SPARQL UPDATE form by Michal Dobija

39ad4b00 · Krzysztof Kutt · 7438eeaf · 39ad4b00 · 39ad4b00
Commit 39ad4b00 authored 7 years ago by Krzysztof Kutt
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with 80 additions and 0 deletions
+80 -0
--- a/loki/sparql/update.php
+++ b/loki/sparql/update.php
+<?php
+#ini_set('display_errors',1);
+#ini_set('display_startup_errors',1);
+#error_reporting(E_ALL);
+
+if(isset($_GET['query']) && !empty($_GET['query'])){
+    $result = parse_command($_GET['query']);
+    if($result){
+        echo "Query successfull";
+    }else{
+        echo "Query failed";
+    }
+}else {
+    require_once './update_form.php';
+}
+
+function insert_clause($name, $value, $filename){
+    $fileContents = file_get_contents($filename);
+    $fileContents = $fileContents.'[['.$name.':'.$value.'|]]'.PHP_EOL;
+    file_put_contents($filename, $fileContents);
+}
+
+function remove_clause($name, $value, $filename){
+    $fileContents = file_get_contents($filename);
+    $fileContents = preg_replace("/\[\[".$name.":".$value."\|\]\]\n?/",'',$fileContents);
+    file_put_contents($filename, $fileContents);
+}
+
+//WARNING: This assumes this file is in /dokuwiki/sparql
+function convert_to_path($pagename){
+    $output = dirname(__DIR__).'/data/pages'.'/'.preg_replace('/:/','/',$pagename).'.txt';
+    return $output;
+}
+
+function parse_command($command){
+    $result = preg_match("/delete data.*{[\n\s]*([^\s]*)\s*([^\s]*)\s*([^\s]*)\s*\.\n}/is",$command,$matches);
+    if($result == 1 && check_can_edit($matches[1])){
+        remove_clause($matches[2],$matches[3],convert_to_path($matches[1]));
+        return TRUE;
+    }
+    $result = preg_match("/insert data.*{[\n\s]*([^\s]*)\s*([^\s]*)\s*([^\s]*)\s*\.\n}/is",$command,$matches);
+    if($result == 1 && check_can_edit($matches[1])){
+        insert_clause($matches[2],$matches[3],convert_to_path($matches[1]));
+        return TRUE;
+    }
+    return FALSE;
+}
+//WARNING: This assumes this file is in /dokuwiki/sparql. Takes page in the "category:page" form
+function check_can_edit($pagename){
+    $address = 'http://'.preg_replace("#sparql/test.php#",'doku.php?id='.$pagename.'&do=edit',$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']);
+    $contents = file_get_contents($address);
+    if(preg_match("/.*this page is read only.*/i",$contents) || preg_match("/.*This page is currently locked.*/i",$contents)){
+        return FALSE;
+    }
+    return TRUE;
+}
+?>
--- a/loki/sparql/update_form.php
+++ b/loki/sparql/update_form.php
+<!DOCTYPE html>
+
+<html xmlns="http://www.w3.org/1999/xhtml">
+  <head><title>Loki SPARQL Endpoint</title>
+    <link rel="stylesheet" type="text/css" href="fuseki.css" />
+  </head>
+  <body>
+    <h1>Loki SPARQL SELECT Endpoint</h1>
+    <div class="moreindent">
+
+      <form method="get">
+      <p> Currently the only accepted format is "INSERT DATA"/"DELETE DATA" (case insensitive), followed by "{". then the triple, separated with any whitespace and ending with a dot (there has to be whitespace between the triple and the dot), then "}". Newlines are ignored.
+	<p>
+	  <textarea style="background-color: #F0F0F0;" name="query" id="query" cols="80" rows="20"></textarea>
+        <br/>
+	  <input type="submit" value="Modify Data"/>
+	</p>
+      </form>
+    
+    </div>
+    <hr/>
+  </body>
+</html>