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<?php //$Id: backuplib.php,v 1.11 2006/02/08 23:46:21 danmarsden Exp $
//This php script contains all the stuff to backup/restore
//choice mods
//This is the "graphical" structure of the choice mod:
//
// choice
// (CL,pk->id)----------|
// | |
// | |
// | |
// choice_options |
// (UL,pk->id, fk->choiceid) |
// | |
// | |
// | |
// choice_answers |
// (UL,pk->id, fk->choiceid, fk->optionid)
//
// Meaning: pk->primary key field of the table
// fk->foreign key to link with parent
// nt->nested field (recursive data)
// CL->course level info
// UL->user level info
// files->table may have files)
//
//-----------------------------------------------------------
function choice_backup_mods($bf,$preferences) {
global $CFG;
$status = true;
//Iterate over choice table
$choices = get_records ("choice","course",$preferences->backup_course,"id");
if ($choices) {
foreach ($choices as $choice) {
if (backup_mod_selected($preferences,'choice',$choice->id)) {
$status = choice_backup_one_mod($bf,$preferences,$choice);
}
}
}
return $status;
}
function choice_backup_one_mod($bf,$preferences,$choice) {
global $CFG;
if (is_numeric($choice)) {
$choice = get_record('choice','id',$choice);
}
$status = true;
//Start mod
fwrite ($bf,start_tag("MOD",3,true));
//Print choice data
fwrite ($bf,full_tag("ID",4,false,$choice->id));
fwrite ($bf,full_tag("MODTYPE",4,false,"choice"));
fwrite ($bf,full_tag("NAME",4,false,$choice->name));
fwrite ($bf,full_tag("TEXT",4,false,$choice->text));
fwrite ($bf,full_tag("FORMAT",4,false,$choice->format));
fwrite ($bf,full_tag("PUBLISH",4,false,$choice->publish));
fwrite ($bf,full_tag("SHOWRESULTS",4,false,$choice->showresults));
fwrite ($bf,full_tag("DISPLAY",4,false,$choice->display));
fwrite ($bf,full_tag("ALLOWUPDATE",4,false,$choice->allowupdate));
fwrite ($bf,full_tag("SHOWUNANSWERED",4,false,$choice->showunanswered));
fwrite ($bf,full_tag("LIMITANSWERS",4,false,$choice->limitanswers));
fwrite ($bf,full_tag("TIMEOPEN",4,false,$choice->timeopen));
fwrite ($bf,full_tag("TIMECLOSE",4,false,$choice->timeclose));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$choice->timemodified));
//Now backup choice_options
$status = backup_choice_options($bf,$preferences,$choice->id);
//if we've selected to backup users info, then execute backup_choice_answers
if (backup_userdata_selected($preferences,'choice',$choice->id)) {
$status = backup_choice_answers($bf,$preferences,$choice->id);
}
//End mod
$status =fwrite ($bf,end_tag("MOD",3,true));
return $status;
}
//Backup choice_answers contents (executed from choice_backup_mods)
function backup_choice_answers ($bf,$preferences,$choice) {
global $CFG;
$status = true;
$choice_answers = get_records("choice_answers","choiceid",$choice,"id");
//If there is answers
if ($choice_answers) {
//Write start tag
$status =fwrite ($bf,start_tag("ANSWERS",4,true));
//Iterate over each answer
foreach ($choice_answers as $cho_ans) {
//Start answer
$status =fwrite ($bf,start_tag("ANSWER",5,true));
//Print answer contents
fwrite ($bf,full_tag("ID",6,false,$cho_ans->id));
fwrite ($bf,full_tag("USERID",6,false,$cho_ans->userid));
fwrite ($bf,full_tag("OPTIONID",6,false,$cho_ans->optionid));
fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$cho_ans->timemodified));
//End answer
$status =fwrite ($bf,end_tag("ANSWER",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ANSWERS",4,true));
}
return $status;
}
//backup choice_options contents (executed from choice_backup_mods)
function backup_choice_options ($bf,$preferences,$choice) {
global $CFG;
$status = true;
$choice_options = get_records("choice_options","choiceid",$choice,"id");
//If there is options
if ($choice_options) {
//Write start tag
$status =fwrite ($bf,start_tag("OPTIONS",4,true));
//Iterate over each answer
foreach ($choice_options as $cho_opt) {
//Start option
$status =fwrite ($bf,start_tag("OPTION",5,true));
//Print option contents
fwrite ($bf,full_tag("ID",6,false,$cho_opt->id));
fwrite ($bf,full_tag("TEXT",6,false,$cho_opt->text));
fwrite ($bf,full_tag("MAXANSWERS",6,false,$cho_opt->maxanswers));
fwrite ($bf,full_tag("TIMEMODIFIED",6,false,$cho_opt->timemodified));
//End answer
$status =fwrite ($bf,end_tag("OPTION",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("OPTIONS",4,true));
}
return $status;
}
////Return an array of info (name,value)
function choice_check_backup_mods($course,$user_data=false,$backup_unique_code,$instances=null) {
if (!empty($instances) && is_array($instances) && count($instances)) {
$info = array();
foreach ($instances as $id => $instance) {
$info += choice_check_backup_mods_instances($instance,$backup_unique_code);
}
return $info;
}
//First the course data
$info[0][0] = get_string("modulenameplural","choice");
if ($ids = choice_ids ($course)) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
//Now, if requested, the user_data
if ($user_data) {
$info[1][0] = get_string("responses","choice");
if ($ids = choice_answer_ids_by_course ($course)) {
$info[1][1] = count($ids);
} else {
$info[1][1] = 0;
}
}
return $info;
}
////Return an array of info (name,value)
function choice_check_backup_mods_instances($instance,$backup_unique_code) {
//First the course data
$info[$instance->id.'0'][0] = '<b>'.$instance->name.'</b>';
$info[$instance->id.'0'][1] = '';
//Now, if requested, the user_data
if (!empty($instance->userdata)) {
$info[$instance->id.'1'][0] = get_string("responses","choice");
if ($ids = choice_answer_ids_by_instance ($instance->id)) {
$info[$instance->id.'1'][1] = count($ids);
} else {
$info[$instance->id.'1'][1] = 0;
}
}
return $info;
}
//Return a content encoded to support interactivities linking. Every module
//should have its own. They are called automatically from the backup procedure.
function choice_encode_content_links ($content,$preferences) {
global $CFG;
$base = preg_quote($CFG->wwwroot,"/");
//Link to the list of choices
$buscar="/(".$base."\/mod\/choice\/index.php\?id\=)([0-9]+)/";
$result= preg_replace($buscar,'$@CHOICEINDEX*$2@$',$content);
//Link to choice view by moduleid
$buscar="/(".$base."\/mod\/choice\/view.php\?id\=)([0-9]+)/";
$result= preg_replace($buscar,'$@CHOICEVIEWBYID*$2@$',$result);
return $result;
}
// INTERNAL FUNCTIONS. BASED IN THE MOD STRUCTURE
//Returns an array of choices id
function choice_ids ($course) {
global $CFG;
return get_records_sql ("SELECT a.id, a.course
FROM {$CFG->prefix}choice a
WHERE a.course = '$course'");
}
//Returns an array of choice_answers id
function choice_answer_ids_by_course ($course) {
global $CFG;
return get_records_sql ("SELECT s.id , s.choiceid
FROM {$CFG->prefix}choice_answers s,
{$CFG->prefix}choice a
WHERE a.course = '$course' AND
s.choiceid = a.id");
}
//Returns an array of choice_answers id
function choice_answer_ids_by_instance ($instanceid) {
global $CFG;
return get_records_sql ("SELECT s.id , s.choiceid
FROM {$CFG->prefix}choice_answers s
WHERE s.choiceid = $instanceid");
}
?>
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