extrahiere Text aus PDF

1 files changed, 105 insertions, 1 deletions

diff --git a/js/index.js b/js/index.js
index 99d78ea..8bb0dd8 100644
--- a/js/index.js
+++ b/js/index.js
@@ -49,6 +49,69 @@ function fillform(){
     }
 }
 
+function parseVertretungen(str){
+    var vertretungen_re = new RegExp('(\\w+)\\s+(\\d(?:\\s+-\\s+\\d)?)\\s+((?:x\\s+)?)(\\+|\\w+|---)\\s+(\\w+|---)\\s+(\\w+|---)\\s+(.*?)\\s+(\\w+)(?:\\s+)?(.*?)');
+    var res;
+    var vertretungen = [];
+
+    console.log(vertretungen_re.toString());
+
+    str.split('\n').forEach(function(vertretungsstr){
+        res = vertretungsstr.match(vertretungen_re)
+
+        if(res !== null){
+            var klasse = res[1];
+            var stunde = res[2].replace(/ /g, '');
+            var entfall = res[3].indexOf('x') > -1;
+            var vertreter = res[4];
+            var fach = res[5];
+            var raum = res[6];
+            var art = res[7];
+            var lehrer = res[8];
+            var info = res[9];
+
+            if(entfall == true){
+                if(art.length <= 1){
+                    art = "";
+                }else{
+                    art = " " + art;
+                }
+
+                if(info.length <= 1){
+                    info = "";
+                }else{
+                    info = " Info:" + info;
+                }
+
+                vertretungen.push(klasse + " " + stunde + ". Stunde Entfall statt " + lehrer + art + info);
+            }else{
+                if(art.length <= 1){
+                    art = "";
+                }else{
+                    art = art + " in ";
+                }
+
+                if(info.length <= 1){
+                    info = "";
+                }else{
+                    info = " Info:" + info;
+                }
+
+                var nlehrer;
+
+                if(lehrer != vertreter){
+                    nlehrer = " bei " + vertreter + " (statt " + lehrer + ")";
+                }
+
+                vertretungen.push(klasse + " " + stunde + ". Stunde " + art + fach + nlehrer + " in Raum " + raum + info);
+            }
+        }
+    });
+
+    console.log(JSON.stringify(vertretungen));
+    return vertretungen;
+}
+
 /* PDF Rendering */
 function renderPage($div, pdf, pageNumber, callback){
     pdf.getPage(pageNumber).then(function(page){
@@ -77,7 +140,48 @@ function renderPage($div, pdf, pageNumber, callback){
             canvasContext: context,
             viewport: viewport
         };
-        page.render(renderContext).promise.then(callback);
+
+        page.render(renderContext).promise.then(function(pdf){
+            page.getTextContent().then(function(textContent){ // Text extrahieren
+                var page_text = "";
+                var last_block = null;
+                 
+                for(j = 0; j < textContent.length; j++){
+                    var block = textContent[j];
+                    if(last_block != null && last_block.str[last_block.str.length - 1] != ' '){
+                        if(block.x < last_block.x){
+                            page_text += '\n';
+                        }else if(last_block.y != block.y && (last_block.str.match(/^(\s?[a-zA-Z])$|^(.+\s[a-zA-Z])$/) == null )){
+                            page_text += '\n';
+                        }
+                    }
+                     
+                    page_text += block.str;
+                    last_block = block;
+                }
+
+                var highlights = [];
+                var vertretungen = parseVertretungen(page_text);
+                var username = getuserdata()[0];
+
+                if(username !== null){
+                    var klasse = username.match(/(\w+)_.*/);
+
+                    if(klasse !== null){
+                        vertretungen.forEach(function(vertretung){
+                            if(vertretung.indexOf(klasse[1]) > -1){
+                                hightlights.push(vertretung);
+                                console.log('Wichtige Vertretung: ' + vertretung);
+                            }
+                        });
+                    }
+                }
+
+                // TODO mach etwas mit den Vertretungen
+            });
+
+            callback(pdf);
+        });
     });
 }