/**
@param $prefix String to help locate the $target
Removes all entries from the CacheProvider.
*/
public static function cleanCache($prefix = '')
{
foreach (DataProvider::getStudies() as $s) {
$f = self::getPath($s, $prefix);
if (file_exists($f)) {
unlink($f);
}
}
}
/**
@return [String] of all Names in the Studies table
*/
public static function studies()
{
return DataProvider::getStudies();
}
/**
@param $table TableName
@param $target TableName | TablePrefix
@return $tNames [TableName]
1: If $target doesn't depend on study, its the TableName
2: If $table depends on study, $target should get the same
3: If $table doesn't depend, $target should be done for all studies.
*/
public static function getTableNamesFor($table, $target)
{
$tNames = self::getTableNames($target, self::$constraints[$target]);
if (count($tNames) === 1) {
return $tNames;
}
//https://stackoverflow.com/questions/834303/startswith-and-endswith-functions-in-php
$endsWith = function ($haystack, $needle) {
if ($needle === '') {
return true;
}
$t = strlen($haystack) - strlen($needle);
if ($t < 0) {
return false;
}
return strpos($haystack, $needle, $t) !== false;
};
//Searching possible study suffix:
foreach (DataProvider::getStudies() as $s) {
if ($endsWith($table, $s)) {
//Searching the only one:
foreach ($tNames as $t) {
if ($endsWith($t, $s)) {
return array($t);
}
}
}
}
return $tNames;
}
<?php
/**
It became apparent, that generating the JSON files export/download/$study.json
can be quite expansive, and may fail on our server iff memory or time consumption grow too high.
This is also documented in #237.
To combat this problem this script (re-)generates all the JSON files as necessary.
*/
chdir(__DIR__);
require_once '../config.php';
require_once '../query/cacheProvider.php';
chdir('..');
echo "Regenerating Study Cache:\n";
foreach (DataProvider::getStudies() as $study) {
if (CacheProvider::hasCache($study)) {
continue;
}
echo "{$study}..\n";
$chunk = DataProvider::getStudyChunk($study);
CacheProvider::setCache($study, json_encode($chunk));
}
echo "Done.\n";
1.: We offer a list of studies, and also global data applying to each study.
2.: Each study can be fetched separately.
3.: JavaScript will tack a timestamp on each study,
so that we can drop older studies from localStorage,
in case that we're running out of space.
4.: The data for each study thus consists of the following things:
- Name and basic data for the study itself
- A list of Families in the Study
- A list of Regions per Family
- A list of Languages per Region
- A list of Words per Study
- A list of Transcriptions per pair of Word and Language
- Defaults for the Study
*/
if (array_key_exists('global', $_GET)) {
echo Config::toJSON(array('studies' => DataProvider::getStudies(), 'global' => DataProvider::getGlobal()));
} else {
if (array_key_exists('study', $_GET)) {
if (CacheProvider::hasCache($_GET['study'])) {
echo CacheProvider::getCache($_GET['study']);
} else {
$ret = DataProvider::getStudyChunk($_GET['study']);
//Done:
$data = json_encode($ret);
echo $data;
CacheProvider::setCache($_GET['study'], $data);
}
} else {
echo json_encode(array('lastUpdate' => DataProvider::getLastImport(), 'Description' => 'Add a global parameter to fetch global data, ' . 'and add a study parameter to fetch a study.'));
}
}
