HTMLAutoCompleteSelectField.php

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<?php

class HTMLAutoCompleteSelectField extends HTMLTextField {
    protected $autocomplete = [];

    function __construct( $params ) {
        $params += [
            'require-match' => false,
        ];

        parent::__construct( $params );

        if ( array_key_exists( 'autocomplete-messages', $this->mParams ) ) {
            foreach ( $this->mParams['autocomplete-messages'] as $key => $value ) {
                $key = $this->msg( $key )->plain();
                $this->autocomplete[$key] = strval( $value );
            }
        } elseif ( array_key_exists( 'autocomplete', $this->mParams ) ) {
            foreach ( $this->mParams['autocomplete'] as $key => $value ) {
                $this->autocomplete[$key] = strval( $value );
            }
        }
        if ( !is_array( $this->autocomplete ) || !$this->autocomplete ) {
            throw new MWException( 'HTMLAutoCompleteSelectField called without any autocompletions' );
        }

        $this->getOptions();
        if ( $this->mOptions && !in_array( 'other', $this->mOptions, true ) ) {
            if ( isset( $params['other-message'] ) ) {
                $msg = $this->getMessage( $params['other-message'] )->text();
            } elseif ( isset( $params['other'] ) ) {
                $msg = $params['other'];
            } else {
                $msg = wfMessage( 'htmlform-selectorother-other' )->text();
            }
            $this->mOptions[$msg] = 'other';
        }
    }

    function loadDataFromRequest( $request ) {
        if ( $request->getCheck( $this->mName ) ) {
            $val = $request->getText( $this->mName . '-select', 'other' );

            if ( $val === 'other' ) {
                $val = $request->getText( $this->mName );
                if ( isset( $this->autocomplete[$val] ) ) {
                    $val = $this->autocomplete[$val];
                }
            }

            return $val;
        } else {
            return $this->getDefault();
        }
    }

    function validate( $value, $alldata ) {
        $p = parent::validate( $value, $alldata );

        if ( $p !== true ) {
            return $p;
        }

        $validOptions = HTMLFormField::flattenOptions( $this->getOptions() );

        if ( in_array( strval( $value ), $validOptions, true ) ) {
            return true;
        } elseif ( in_array( strval( $value ), $this->autocomplete, true ) ) {
            return true;
        } elseif ( $this->mParams['require-match'] ) {
            return $this->msg( 'htmlform-select-badoption' )->parse();
        }

        return true;
    }

    // FIXME Ewww, this shouldn't be adding any attributes not requested in $list :(
    public function getAttributes( array $list ) {
        $attribs = [
            'type' => 'text',
            'data-autocomplete' => FormatJson::encode( array_keys( $this->autocomplete ) ),
        ] + parent::getAttributes( $list );

        if ( $this->getOptions() ) {
            $attribs['data-hide-if'] = FormatJson::encode(
                [ '!==', $this->mName . '-select', 'other' ]
            );
        }

        return $attribs;
    }

    function getInputHTML( $value ) {
        $oldClass = $this->mClass;
        $this->mClass = (array)$this->mClass;

        $valInSelect = false;
        $ret = '';

        if ( $this->getOptions() ) {
            if ( $value !== false ) {
                $value = strval( $value );
                $valInSelect = in_array(
                    $value, HTMLFormField::flattenOptions( $this->getOptions() ), true
                );
            }

            $selected = $valInSelect ? $value : 'other';
            $select = new XmlSelect( $this->mName . '-select', $this->mID . '-select', $selected );
            $select->addOptions( $this->getOptions() );
            $select->setAttribute( 'class', 'mw-htmlform-select-or-other' );

            if ( !empty( $this->mParams['disabled'] ) ) {
                $select->setAttribute( 'disabled', 'disabled' );
            }

            if ( isset( $this->mParams['tabindex'] ) ) {
                $select->setAttribute( 'tabindex', $this->mParams['tabindex'] );
            }

            $ret = $select->getHTML() . "<br />\n";

            $this->mClass[] = 'mw-htmlform-hide-if';
        }

        if ( $valInSelect ) {
            $value = '';
        } else {
            $key = array_search( strval( $value ), $this->autocomplete, true );
            if ( $key !== false ) {
                $value = $key;
            }
        }

        $this->mClass[] = 'mw-htmlform-autocomplete';
        $ret .= parent::getInputHTML( $valInSelect ? '' : $value );
        $this->mClass = $oldClass;

        return $ret;
    }

    function getInputOOUI( $value ) {
        // To be implemented, for now override the function from HTMLTextField
        return false;
    }
}