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backuplib.php
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backuplib.php
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<?php //$Id$
//This php script contains all the stuff to backup/restore
//survey mods
//This is the "graphical" structure of the survey mod:
// --------------------
// survey | survey_questions |
// (CL,pk->id) |(CL,pk->id,?????) |
// | --------------------
// |
// -----------------------------------
// | |
// survey_analysis survey_answers
// (UL,pk->id, fk->survey) (UL,pk->id, fk->survey)
//
// 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 survey_backup_mods($bf,$preferences) {
global $CFG;
$status = true;
//Iterate over survey table
$surveys = get_records ("survey","course",$preferences->backup_course,"id");
if ($surveys) {
foreach ($surveys as $survey) {
if (backup_mod_selected($preferences,'survey',$survey->id)) {
$status = survey_backup_one_mod($bf,$preferences,$survey);
}
}
}
return $status;
}
function survey_backup_one_mod($bf,$preferences,$survey) {
$status = true;
if (is_numeric($survey)) {
$survey = get_record('survey','id',$survey);
}
//Start mod
fwrite ($bf,start_tag("MOD",3,true));
//Print choice data
fwrite ($bf,full_tag("ID",4,false,$survey->id));
fwrite ($bf,full_tag("MODTYPE",4,false,"survey"));
fwrite ($bf,full_tag("TEMPLATE",4,false,$survey->template));
fwrite ($bf,full_tag("DAYS",4,false,$survey->days));
fwrite ($bf,full_tag("TIMECREATED",4,false,$survey->timecreated));
fwrite ($bf,full_tag("TIMEMODIFIED",4,false,$survey->timemodified));
fwrite ($bf,full_tag("NAME",4,false,$survey->name));
fwrite ($bf,full_tag("INTRO",4,false,$survey->intro));
fwrite ($bf,full_tag("QUESTIONS",4,false,$survey->questions));
//if we've selected to backup users info, then execute backup_survey_answers and
//backup_survey_analysis
if (backup_userdata_selected($preferences,'survey',$survey->id)) {
$status = backup_survey_answers($bf,$preferences,$survey->id);
$status = backup_survey_analysis($bf,$preferences,$survey->id);
}
//End mod
$status =fwrite ($bf,end_tag("MOD",3,true));
return $status;
}
//Backup survey_answers contents (executed from survey_backup_mods)
function backup_survey_answers ($bf,$preferences,$survey) {
global $CFG;
$status = true;
$survey_answers = get_records("survey_answers","survey",$survey,"id");
//If there is answers
if ($survey_answers) {
//Write start tag
$status =fwrite ($bf,start_tag("ANSWERS",4,true));
//Iterate over each answer
foreach ($survey_answers as $sur_ans) {
//Start answer
$status =fwrite ($bf,start_tag("ANSWER",5,true));
//Print survey_answers contents
fwrite ($bf,full_tag("ID",6,false,$sur_ans->id));
fwrite ($bf,full_tag("USERID",6,false,$sur_ans->userid));
fwrite ($bf,full_tag("QUESTION",6,false,$sur_ans->question));
fwrite ($bf,full_tag("TIME",6,false,$sur_ans->time));
fwrite ($bf,full_tag("ANSWER1",6,false,$sur_ans->answer1));
fwrite ($bf,full_tag("ANSWER2",6,false,$sur_ans->answer2));
//End answer
$status =fwrite ($bf,end_tag("ANSWER",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ANSWERS",4,true));
}
return $status;
}
//Backup survey_analysis contents (executed from survey_backup_mods)
function backup_survey_analysis ($bf,$preferences,$survey) {
global $CFG;
$status = true;
$survey_analysis = get_records("survey_analysis","survey",$survey,"id");
//If there is analysis
if ($survey_analysis) {
//Write start tag
$status =fwrite ($bf,start_tag("ANALYSIS",4,true));
//Iterate over each analysis
foreach ($survey_analysis as $sur_ana) {
//Start answer
$status =fwrite ($bf,start_tag("ANALYS",5,true));
//Print survey_analysis contents
fwrite ($bf,full_tag("ID",6,false,$sur_ana->id));
fwrite ($bf,full_tag("USERID",6,false,$sur_ana->userid));
fwrite ($bf,full_tag("NOTES",6,false,$sur_ana->notes));
//End answer
$status =fwrite ($bf,end_tag("ANALYS",5,true));
}
//Write end tag
$status =fwrite ($bf,end_tag("ANALYSIS",4,true));
}
return $status;
}
function survey_check_backup_mods_instances($instance,$backup_unique_code) {
$info[$instance->id.'0'][0] = $instance->name;
$info[$instance->id.'0'][1] = '';
if (!empty($instance->userdata)) {
//Subscriptions
$info[$instance->id.'1'][0] = get_string("answers","survey");
if ($ids = survey_answer_ids_by_instance ($instance->id)) {
$info[$instance->id.'1'][1] = count($ids);
} else {
$info[$instance->id.'1'][1] = 0;
}
}
return $info;
}
////Return an array of info (name,value)
function survey_check_backup_mods($course,$user_data=false,$backup_unique_code,$instances=null) {
if (!empty($instances) && is_array($instances) && count($instances)) {
$info = array();
foreach ($instances as $id => $instance) {
$info += survey_check_backup_mods_instances($instance,$backup_unique_code);
}
return $info;
}
//First the course data
$info[0][0] = get_string("modulenameplural","survey");
if ($ids = survey_ids ($course)) {
$info[0][1] = count($ids);
} else {
$info[0][1] = 0;
}
//Now, if requested, the user_data
if ($user_data) {
//Subscriptions
$info[1][0] = get_string("answers","survey");
if ($ids = survey_answer_ids_by_course ($course)) {
$info[1][1] = count($ids);
} else {
$info[1][1] = 0;
}
}
return $info;
}
//Return a content encoded to support interactivities linking. Every module
//should have its own. They are called automatically from the backup procedure.
function servey_encode_content_links ($content,$preferences) {
global $CFG;
$base = preg_quote($CFG->wwwroot,"/");
//Link to the list of serveys
$buscar="/(".$base."\/mod\/servey\/index.php\?id\=)([0-9]+)/";
$result= preg_replace($buscar,'$@SURVEYINDEX*$2@$',$content);
//Link to servey view by moduleid
$buscar="/(".$base."\/mod\/servey\/view.php\?id\=)([0-9]+)/";
$result= preg_replace($buscar,'$@SURVEYVIEWBYID*$2@$',$result);
return $result;
}
// INTERNAL FUNCTIONS. BASED IN THE MOD STRUCTURE
//Returns an array of surveys id
function survey_ids ($course) {
global $CFG;
return get_records_sql ("SELECT a.id, a.course
FROM {$CFG->prefix}survey a
WHERE a.course = '$course'");
}
//Returns an array of survey answer id
function survey_answer_ids_by_course ($course) {
global $CFG;
return get_records_sql ("SELECT s.id , s.survey
FROM {$CFG->prefix}survey_answers s,
{$CFG->prefix}survey a
WHERE a.course = '$course' AND
s.survey = a.id");
}
function survey_answer_ids_by_instance ($instanceid) {
global $CFG;
return get_records_sql ("SELECT s.id , s.survey
FROM {$CFG->prefix}survey_answers s
WHERE s.survey = $instanceid");
}
?>