<?php
+/**
+ * Object handling generic submission, CSRF protection, layout and
+ * other logic for UI forms. in a reusable manner.
+ *
+ * In order to generate the form, the HTMLForm object takes an array
+ * structure detailing the form fields available. Each element of the
+ * array is a basic property-list, including the type of field, the
+ * label it is to be given in the form, callbacks for validation and
+ * 'filtering', and other pertinent information.
+ *
+ * Field types are implemented as subclasses of the generic HTMLFormField
+ * object, and typically implement at least getInputHTML, which generates
+ * the HTML for the input field to be placed in the table.
+ *
+ * The constructor input is an associative array of $fieldname => $info,
+ * where $info is an Associative Array with any of the following:
+ *
+ * 'class' -- the subclass of HTMLFormField that will be used
+ * to create the object. *NOT* the CSS class!
+ * 'type' -- roughly translates into the <select> type attribute.
+ * if 'class' is not specified, this is used as a map
+ * through HTMLForm::$typeMappings to get the class name.
+ * 'default' -- default value when the form is displayed
+ * 'id' -- HTML id attribute
+ * 'options' -- varies according to the specific object.
+ * 'label-message' -- message key for a message to use as the label.
+ * can be an array of msg key and then parameters to
+ * the message.
+ * 'label' -- alternatively, a raw text message. Overridden by
+ * label-message
+ * 'help-message' -- message key for a message to use as a help text.
+ * can be an array of msg key and then parameters to
+ * the message.
+ * 'required' -- passed through to the object, indicating that it
+ * is a required field.
+ * 'size' -- the length of text fields
+ * 'filter-callback -- a function name to give you the chance to
+ * massage the inputted value before it's processed.
+ * @see HTMLForm::filter()
+ * 'validation-callback' -- a function name to give you the chance
+ * to impose extra validation on the field input.
+ * @see HTMLForm::validate()
+ *
+ * TODO: Document 'section' / 'subsection' stuff
+ */
class HTMLForm {
static $jsAdded = false;
- /* The descriptor is an array of arrays.
- i.e. array(
- 'fieldname' => array( 'section' => 'section/subsection',
- properties... ),
- ...
- )
- */
-
+ # A mapping of 'type' inputs onto standard HTMLFormField subclasses
static $typeMappings = array(
'text' => 'HTMLTextField',
'select' => 'HTMLSelectField',
'email' => 'HTMLTextField',
'password' => 'HTMLTextField',
);
+
+ protected $mMessagePrefix;
+ protected $mFlatFields;
+ protected $mFieldTree;
+ protected $mShowReset;
+ public $mFieldData;
+ protected $mSubmitCallback;
+ protected $mValidationErrorMessage;
+ protected $mIntro;
+ protected $mSubmitID;
+ protected $mSubmitText;
+ protected $mTitle;
- function __construct( $descriptor, $messagePrefix ) {
+ /**
+ * Build a new HTMLForm from an array of field attributes
+ * @param $descriptor Array of Field constructs, as described above
+ * @param $messagePrefix String a prefix to go in front of default messages
+ */
+ public function __construct( $descriptor, $messagePrefix='' ) {
$this->mMessagePrefix = $messagePrefix;
// Expand out into a tree.
$info['name'] = $fieldname;
- $field = $this->loadInputFromParameters( $info );
+ $field = self::loadInputFromParameters( $info );
$field->mParent = $this;
$setSection =& $loadedDescriptor;
$this->mShowReset = true;
}
+ /**
+ * Add the HTMLForm-specific JavaScript, if it hasn't been
+ * done already.
+ */
static function addJS() {
if( self::$jsAdded ) return;
$wgOut->addScriptClass( 'htmlform' );
}
+ /**
+ * Initialise a new Object for the field
+ * @param $descriptor input Descriptor, as described above
+ * @return HTMLFormField subclass
+ */
static function loadInputFromParameters( $descriptor ) {
if ( isset( $descriptor['class'] ) ) {
$class = $descriptor['class'];
return $obj;
}
+ /**
+ * The here's-one-I-made-earlier option: do the submission if
+ * posted, or display the form with or without funky valiation
+ * errors
+ * @return Bool whether submission was successful.
+ */
function show() {
$html = '';
self::addJS();
- // Load data from the request.
+ # Load data from the request.
$this->loadData();
- // Try a submission
+ # Try a submission
global $wgUser, $wgRequest;
$editToken = $wgRequest->getVal( 'wpEditToken' );
if( $result === true )
return $result;
- // Display form.
+ # Display form.
$this->displayForm( $result );
+ return false;
}
- /** Return values:
- * TRUE == Successful submission
- * FALSE == No submission attempted
- * Anything else == Error to display.
- */
+ /**
+ * Validate all the fields, and call the submision callback
+ * function if everything is kosher.
+ * @return Mixed Bool true == Successful submission, Bool false
+ * == No submission attempted, anything else == Error to
+ * display.
+ */
function trySubmit() {
- // Check for validation
+ # Check for validation
foreach( $this->mFlatFields as $fieldname => $field ) {
- if ( !empty( $field->mParams['nodata'] ) ) continue;
- if ( $field->validate( $this->mFieldData[$fieldname],
- $this->mFieldData ) !== true ) {
- return isset( $this->mValidationErrorMessage ) ?
- $this->mValidationErrorMessage : array( 'htmlform-invalid-input' );
+ if ( !empty( $field->mParams['nodata'] ) )
+ continue;
+ if ( $field->validate(
+ $this->mFieldData[$fieldname],
+ $this->mFieldData )
+ !== true )
+ {
+ return isset( $this->mValidationErrorMessage )
+ ? $this->mValidationErrorMessage
+ : array( 'htmlform-invalid-input' );
}
}
return $res;
}
+ /**
+ * Set a callback to a function to do something with the form
+ * once it's been successfully validated.
+ * @param $cb String function name. The function will be passed
+ * the output from HTMLForm::filterDataForSubmit, and must
+ * return Bool true on success, Bool false if no submission
+ * was attempted, or String HTML output to display on error.
+ */
function setSubmitCallback( $cb ) {
$this->mSubmitCallback = $cb;
}
+ /**
+ * Set a message to display on a validation error.
+ * @param $msg Mixed String or Array of valid inputs to wfMsgExt()
+ * (so each entry can be either a String or Array)
+ */
function setValidationErrorMessage( $msg ) {
$this->mValidationErrorMessage = $msg;
}
+ /**
+ * Set the introductory message
+ * @param $msg String complete text of message to display
+ */
function setIntro( $msg ) {
$this->mIntro = $msg;
}
+ /**
+ * Display the form (sending to wgOut), with an appropriate error
+ * message or stack of messages, and any validation errors, etc.
+ * @param $submitResult Mixed output from HTMLForm::trySubmit()
+ */
function displayForm( $submitResult ) {
global $wgOut;
$wgOut->addHTML( $html );
}
+ /**
+ * Wrap the form innards in an actual <form> element
+ * @param $html String HTML contents to wrap.
+ * @return String wrapped HTML.
+ */
function wrapForm( $html ) {
return Html::rawElement(
'form',
);
}
+ /**
+ * Get the hidden fields that should go inside the form.
+ * @return String HTML.
+ */
function getHiddenFields() {
global $wgUser;
$html = '';
return $html;
}
+ /**
+ * Get the submit and (potentially) reset buttons.
+ * @return String HTML.
+ */
function getButtons() {
$html = '';
return $html;
}
+ /**
+ * Get the whole body of the form.
+ */
function getBody() {
return $this->displaySection( $this->mFieldTree );
}
+ /**
+ * Format and display an error message stack.
+ * @param $errors Mixed String or Array of message keys
+ */
function displayErrors( $errors ) {
if ( is_array( $errors ) ) {
$errorstr = $this->formatErrors( $errors );
$wgOut->addHTML( $errorstr );
}
+ /**
+ * Format a stack of error messages into a single HTML string
+ * @param $errors Array of message keys/values
+ * @return String HTML, a <ul> list of errors
+ */
static function formatErrors( $errors ) {
$errorstr = '';
foreach ( $errors as $error ) {
return $errorstr;
}
+ /**
+ * Set the text for the submit button
+ * @param $t String plaintext.
+ */
function setSubmitText( $t ) {
$this->mSubmitText = $t;
}
+ /**
+ * Get the text for the submit button, either customised or a default.
+ * @return unknown_type
+ */
function getSubmitText() {
- return isset( $this->mSubmitText ) ? $this->mSubmitText : wfMsg( 'htmlform-submit' );
+ return $this->mSubmitText
+ ? $this->mSubmitText
+ : wfMsg( 'htmlform-submit' );
}
+ /**
+ * Set the id for the submit button.
+ * @param $t String. FIXME: Integrity is *not* validated
+ */
function setSubmitID( $t ) {
$this->mSubmitID = $t;
}
+ /**
+ * Set the prefix for various default messages
+ * TODO: currently only used for the <fieldset> legend on forms
+ * with multiple sections; should be used elsewhre?
+ * @param $p String
+ */
function setMessagePrefix( $p ) {
$this->mMessagePrefix = $p;
}
+ /**
+ * Set the title for form submission
+ * @param $t Title of page the form is on/should be posted to
+ */
function setTitle( $t ) {
$this->mTitle = $t;
}
+ /**
+ * Get the title
+ * @return Title
+ */
function getTitle() {
return $this->mTitle;
}
+ /**
+ * TODO: Document
+ * @param $fields
+ */
function displaySection( $fields ) {
$tableHtml = '';
$subsectionHtml = '';
foreach( $fields as $key => $value ) {
if ( is_object( $value ) ) {
$v = empty( $value->mParams['nodata'] )
- ? $this->mFieldData[$key]
- : $value->getDefault();
+ ? $this->mFieldData[$key]
+ : $value->getDefault();
$tableHtml .= $value->getTableRow( $v );
if( $value->getLabel() != ' ' )
return $subsectionHtml . "\n" . $tableHtml;
}
+ /**
+ * Construct the form fields from the Descriptor array
+ */
function loadData() {
global $wgRequest;
}
}
- // Filter data.
- foreach( $fieldData as $name => &$value ) {
- $field = $this->mFlatFields[$name];
- $value = $field->filter( $value, $this->mFlatFields );
- }
-
- $this->mFieldData = $fieldData;
- }
-
- function importData( $fieldData ) {
- // Filter data.
+ # Filter data.
foreach( $fieldData as $name => &$value ) {
$field = $this->mFlatFields[$name];
$value = $field->filter( $value, $this->mFlatFields );
}
- foreach( $this->mFlatFields as $fieldname => $field ) {
- if ( !isset( $fieldData[$fieldname] ) )
- $fieldData[$fieldname] = $field->getDefault();
- }
-
$this->mFieldData = $fieldData;
}
+ /**
+ * Stop a reset button being shown for this form
+ * @param $suppressReset Bool set to false to re-enable the
+ * button again
+ */
function suppressReset( $suppressReset = true ) {
$this->mShowReset = !$suppressReset;
}
+ /**
+ * Overload this if you want to apply special filtration routines
+ * to the form as a whole, after it's submitted but before it's
+ * processed.
+ * @param $data
+ * @return unknown_type
+ */
function filterDataForSubmit( $data ) {
return $data;
}
}
+/**
+ * The parent class to generate form fields. Any field type should
+ * be a subclass of this.
+ */
abstract class HTMLFormField {
+
+ protected $mValidationCallback;
+ protected $mFilterCallback;
+ protected $mName;
+ public $mParams;
+ protected $mLabel; # String label. Set on construction
+ protected $mID;
+ protected $mDefault;
+ public $mParent;
+
+ /**
+ * This function must be implemented to return the HTML to generate
+ * the input object itself. It should not implement the surrounding
+ * table cells/rows, or labels/help messages.
+ * @param $value String the value to set the input to; eg a default
+ * text for a text input.
+ * @return String valid HTML.
+ */
abstract function getInputHTML( $value );
+ /**
+ * Override this function to add specific validation checks on the
+ * field input. Don't forget to call parent::validate() to ensure
+ * that the user-defined callback mValidationCallback is still run
+ * @param $value String the value the field was submitted with
+ * @param $alldata $all the data collected from the form
+ * @return Bool is the input valid
+ */
function validate( $value, $alldata ) {
if ( isset( $this->mValidationCallback ) ) {
return call_user_func( $this->mValidationCallback, $value, $alldata );
return true;
}
+ /**
+ * Get the value that this input has been set to from a posted form,
+ * or the input's default value if it has not been set.
+ * @param $request WebRequest
+ * @return String the value
+ */
function loadDataFromRequest( $request ) {
if( $request->getCheck( $this->mName ) ) {
return $request->getText( $this->mName );
}
}
+ /**
+ * Initialise the object
+ * @param $params Associative Array. See HTMLForm doc for syntax.
+ */
function __construct( $params ) {
$this->mParams = $params;
+ # Generate the label from a message, if possible
if( isset( $params['label-message'] ) ) {
$msgInfo = $params['label-message'];
}
}
+ /**
+ * Get the complete table row for the input, including help text,
+ * labels, and whatever.
+ * @param $value String the value to set the input to.
+ * @return String complete HTML table row.
+ */
function getTableRow( $value ) {
- // Check for invalid data.
+ # Check for invalid data.
global $wgRequest;
$errors = $this->validate( $value, $this->mParent->mFieldData );
}
}
- static function flattenOptions( $options ) {
+ /**
+ * flatten an array of options to a single array, for instance,
+ * a set of <options> inside <optgroups>.
+ * @param $options Associative Array with values either Strings
+ * or Arrays
+ * @return Array flattened input
+ */
+ public static function flattenOptions( $options ) {
$flatOpts = array();
foreach( $options as $key => $value ) {
}
class HTMLTextField extends HTMLFormField {
- # Override in derived classes to use other Xml::... functions
- protected $mFunction = 'input';
function getSize() {
- return isset( $this->mParams['size'] ) ? $this->mParams['size'] : 45;
+ return isset( $this->mParams['size'] )
+ ? $this->mParams['size']
+ : 45;
}
function getInputHTML( $value ) {
$attribs[$param] = '';
}
}
+
+ # Implement tiny differences between some field variants
+ # here, rather than creating a new class for each one which
+ # is essentially just a clone of this one.
if ( isset( $this->mParams['type'] ) ) {
switch ( $this->mParams['type'] ) {
- case 'email':
- $attribs['type'] = 'email';
- break;
- case 'int':
- $attribs['type'] = 'number';
- break;
- case 'float':
- $attribs['type'] = 'number';
- $attribs['step'] = 'any';
- break;
- case 'password':
- $attribs['type'] = 'password';
- break;
+ case 'email':
+ $attribs['type'] = 'email';
+ break;
+ case 'int':
+ $attribs['type'] = 'number';
+ break;
+ case 'float':
+ $attribs['type'] = 'number';
+ $attribs['step'] = 'any';
+ break;
+ case 'password':
+ $attribs['type'] = 'password';
+ break;
}
}
}
}
}
+/**
+ * A field that will contain a numeric value
+ */
class HTMLFloatField extends HTMLTextField {
+
function getSize() {
- return isset( $this->mParams['size'] ) ? $this->mParams['size'] : 20;
+ return isset( $this->mParams['size'] )
+ ? $this->mParams['size']
+ : 20;
}
function validate( $value, $alldata ) {
$in_range = true;
- # The "int" part of these message names is rather confusing. They make
- # equal sense for all numbers.
+ # The "int" part of these message names is rather confusing.
+ # They make equal sense for all numbers.
if ( isset( $this->mParams['min'] ) ) {
$min = $this->mParams['min'];
if ( $min > $value )
}
}
+/**
+ * A field that must contain a number
+ */
class HTMLIntField extends HTMLFloatField {
function validate( $value, $alldata ) {
$p = parent::validate( $value, $alldata );
}
}
+/**
+ * A checkbox field
+ */
class HTMLCheckField extends HTMLFormField {
function getInputHTML( $value ) {
if ( !empty( $this->mParams['invert'] ) )
Html::rawElement( 'label', array( 'for' => $this->mID ), $this->mLabel );
}
+ /**
+ * For a checkbox, the label goes on the right hand side, and is
+ * added in getInputHTML(), rather than HTMLFormField::getRow()
+ */
function getLabel() {
- return ' '; // In the right-hand column.
+ return ' ';
}
function loadDataFromRequest( $request ) {
}
}
+/**
+ * A select dropdown field. Basically a wrapper for Xmlselect class
+ */
class HTMLSelectField extends HTMLFormField {
function validate( $value, $alldata ) {
function getInputHTML( $value ) {
$select = new XmlSelect( $this->mName, $this->mID, strval( $value ) );
- // If one of the options' 'name' is int(0), it is automatically selected.
- // because PHP sucks and things int(0) == 'some string'.
- // Working around this by forcing all of them to strings.
+ # If one of the options' 'name' is int(0), it is automatically selected.
+ # because PHP sucks and things int(0) == 'some string'.
+ # Working around this by forcing all of them to strings.
$options = array_map( 'strval', $this->mParams['options'] );
if( !empty( $this->mParams['disabled'] ) ) {
}
}
+/**
+ * Select dropdown field, with an additional "other" textbox.
+ */
class HTMLSelectOrOtherField extends HTMLTextField {
static $jsAdded = false;
}
}
+/**
+ * Multi-select field
+ */
class HTMLMultiSelectField extends HTMLFormField {
+
function validate( $value, $alldata ) {
$p = parent::validate( $value, $alldata );
if( $p !== true ) return $p;
if( !is_array( $value ) ) return false;
- // If all options are valid, array_intersect of the valid options and the provided
- // options will return the provided options.
+ # If all options are valid, array_intersect of the valid options
+ # and the provided options will return the provided options.
$validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
$validValues = array_intersect( $value, $validOptions );
}
function loadDataFromRequest( $request ) {
- // won't work with getCheck
+ # won't work with getCheck
if( $request->getCheck( 'wpEditToken' ) ) {
$arr = $request->getArray( $this->mName );
}
}
+/**
+ * Radio checkbox fields.
+ */
class HTMLRadioField extends HTMLFormField {
function validate( $value, $alldata ) {
$p = parent::validate( $value, $alldata );
return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
}
+ /**
+ * This returns a block of all the radio options, in one cell.
+ * @see includes/HTMLFormField#getInputHTML()
+ */
function getInputHTML( $value ) {
$html = $this->formatOptions( $this->mParams['options'], $value );
$attribs['disabled'] = 'disabled';
}
+ # TODO: should this produce an unordered list perhaps?
foreach( $options as $label => $info ) {
if( is_array( $info ) ) {
$html .= Html::rawElement( 'h1', array(), $label ) . "\n";
}
}
+/**
+ * An information field (text blob), not a proper input.
+ */
class HTMLInfoField extends HTMLFormField {
function __construct( $info ) {
$info['nodata'] = true;
dépôts / lhc / web / wiklou.git / commitdiff