $value ) {
                                return true;
                        }
                }

                return false;
        }

        public function getTable() {
                return $this->table;
        }

}