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locallib.php
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locallib.php
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<?php
/* @var $DB mysqli_native_moodle_database */
/* @var $OUTPUT core_renderer */
/* @var $PAGE moodle_page */
/**
* internal library of functions and constants for module flashcard
* @package mod-flashcard
* @category mod
* @author Gustav Delius
* @contributors Valery Fremaux
* @version Moodle 2.0
*/
/**
* Includes and requires
*/
/**
*
*/
define('FLASHCARD_MEDIA_TEXT', 0);
define('FLASHCARD_MEDIA_IMAGE', 1);
define('FLASHCARD_MEDIA_SOUND', 2);
define('FLASHCARD_MEDIA_IMAGE_AND_SOUND', 3);
define('FLASHCARD_CARDS_PER_PAGE', 10);
/**
* computes the last accessed date for a deck as the oldest card being in the deck
* @param reference $flashcard the flashcard object
* @param int $deck the deck number
* @param int $userid the user the deck belongs to
* @uses $USER for setting default user
* @uses $CFG, $DB
*/
function flashcard_get_lastaccessed(&$flashcard, $deck, $userid = 0) {
global $USER, $CFG, $DB;
if ($userid == 0) $userid = $USER->id;
$sql = "
SELECT
MIN(lastaccessed) as lastaccessed
FROM
{flashcard_card}
WHERE
flashcardid = ? AND
userid = ? AND
deck = ?
";
$rec = $DB->get_record_sql($sql, array($flashcard->id, $userid, $deck));
return $rec->lastaccessed;
}
/**
* prints a deck depending on deck status
* @param reference $cm the coursemodule
* @param int $deck the deck number
* @uses $CFG
*/
function flashcard_print_deck(&$cm, $deck) {
global $CFG;
if ($deck == 0) {
echo "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/emptydeck.png\"/>";
}
if ($deck > 0) {
echo "<a href=\"view.php?view=play&id={$cm->id}&deck={$deck}&what=initialize\" title=\"" . get_string('playwithme',
'flashcard') . "\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/enableddeck.png\"/></a>";
}
if ($deck < 0) {
$deck = -$deck;
echo "<a href=\"view.php?view=play&id={$cm->id}&deck={$deck}&what=initialize\" title=\"" . get_string('reinforce',
'flashcard') . "\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/disableddeck.png\"/></a>";
}
}
/**
* prints the deck status for use in teacher's overview
* @param reference $flashcard the flashcard object
* @param int $userid the user for which printing status
* @param object $status a status object to be filled by the function
* @param boolean $return if true, returns the produced HTML, elsewhere prints it.
* @uses $CFG
*/
function flashcard_print_deck_status(&$flashcard, $userid, &$status, $return) {
global $CFG, $OUTPUT;
$str = '';
$str = "<table width=\"100%\"><tr valign=\"bottom\"><td width=\"30%\" align=\"center\">";
// print for deck 1
if ($status->decks[0]->count) {
$image = ($status->decks[0]->reactivate) ? 'topenabled' : 'topdisabled';
$height = $status->decks[0]->count * 3;
$str .= "<table cellspacing=\"2\"><tr><td><div style=\"padding-bottom: {$height}px\" class=\"graphdeck\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/{$image}.png\" title=\"" . get_string('cardsindeck',
'flashcard', $status->decks[0]->count) . "\"/></div></td><td>";
$dayslateness = floor((time() - $status->decks[0]->lastaccess) / DAYSECS);
// echo "late 1 : $dayslateness";
$timetoreview = round(max(0,
($status->decks[0]->lastaccess + ($flashcard->deck1_delay * HOURSECS) - time()) / DAYSECS));
$strtimetoreview = get_string('timetoreview', 'flashcard', $timetoreview);
for ($i = 0; $i < min($dayslateness, floor($flashcard->deck1_delay / 24)); $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/clock.png\" valign=\"bottom\" title=\"$strtimetoreview\" />";
}
if ($dayslateness < $flashcard->deck1_delay / 24) {
for (; $i < $flashcard->deck1_delay / 24; $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/shadowclock.png\" valign=\"bottom\" title=\"$strtimetoreview\" />";
}
} elseif ($dayslateness > $flashcard->deck1_delay / 24) {
// Deck 1 has no release limit as cards can stay here as long as not viewed.
for ($i = 0; $i < min($dayslateness - floor($flashcard->deck1_delay / 24), 4); $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/overtime.png\" valign=\"bottom\" />";
}
}
$str .= '</td></tr></table>';
} else {
$str .= "<div height=\"12px\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topempty.png\" /></div>";
}
$str .= "</td><td>" . $OUTPUT->pix_icon('a/r_breadcrumb', 'right breadcrumb icon') . "</td><td width=\"30%\" align=\"center\">";
// print for deck 2
if ($status->decks[1]->count) {
$image = ($status->decks[1]->reactivate) ? 'topenabled' : 'topdisabled';
$height = $status->decks[1]->count * 3;
$str .= "<table cellspacing=\"2\"><tr><td><div style=\"padding-bottom: {$height}px\" class=\"graphdeck\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/{$image}.png\" title=\"" . get_string('cardsindeck',
'flashcard', $status->decks[1]->count) . "\"/></div></td><td>";
$dayslateness = floor((time() - $status->decks[1]->lastaccess) / DAYSECS);
// echo "late 2 : $dayslateness ";
$timetoreview = round(max(0,
($status->decks[1]->lastaccess + ($flashcard->deck2_delay * HOURSECS) - time()) / DAYSECS));
$strtimetoreview = get_string('timetoreview', 'flashcard', $timetoreview);
for ($i = 0; $i < min($dayslateness, floor($flashcard->deck2_delay / 24)); $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/clock.png\" valign=\"bottom\" title=\"$strtimetoreview\" />";
}
if ($dayslateness < $flashcard->deck2_delay / 24) {
for (; $i < $flashcard->deck2_delay / 24; $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/shadowclock.png\" valign=\"bottom\" title=\"$strtimetoreview\" />";
}
} elseif ($dayslateness > $flashcard->deck2_delay / 24) {
for ($i = 0; $i < min($dayslateness - floor($flashcard->deck2_delay / 24), $flashcard->deck2_release / 24);
$i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/overtime.png\" valign=\"bottom\" />";
}
}
$str .= '</td></tr></table>';
} else {
$str .= "<div height=\"12px\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topempty.png\" /></div>";
}
if ($flashcard->decks >= 3) {
$str .= "</td><td>" . $OUTPUT->pix_icon('a/r_breadcrumb', 'right breadcrumb icon') . "</td><td width=\"30%\" align=\"center\">";
// print for deck 3
if ($status->decks[2]->count) {
$image = ($status->decks[2]->reactivate) ? 'topenabled' : 'topdisabled';
$height = $status->decks[2]->count * 3;
$str .= "<table cellspacing=\"2\"><tr><td><div style=\"padding-bottom: {$height}px\" class=\"graphdeck\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/{$image}.png\" title=\"" . get_string('cardsindeck',
'flashcard', $status->decks[2]->count) . "\"/></div></td><td>";
$dayslateness = floor((time() - $status->decks[2]->lastaccess) / DAYSECS);
// echo "late 3 : $dayslateness ";
$timetoreview = round(max(0,
($status->decks[2]->lastaccess + ($flashcard->deck3_delay * HOURSECS) - time()) / DAYSECS));
$strtimetoreview = get_string('timetoreview', 'flashcard', $timetoreview);
for ($i = 0; $i < min($dayslateness, floor($flashcard->deck3_delay / 24)); $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/clock.png\" valign=\"bottom\" />";
}
if ($dayslateness < $flashcard->deck3_delay / 24) {
for (; $i < $flashcard->deck3_delay / 24; $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/shadowclock.png\" valign=\"bottom\" title=\"$strtimetoreview\" />";
}
} elseif ($dayslateness > $flashcard->deck3_delay / 24) {
for ($i = 0;
$i < min($dayslateness - floor($flashcard->deck3_delay / 24), $flashcard->deck3_release / 24);
$i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/overtime.png\" valign=\"bottom\" />";
}
}
$str .= '</td></tr></table>';
} else {
$str .= "<div height=\"12px\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topempty.png\" title=\"$strtimetoreview\" /></div>";
}
}
if ($flashcard->decks >= 4) {
$str .= "</td><td>" . $OUTPUT->pix_icon('a/r_breadcrumb', 'right breadcrumb icon') . "</td><td width=\"30%\" align=\"center\">";
// print for deck 4
if ($status->decks[3]->count) {
$image = ($status->decks[3]->reactivate) ? 'topenabled' : 'topdisabled';
$height = $status->decks[3]->count * 3;
$str .= "<table cellspacing=\"2\"><tr><td><div style=\"padding-bottom: {$height}px\" class=\"graphdeck\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/{$image}.png\" title=\"" . get_string('cardsindeck',
'flashcard', $status->decks[3]->count) . "\"/></div></td><td>";
$dayslateness = floor((time() - $status->decks[3]->lastaccess) / DAYSECS);
$timetoreview = round(max(0,
($status->decks[3]->lastaccess + ($flashcard->deck4_delay * HOURSECS) - time()) / DAYSECS));
$strtimetoreview = get_string('timetoreview', 'flashcard', $timetoreview);
for ($i = 0; $i < min($dayslateness, floor($flashcard->deck4_delay / 24)); $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/clock.png\" valign=\"bottom\" />";
}
if ($dayslateness < $flashcard->deck4_delay / 24) {
for (; $i < $flashcard->deck4_delay / 24; $i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/shadowclock.png\" valign=\"bottom\" />";
}
} elseif ($dayslateness > $flashcard->deck4_delay / 24) {
for ($i = 0;
$i < min($dayslateness - floor($flashcard->deck4_delay / 24), $flashcard->deck4_release / 24);
$i++) {
$str .= "<img src=\"{$CFG->wwwroot}/mod/flashcard/pix/overtime.png\" valign=\"bottom\" />";
}
}
$str .= '</td></tr></table>';
} else {
$str .= "<div height=\"12px\" align=\"top\"><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topempty.png\" /></div>";
}
}
$str .= '</td></tr></table><br/>';
$options['id'] = $flashcard->cm->id;
$options['view'] = 'summary';
$options['what'] = 'reset';
$options['userid'] = $userid;
$str .= $OUTPUT->single_button(new moodle_url("view.php", $options), get_string('reset'), 'get');
if ($return) return $str;
echo $str;
}
/**
* prints some statistic counters about decks
* @param reference $flashcard
* @param boolean $return
* @param int $userid
* @uses $USER
* @uses $CFG
* @uses $DB
*/
function flashcard_print_deckcounts($flashcard, $return, $userid = 0) {
global $USER, $CFG, $DB;
if ($userid == 0) $userid = $USER->id;
$sql = "
SELECT
MIN(accesscount) AS minaccess,
MAX(accesscount) AS maxaccess,
AVG(accesscount) AS avgaccess,
SUM(accesscount) AS sumaccess
FROM
{flashcard_card}
WHERE
flashcardid = ? AND
userid = ?
";
$rec = $DB->get_record_sql($sql, array($flashcard->id, $userid));
$strminaccess = get_string('minaccess', 'flashcard');
$strmaxaccess = get_string('maxaccess', 'flashcard');
$stravgaccess = get_string('avgaccess', 'flashcard');
$strsumaccess = get_string('sumaccess', 'flashcard');
$str = "<table><tr valign=\"top\"><td class=\"smalltext\"><b>$strminaccess</b>:</td>";
$str .= "<td class=\"smalltext\">{$rec->minaccess}</td></tr>";
$str .= "<tr valign=\"top\"><td class=\"smalltext\"><b>$strmaxaccess</b>:</td>";
$str .= "<td class=\"smalltext\">{$rec->maxaccess}</td></tr>";
$str .= "<tr valign=\"top\"><td class=\"smalltext\"><b>$stravgaccess</b>:</td>";
$str .= "<td class=\"smalltext\">{$rec->avgaccess}</td></tr>";
$str .= "<tr valign=\"top\"><td class=\"smalltext\"><b>$strsumaccess</b>:</td>";
$str .= "<td class=\"smalltext\">{$rec->sumaccess}</td></tr></table>";
if ($return) return $str;
echo $str;
}
/**
* prints an image on card side.
* @param reference $flashcard the flashcard object
* @param string $imagename
* @param boolean $return
* @uses $CFG
* @uses $COURSE
*/
function flashcard_print_image(&$flashcard, $imagename, $return = false) {
global $CFG, $COURSE;
$strmissingimage = get_string('missingimage', 'flashcard');
if (empty($imagename)) return $strmissingimage;
$imagepath = ($CFG->slasharguments) ? "/{$COURSE->id}/{$imagename}" : "?file=/{$COURSE->id}/{$imagename}";
if (file_exists($CFG->dataroot . "/{$COURSE->id}/{$imagename}")) {
$imagehtml = "<img src=\"{$CFG->wwwroot}/file.php{$imagepath}\" />";
} else {
$imagehtml = "<span class=\"error\">$strmissingimage</span>";
}
if (!$return) echo $imagehtml;
return $imagehtml;
}
/**
* plays a soundcard
* @param reference $flashcard
* @param string $soundname the local name of the sound file. Should be wav or any playable sound format.
* @param string $autostart if 'true' the sound starts playing immediately
* @param boolean $return if true returns the html string
* @uses $CFG
* @uses $COURSE
*/
function flashcard_play_sound(&$flashcard, $soundname, $autostart = 'false', $return = false, $htmlname = '') {
global $CFG, $COURSE;
$strmissingsound = get_string('missingsound', 'flashcard');
if (empty($soundname)) return $strmissingsound;
$magic = rand(0, 100000);
if ($htmlname == '') $htmlname = "bell_{$magic}";
$soundpath = ($CFG->slasharguments) ? "/{$COURSE->id}/{$soundname}" : "?file=/{$COURSE->id}/{$soundname}";
if (file_exists($CFG->dataroot . "/{$COURSE->id}/{$soundname}")) {
$soundhtml = "<embed src=\"{$CFG->wwwroot}/file.php{$soundpath}\" autostart=\"$autostart\" hidden=\"false\" id=\"{$htmlname}\" height=\"30\" width=\"150\" />";
} else {
$soundhtml = "<span class=\"error\">$strmissingsound</span>";
}
if (!$return) echo $soundhtml;
return $soundhtml;
}
/**
* initialize decks for a given user. The initialization is soft as it will
* be able to add new subquestions
* @param reference $flashcard
* @param int $userid
* @ues $DB
*/
function flashcard_initialize(&$flashcard, $userid) {
global $DB;
// get all cards (all decks)
$cards = $DB->get_records_select('flashcard_card', 'flashcardid = ? AND userid = ?', array($flashcard->id, $userid));
$registered = array();
if (!empty($cards)) {
foreach ($cards as $card) {
$registered[] = $card->entryid;
}
}
// get all subquestions
if ($subquestions = $DB->get_records('flashcard_deckdata', array('flashcardid' => $flashcard->id), '', 'id,id')) {
foreach ($subquestions as $subquestion) {
if (in_array($subquestion->id, $registered)) continue;
$card = new StdClass();
$card->userid = $userid;
$card->flashcardid = $flashcard->id;
$card->lastaccessed = time() - ($flashcard->deck1_delay * HOURSECS);
$card->deck = 1;
$card->entryid = $subquestion->id;
if (!$DB->insert_record('flashcard_card', $card)) {
print_error('dbcouldnotinsert', 'flashcard');
}
}
} else {
return false;
}
return true;
}
/**
* get count, last access time and reactivability for all decks
* @param reference $flashcard
* @param int $userid
* @uses $USER
* @uses $DB
*/
function flashcard_get_deck_status(&$flashcard, $userid = 0) {
global $USER, $DB;
if ($userid == 0) $userid = $USER->id;
$status = new stdClass();
$dk3 = 0;
$dk4 = 0;
$dk1 = $DB->count_records('flashcard_card', array('flashcardid' => $flashcard->id, 'userid' => $userid, 'deck' => 1));
$status->decks[0] = new stdClass();
$status->decks[0]->count = $dk1;
$dk2 = $DB->count_records('flashcard_card', array('flashcardid' => $flashcard->id, 'userid' => $userid, 'deck' => 2));
$status->decks[1] = new stdClass();
$status->decks[1]->count = $dk2;
if ($flashcard->decks >= 3) {
$dk3 = $DB->count_records('flashcard_card',
array('flashcardid' => $flashcard->id, 'userid' => $userid, 'deck' => 3));
$status->decks[2] = new stdClass();
$status->decks[2]->count = $dk3;
}
if ($flashcard->decks >= 4) {
$dk4 = $DB->count_records('flashcard_card',
array('flashcardid' => $flashcard->id, 'userid' => $userid, 'deck' => 4));
$status->decks[3] = new stdClass();
$status->decks[3]->count = $dk4;
}
// not initialized for this user
if ($dk1 + $dk2 + $dk3 + $dk4 == 0) {
return null;
}
if ($dk1 > 0) {
$status->decks[0]->lastaccess = flashcard_get_lastaccessed($flashcard, 1, $userid);
$status->decks[0]->reactivate = (time() > ($status->decks[0]->lastaccess + $flashcard->deck1_delay * HOURSECS));
}
if ($dk2 > 0) {
$status->decks[1]->lastaccess = flashcard_get_lastaccessed($flashcard, 2, $userid);
$status->decks[1]->reactivate = (time() > ($status->decks[1]->lastaccess + $flashcard->deck2_delay * HOURSECS));
}
if ($flashcard->decks >= 3 && $dk3 > 0) {
$status->decks[2]->lastaccess = flashcard_get_lastaccessed($flashcard, 3, $userid);
$status->decks[2]->reactivate = (time() > ($status->decks[2]->lastaccess + $flashcard->deck3_delay * HOURSECS));
}
if ($flashcard->decks >= 4 && $dk4 > 0) {
$status->decks[3]->lastaccess = flashcard_get_lastaccessed($flashcard, 4, $userid);
$status->decks[3]->reactivate = (time() > ($status->decks[3]->lastaccess + $flashcard->deck4_delay));
}
return $status;
}
/**
* get card status structure
* @param reference $flashcard
* @uses $CFG
* @uses $DB
*/
function flashcard_get_card_status(&$flashcard) {
global $CFG, $DB;
// get decks by card
$sql = "
SELECT
dd.questiontext,
COUNT(c.id) as amount,
c.deck AS deck
FROM
{flashcard_deckdata} dd
LEFT JOIN
{flashcard_card} c
ON
c.entryid = dd.id
WHERE
c.flashcardid = ?
GROUP BY
c.entryid,
c.deck
";
$recs = $DB->get_records_sql($sql, array($flashcard->id));
// get accessed by card
$sql = "
SELECT
dd.questiontext,
SUM(accesscount) AS accessed
FROM
{flashcard_deckdata} dd
LEFT JOIN
{flashcard_card} c
ON
c.entryid = dd.id
WHERE
c.flashcardid = ?
GROUP BY
c.entryid
";
$accesses = $DB->get_records_sql($sql, array($flashcard->id));
$cards = array();
foreach ($recs as $question => $rec) {
if ($rec->deck == 1) $cards[$question]->deck[0] = $rec->amount;
if ($rec->deck == 2) $cards[$question]->deck[1] = $rec->amount;
if ($rec->deck == 3) $cards[$question]->deck[2] = $rec->amount;
if ($rec->deck == 4) $cards[$question]->deck[3] = $rec->amount;
$cards[$question]->accesscount = $accesses[$question]->accessed;
}
return $cards;
}
/**
* prints a graphical represnetation of decks, proportionnaly to card count
* @param reference $flashcard
* @param object $card
* @param boolean $return
* @uses $CFG
*/
function flashcard_print_cardcounts(&$flashcard, $card, $return = false) {
global $CFG;
$str = '';
$strs[] = "<td><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topenabled.png\" /> (1) </td><td>" . '<div class="bar" style="height: 10px; width: ' . (1 + @$card->deck[0]) . 'px"></div></td>';
$strs[] = "<td><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topenabled.png\" /> (2) </td><td>" . '<div class="bar" style="height: 10px; width: ' . (1 + @$card->deck[1]) . 'px"></div></td>';
if ($flashcard->decks >= 3) {
$strs[] = "<td><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topenabled.png\" /> (3) </td><td>" . '<div class="bar" style="height: 10px; width: ' . (1 + @$card->deck[2]) . 'px"></div></td>';
}
if ($flashcard->decks >= 4) {
$strs[] = "<td><img src=\"{$CFG->wwwroot}/mod/flashcard/pix/topenabled.png\" /> (4) </td><td>" . '<div class="bar" style="height: 10px; width: ' . (1 + @$card->deck[3]) . 'px"></div></td>';
}
$str = "<table cellspacing=\"2\"><tr valign\"middle\">" . implode("</tr><tr valign=\"middle\">", $strs) . "</tr></table>";
if ($return) return $str;
echo $str;
}
/**
* Get array of questions & answers for edit $page
* If $page == -1 then take the last page
* @param type $flashcard
* @param type $page
*/
function flashcard_get_page($flashcard, $page) {
global $DB, $CFG;
if ($page == -1) {
//take the last page
$cardsnum = $DB->count_records('flashcard_deckdata', array('flashcardid' => $flashcard->id));
$page = (int) ($cardsnum / FLASHCARD_CARDS_PER_PAGE);
}
$cards = $DB->get_records('flashcard_deckdata', array('flashcardid' => $flashcard->id), 'id', '*',
FLASHCARD_CARDS_PER_PAGE * $page, FLASHCARD_CARDS_PER_PAGE);
$cm = get_coursemodule_from_instance('flashcard', $flashcard->id);
$context = context_module::instance($cm->id);
$ret = new object();
$ret->answer = array();
$ret->question = array();
$ret->id = array();
$editoroptions = array('context'=>$context ,'maxfiles' => EDITOR_UNLIMITED_FILES, 'maxbytes'=>$CFG->maxbytes, 'trusttext'=>true, 'noclean'=>true);
$i = 0;
foreach ($cards as $card) {
$itemid = NULL;
$currenttext = file_prepare_draft_area($itemid, $context->id, 'mod_flashcard', 'question', $card->id,
$editoroptions, $card->questiontext);
$ret->question[$i] = array('text' => $currenttext, 'format' => 1, 'itemid' => $itemid);
$itemid = NULL;
$currenttext = file_prepare_draft_area($itemid, $context->id, 'mod_flashcard', 'answer', $card->id,
$editoroptions, $card->answertext);
$ret->answer[$i] = array('text' => $currenttext, 'format' => 1, 'itemid' => $itemid);
$ret->id[$i] = $card->id;
$i++;
}
return $ret;
}