Confirming the Entered Data
The first thing is to check the data being entered. We have to add the next case in the continuations to check on the entered data:
resources/scripts/AddComposer.php
class AddComposer extends Continuations {
/** Logger instance for this class */
private $gLogger;
private $gAddComposerModel = array (
"name" => "",
"firstNames" => "",
"birth" => "",
"death" => "",
);
private $dataRequired = array (
"name" => "Must enter a composer's name",
);
...
// -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* -->
// -*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* -->
/**
*/
function add()
{
global $gModules;
$this->gLogger->debug( "Adding entry, continuation: " . $this->gContinuation );
$requestParameterModule = $gModules[ 'request-param' ];
$this->gViolations = array();
$finished = false;
while ( !$finished ) {
$errors = false;
switch ( $this->gContinuation ) {
case 0 :
$this->sendPage(
"addComposer-1.html", // The page to send to the client
$this->gAddComposerModel, // The current data model to send
++$this->gContinuation, // The continuation link for the next stage
$this->gViolations ); // Array of errors (keyed by data model keys)
$finished = true;
break;
case 1 :
// Error processing here
// First I have to check that there are contents in the required fields. I could leave
// out the "isset" but some PHP systems will have strict error checking
// and produce extraneous error messages on the page.
foreach ( $this->dataRequired as $key => $msg ) {
if ( !isset( $this->gAddComposerModel[ $key ] ) or
strlen( $this->gAddComposerModel[ $key ] ) == 0 ) {
$this->gViolations[ $key ] = $msg;
$errors = true;
}
}
// Now check for remaining errors. Adjust the order of the checks
// to suit local conditions.
if ( $errors === false ) {
if ( $this->gAddComposerModel[ 'birth' ] >= $this->gAddComposerModel[ 'death' ] and
$this->gAddComposerModel[ 'birth' ] != "" and
$this->gAddComposerModel[ 'death' ] != "" ) {
$this->gViolations[ 'birth' ] = "Birth is later than death";
$errors = true;
}
}
if ( $errors ) {
$this->gContinuation--;
$finished = false;
} else {
// No errors so send next page
$this->sendPage(
"addComposer-2.html",
$this->gAddComposerModel,
++$this->gContinuation,
$this->gViolations );
$finished = true;
}
break;
}
}
}
If an error occurs (such as a blank form) then the following will be output:
Confirm Add Composer Form
Assuming that there are no errors the flowscript redirects to the page, addComposer-2.html. The sitemap does not need to change but the XML file is:
/examples/sql/addComposer-2.xml
<page:content>
<t:heading level="1">SQL Add Composer</t:heading>
<pf:form id="addComposerForm" flow="addComposer"
continuation="{flow:continuation.id}"
session="{flow:__flowId}">
<pf:label>Press confirm to accept new composer:</pf:label>
<pf:output ref="name">
<pf:label>Composer name:</pf:label>
<pf:value>{flow:name}</pf:value>
</pf:output>
<pf:output ref="firstNames">
<pf:label>First names:</pf:label>
<pf:value>{flow:firstNames}</pf:value>
</pf:output>
<pf:output ref="birth">
<pf:label>Birth date:</pf:label>
<pf:value>{flow:birth}</pf:value>
</pf:output>
<pf:output ref="death">
<pf:label>Death date:</pf:label>
<pf:value>{flow:death}</pf:value>
</pf:output>
<pf:submit class="button" id="prev">
<pf:label>Back</pf:label>
<pf:hint>Go to previous page</pf:hint>
</pf:submit>
<pf:submit class="button" id="next">
<pf:label>Confirm</pf:label>
<pf:hint>Confirm new composer</pf:hint>
</pf:submit>
</pf:form>
<t:p>
<link:link type="uri" ref="/examples/sql/sql.html">Return to SQL index</link:link>
</t:p>
<t:p><link:link type="uri" ref="/examples/sql/logout.html">Logout</link:link> from admin pages.</t:p>
</page:content>
which provides a confirmation page. Entering the following data:
Gives the output:
The next section shows how to write this information into the database.
Copyright 2006 — 2010 Hugh Field-Richards. All Rights Reserved.