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davical/inc/classEditor.php

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<?php
/**
* Class for editing a record using a templated form.
*
* @package apms
* @subpackage classEditor
* @author Andrew McMillan <andrew@mcmillan.net.nz>
* @copyright Catalyst IT Ltd, Morphoss Ltd <http://www.morphoss.com/>
* @license http://gnu.org/copyleft/gpl.html GNU GPL v2
*/
require_once("DataUpdate.php");
require_once("DataEntry.php");
/**
* A class for the fields in the editor
* @package apms
*/
class EditorField
{
var $Field;
var $Sql;
var $Value;
var $Attributes;
var $LookupSql;
var $OptionList;
function EditorField( $field, $sql="", $lookup_sql="" ) {
global $session;
$this->Field = $field;
$this->Sql = $sql;
$this->LookupSql = $lookup_sql;
$this->Attributes = array();
$session->Log("DBG: New field '%s' SQL='%s', Lookup='%s'", $field, $sql, $lookup_sql );
}
function Set($value) {
$this->Value = $value;
}
function SetSql( $sql ) {
$this->Sql = $sql;
}
function SetLookup( $lookup_sql ) {
$this->LookupSql = $lookup_sql;
}
function SetOptionList( $options, $current = null, $parameters = null) {
if ( gettype($options) == 'array' ) {
$this->OptionList = '';
if ( is_array($parameters) ) {
if ( isset($parameters['maxwidth']) ) $maxwidth = max(4,intval($parameters['maxwidth']));
if ( isset($parameters['translate']) ) $translate = true;
}
foreach( $options AS $k => $v ) {
if (is_array($current)) {
$selected = ( ( in_array($k,$current,true) || in_array($v,$current,true)) ? ' selected="selected"' : '' );
}
else {
$selected = ( ( "$k" == "$current" || "$v" == "$current" ) ? ' selected="selected"' : '' );
}
if ( isset($translate) ) $v = translate( $v );
if ( isset($maxwidth) ) $v = substr( $v, 0, $maxwidth);
$this->OptionList .= "<option value=\"".htmlspecialchars($k)."\"$selected>".htmlspecialchars($v)."</option>";
}
}
else {
$this->OptionList = $options;
}
}
function GetTarget() {
if ( $this->Sql == "" ) return $this->Field;
return "$this->Sql AS $this->Field";
}
function AddAttribute( $k, $v ) {
$this->Attributes[$k] = $v;
}
function RenderAttributes() {
$attributes = "";
if ( count($this->Attributes) == 0 ) return $attributes;
foreach( $this->Attributes AS $k => $v ) {
$attributes .= " $k=\"" . str_replace('"', '\\"', $v) . '"';
}
return $attributes;
}
}
/**
* The class for the Editor form in full
* @package apms
*/
class Editor
{
var $Title;
var $Action;
var $Fields;
var $OrderedFields;
var $BaseTable;
var $Joins;
var $Where;
var $NewWhere;
var $Order;
var $Limit;
var $Query;
var $Template;
var $RecordAvailable;
var $Record;
var $SubmitName;
var $Id;
function Editor( $title = "", $fields = null ) {
global $c, $session, $form_id_increment;
$this->Title = $title;
$this->Order = "";
$this->Limit = "";
$this->Template = "";
$this->RecordAvailable = false;
$this->SubmitName = 'submit';
$form_id_increment = (isset($form_id_increment)? ++$form_id_increment : 1);
$this->Id = 'editor_'.$form_id_increment;
if ( isset($fields) ) {
if ( is_array($fields) ) {
foreach( $fields AS $k => $v ) {
$this->AddField($v);
}
}
else if ( is_string($fields) ) {
// We've been given a table name, so get all fields for it.
$this->BaseTable = $fields;
$field_list = get_fields($fields);
foreach( $field_list AS $k => $v ) {
$this->AddField($k);
}
}
}
dbg_error_log("classEditor", "DBG: New editor called $title");
}
function &AddField( $field, $sql="", $lookup_sql="" ) {
$this->Fields[$field] = new EditorField( $field, $sql, $lookup_sql );
$this->OrderedFields[] = $field;
return $this->Fields[$field];
}
function SetSql( $field, $sql ) {
$this->Fields[$field]->SetSql( $sql );
}
function SetLookup( $field, $lookup_sql ) {
$this->Fields[$field]->SetLookup( $lookup_sql );
}
function Value( $value_field_name ) {
if ( !isset($this->Record->{$value_field_name}) ) return null;
return $this->Record->{$value_field_name};
}
function Assign( $value_field_name, $new_value ) {
$this->Record->{$value_field_name} = $new_value;
}
function Id( $id = null ) {
if ( isset($id) ) $this->Id = preg_replace( '#[^a-z0-9_+-]#', '', $id);
return $this->Id;
}
function SetOptionList( $field, $options, $current = null, $parameters = null) {
$this->Fields[$field]->SetOptionList( $options, $current, $parameters );
}
function AddAttribute( $field, $k, $v ) {
$this->Fields[$field]->AddAttribute($k,$v);
}
function SetBaseTable( $base_table ) {
$this->BaseTable = $base_table;
}
function SetJoins( $join_list ) {
$this->Joins = $join_list;
}
/**
* Accessor for the Title for the browse, which could set the title also.
*
* @param string $new_title The new title for the browser
* @return string The current title for the browser
*/
function Title( $new_title = null ) {
if ( isset($new_title) ) $this->Title = $new_title;
return $this->Title;
}
function SetSubmitName( $new_submit ) {
$this->SubmitName = $new_submit;
}
function IsSubmit() {
return isset($_POST[$this->SubmitName]);
}
function IsUpdate() {
$is_update = $this->Available();
if ( isset( $_POST['_editor_action']) && isset( $_POST['_editor_action'][$this->Id]) ) {
$is_update = ( $_POST['_editor_action'][$this->Id] == 'update' );
dbg_error_log("ERROR", "Checking update: %s => %d", $_POST['_editor_action'][$this->Id], $is_update );
}
return $is_update;
}
function SetWhere( $where_clause ) {
$this->Where = $where_clause;
}
function WhereNewRecord( $where_clause ) {
$this->NewWhere = $where_clause;
}
function MoreWhere( $operator, $more_where ) {
if ( $this->Where == "" ) {
$this->Where = $more_where;
return;
}
$this->Where = "$this->Where $operator $more_where";
}
function AndWhere( $more_where ) {
$this->MoreWhere("AND",$more_where);
}
function OrWhere( $more_where ) {
$this->MoreWhere("OR",$more_where);
}
function SetTemplate( $template ) {
$this->Template = $template;
}
function Layout( $template ) {
if ( strstr( $template, '##form##' ) === false && stristr( $template, '<form' ) === false ) $template = '##form##' . $template;
if ( stristr( $template, '</form' ) === false ) $template .= '</form>';
$this->Template = $template;
}
function Available( ) {
return $this->RecordAvailable;
}
function SetRecord( $row ) {
$this->Record = $row;
$this->RecordAvailable = is_object($this->Record);
return $this->Record;
}
/**
* Set some particular values to the ones from the array.
*
* @param array $values An array of fieldname / value pairs
*/
function Initialise( $values ) {
$this->RecordAvailable = false;
foreach( $values AS $fname => $value ) {
$this->Record->{$fname} = $value;
}
}
function GetRecord( $where = "" ) {
global $session;
$target_fields = "";
foreach( $this->Fields AS $k => $column ) {
if ( $target_fields != "" ) $target_fields .= ", ";
$target_fields .= $column->GetTarget();
}
if ( $where == "" ) $where = $this->Where;
$sql = sprintf( "SELECT %s FROM %s %s WHERE %s %s %s",
$target_fields, $this->BaseTable, $this->Joins, $where, $this->Order, $this->Limit);
$this->Query = new PgQuery( $sql );
$session->Log("DBG: EditorGetQry: %s", $sql );
if ( $this->Query->Exec("Browse:$this->Title:DoQuery") ) {
$this->Record = $this->Query->Fetch();
$this->RecordAvailable = is_object($this->Record);
}
if ( !$this->RecordAvailable ) {
$this->Record = (object) array();
}
return $this->Record;
}
/**
* Replace parts into the form template.
* @param array $matches The matches found which preg_replace_callback is calling us for.
* @return string What we want to replace this match with.
*/
function ReplaceEditorPart($matches)
{
global $session;
// $matches[0] is the complete match
switch( $matches[0] ) {
case "##form##": /** @todo It might be nice to construct a form ID */
return sprintf('<form method="POST" enctype="multipart/form-data" class="editor" id="%s">', $this->Id);
case "##submit##":
$action = ( $this->RecordAvailable ? 'update' : 'insert' );
$submittype = ($this->RecordAvailable ? 'Apply Changes' : 'Create');
return sprintf('<input type="hidden" name="_editor_action[%s]" value="%s"><input type="submit" class="submit" name="%s" value="%s">',
$this->Id, $action, $this->SubmitName, $submittype );
}
// $matches[1] the match for the first subpattern
// enclosed in '(...)' and so on
$field_name = $matches[1];
$what_part = $matches[3];
$part3 = (isset($matches[5]) ? $matches[5] : null);
$value_field_name = $field_name;
if ( substr($field_name,0,4) == 'xxxx' ) {
// Sometimes we will prepend 'xxxx' to the field name so that the field
// name differs from the column name in the database. We also remove it
// when it's submitted.
$value_field_name = substr($field_name,4);
}
$attributes = "";
if ( isset($this->Fields[$field_name]) && is_object($this->Fields[$field_name]) ) {
$field = $this->Fields[$field_name];
$attributes = $field->RenderAttributes();
}
$field_value = (isset($this->Record->{$value_field_name}) ? $this->Record->{$value_field_name} : null);
switch( $what_part ) {
case "options":
$currval = $part3;
if ( ! isset($currval) && isset($field_value) )
$currval = $field_value;
if ( isset($field->OptionList) && $field->OptionList != "" ) {
$option_list = $field->OptionList;
}
else {
$session->Log("DBG: Current=%s, OptionQuery: %s", $currval, $field->LookupSql );
$opt_qry = new PgQuery( $field->LookupSql );
$option_list = $opt_qry->BuildOptionList($currval, "FieldOptions: $field_name" );
$field->OptionList = $option_list;
}
return $option_list;
case "select":
$currval = $part3;
if ( ! isset($currval) && isset($field_value) )
$currval = $field_value;
if ( isset($field->OptionList) && $field->OptionList != "" ) {
$option_list = $field->OptionList;
}
else {
$session->Log("DBG: Current=%s, OptionQuery: %s", $currval, $field->LookupSql );
$opt_qry = new PgQuery( $field->LookupSql );
$option_list = $opt_qry->BuildOptionList($currval, "FieldOptions: $field_name" );
$field->OptionList = $option_list;
}
return "<select class=\"entry\" name=\"$field_name\"$attributes>$option_list</select>";
case "checkbox":
switch ( $field_value ) {
case 'f':
case 'off':
case 'false':
case '':
case '0':
$checked = "";
break;
default:
$checked = " CHECKED";
}
return "<input type=\"hidden\" value=\"off\" name=\"$field_name\"><input class=\"entry\" type=\"checkbox\" value=\"on\" name=\"$field_name\"$checked$attributes>";
case "input":
$size = (isset($part3) ? $part3 : 6);
return "<input class=\"entry\" value=\"".htmlspecialchars($field_value)."\" name=\"$field_name\" size=\"$size\"$attributes>";
case "file":
$size = (isset($part3) ? $part3 : 30);
return "<input type=\"file\" class=\"entry\" value=\"".htmlspecialchars($field_value)."\" name=\"$field_name\" size=\"$size\"$attributes>";
case "money":
$size = (isset($part3) ? $part3 : 8);
return "<input class=\"money\" value=\"".htmlspecialchars(sprintf("%0.2lf",$field_value))."\" name=\"$field_name\" size=\"$size\"$attributes>";
case "date":
$size = (isset($part3) ? $part3 : 10);
return "<input class=\"date\" value=\"".htmlspecialchars($field_value)."\" name=\"$field_name\" size=\"$size\"$attributes>";
case "textarea":
list( $cols, $rows ) = split( 'x', $part3);
return "<textarea class=\"entry\" name=\"$field_name\" rows=\"$rows\" cols=\"$cols\"$attributes>".htmlspecialchars($field_value)."</textarea>";
case "hidden":
return sprintf( "<input type=\"hidden\" value=\"%s\" name=\"$field_name\">", htmlspecialchars($field_value) );
case "password":
return sprintf( "<input type=\"password\" value=\"%s\" name=\"$field_name\" size=\"10\">", htmlspecialchars($part3) );
case "encval":
case "enc":
return htmlspecialchars($field_value);
case "submit":
$action = ( $this->RecordAvailable ? 'update' : 'insert' );
return sprintf('<input type="hidden" name="_editor_action[%s]" value="%s"><input type="submit" class="submit" name="%s" value="%s">',
$this->Id, $action, $this->SubmitName, $value_field_name );
default:
return str_replace( "\n", "<br />", $field_value );
}
}
/**
* Render the templated component. The heavy lifting is done by the callback...
*/
function Render( $title_tag = null ) {
dbg_error_log("classEditor", "Rendering editor $this->Title" );
if ( $this->Template == "" ) $this->DefaultTemplate();
$html = sprintf('<div class="editor" id="%s">', $this->Id);
if ( isset($this->Title) && $this->Title != "" ) {
if ( !isset($title_tag) ) $title_tag = 'h1';
$html = "<$title_tag>$this->Title</$title_tag>\n";
}
// Stuff like "##fieldname.part## gets converted to the appropriate value
$replaced = preg_replace_callback("/##([^#.]+)(\.([^#.]+))?(\.([^#.]+))?##/", array(&$this, "ReplaceEditorPart"), $this->Template );
$html .= $replaced;
$html .= '</div>';
return $html;
}
/**
* Write the record
* @param boolean $is_update Tell the write whether it's an update or insert. Hopefully it
* should be able to figure it out though.
*/
function Write( $is_update = null ) {
global $c, $component;
dbg_error_log("classEditor", "DBG: Writing editor $this->Title");
if ( !isset($is_update) ) {
if ( isset( $_POST['_editor_action']) && isset( $_POST['_editor_action'][$this->Id]) ) {
$is_update = ( $_POST['_editor_action'][$this->Id] == 'update' );
}
else {
/** @todo Our old approach will not work for translation. We need to have a hidden field
* containing the submittype. Probably we should add placeholders like ##form##, ##script## etc.
* which the editor can use for internal purposes.
*/
// Then we dvine the action by looking at the submit button value...
$is_update = preg_match( '/(save|update|apply)/i', $_POST[$this->SubmitName] );
dbg_error_log("ERROR", $_SERVER['REQUEST_URI']. " is using a deprecated method for controlling insert/update" );
}
}
$this->Action = ( $is_update ? "update" : "create" );
$qry = new PgQuery( sql_from_post( $this->Action, $this->BaseTable, "WHERE ".$this->Where ) );
if ( !$qry->Exec("Editor::Write") ) {
$c->messages[] = "ERROR: $qry->errorstring";
return 0;
}
if ( $this->Action == "create" && isset($this->NewWhere) ) {
$this->GetRecord($this->NewWhere);
}
else {
$this->GetRecord($this->Where);
}
return $this->Record;
}
}
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