Add configuration support

checkins/tools/config.php.sample

@@ -1,8 +1,16 @@
 <?php
 
+# Edit the database hostname, username, password and database name
+# to match your privatesquare instance.
+
 $config['hostname'] = 'localhost';
 $config['user'] = 'user';
 $config['password'] = 'password';
 $config['database'] = 'privatesquare';
 
+# Edit to match the user id your Foursquare account has in privatesquare. If you're the
+# sole user, you can probably leave this unchanged (see the users table)
+
+$config['userid'] = 1;
+
 ?>

checkins/tools/extract-checkins.php

@@ -0,0 +1,145 @@
+<?php
+
+require_once('./config.php');
+
+$CHECKIN_SQL = sprintf('SELECT id, venue_id FROM PrivatesquareCheckins WHERE user_id = %u;', $config['userid']);
+$VENUE_SQL = "SELECT data FROM FoursquareVenues WHERE venue_id = '%s';";
+
+$venues = array ();
+$geo = array ();
+$features = array ();
+
+$sqli = new mysqli(
+	$config['hostname'],
+	$config['user'],
+	$config['password'],
+	$config['database']);
+if ($sqli->connect_errno) {
+	echo 'Failed to connect to MySQL: (' . $sqli->connect_errno . ') ' . $sqli->connect_error;
+	exit;
+}
+
+$res = $sqli->query($CHECKIN_SQL);
+if (FALSE === $res) {
+	echo 'Query failed' . PHP_EOL;
+	if ($sqli->errno) {
+		echo 'Failed on query ' . $sql . ': (' . $sqli->errno . ') ' . $sqli->error . PHP_EOL;
+		exit;
+	}
+}
+
+while ($row = $res->fetch_assoc()) {
+	$venue_id = $row['venue_id'];
+	if (!empty($venue_id)) {
+		if (array_key_exists($venue_id, $venues)) {
+			$venues[$venue_id]++;
+		}
+		else {
+			$venues[$venue_id] = 1;
+		}
+	}
+}
+
+$res->free();
+
+$geo['type'] = 'FeatureCollection';
+$maxvcount = 0;
+
+foreach ($venues as $vid => $vcount) {
+	if ($vcount > $maxvcount) {
+		$maxvcount = $vcount;
+	}
+
+	$sql = sprintf($VENUE_SQL, $vid);
+	$res = $sqli->query($sql);
+	if ($sqli->errno) {
+		echo 'Failed on query ' . $sql . ': (' . $sqli->errno . ') ' . $sqli->error;
+		exit;
+	}
+
+	$row = $res->fetch_assoc();
+	$json = json_decode($row['data']);
+	if (NULL === $json) {
+		echo 'Failed to decode JSON (' . json_last_error() . ')';
+		switch (json_last_error()) {
+	        case JSON_ERROR_NONE:
+	            echo ' - No errors';
+	        	break;
+	        case JSON_ERROR_DEPTH:
+	            echo ' - Maximum stack depth exceeded';
+	        	break;
+	        case JSON_ERROR_STATE_MISMATCH:
+	            echo ' - Underflow or the modes mismatch';
+	        	break;
+	        case JSON_ERROR_CTRL_CHAR:
+	            echo ' - Unexpected control character found';
+	        	break;
+	        case JSON_ERROR_SYNTAX:
+	            echo ' - Syntax error, malformed JSON';
+	        	break;
+	        case JSON_ERROR_UTF8:
+	            echo ' - Malformed UTF-8 characters, possibly incorrectly encoded';
+	        	break;
+	        default:
+	            echo ' - Unknown error';
+	        	break;
+	    }
+		echo PHP_EOL;
+		exit;
+	}
+	$skip = false;
+	if (count($json->categories) == 0) {
+		$skip = true;
+	}
+	else {
+		$pos = strpos($json->categories[0]->name, '(private)');
+		if ($pos !== false) {
+			$skip = true;
+		}
+	}
+
+	if (!$skip) {
+		$geometry = array(
+			'type' => 'Point',
+			'coordinates' => array($json->location->lng, $json->location->lat)
+		);
+
+		$properties = array(
+			'name' => $json->name,
+			'venue' => $vid,
+			'checkins' => $vcount
+		);
+
+		$feature = array(
+			'type' => 'Feature',
+			'geometry' => $geometry,
+			'properties' => $properties
+		);
+
+		$features[] = $feature;
+	}
+
+	$res->free();
+}
+
+$sqli->close();
+
+$geo['max-checkins'] = $maxvcount;
+$geo['features'] = $features;
+$geo['time-stamp'] = date(DATE_COOKIE, time());
+
+$pos = strpos(phpversion(), '5.4');
+if (0 === $pos) {
+	$geojson = json_encode($geo, JSON_PRETTY_PRINT);
+}
+else {
+	$geojson = json_encode($geo);
+}
+
+$contents = array();
+$contents[] = 'var checkins = ';
+$contents[] = $geojson;
+$contents[] = ';';
+file_put_contents('../js/checkins-geojson.js', implode('', $contents));
+
+?>