Add getter for the list of the authors of a document

Author: AlessioLuciani

CHANGELOG.md

@@ -1,3 +1,8 @@
+## 0.3.0
+
+* A class for the PDF document information has been added. Now this information
+is retrieved on the initialization of the document.
+
 ## 0.2.2
 
 * Code formatting has been improved and minor issues solved.

README.md

@@ -18,7 +18,7 @@ Add this to your package's `pubspec.yaml` file:
 
 ```yaml
 dependencies:
-  pdf_text: ^0.2.2
+  pdf_text: ^0.3.0
 ```
 
 ## Usage

example/lib/main.dart

@@ -93,14 +93,6 @@ class _MyAppState extends State<MyApp> {
   Future _pickPDFText() async {
     File file = await FilePicker.getFile();
     _pdfDoc = await PDFDoc.fromFile(file);
-    print(_pdfDoc.info.producer);
-    print(_pdfDoc.info.creator);
-    print(_pdfDoc.info.creationDate);
-    print(_pdfDoc.info.modificationDate);
-    print(_pdfDoc.info.subject);
-    print(_pdfDoc.info.keywords);
-    print(_pdfDoc.info.title);
-    print(_pdfDoc.info.author);
     setState(() {});
   }
 

lib/pdf_text.dart

@@ -204,9 +204,38 @@ class PDFDocInfo {
       this._title,
       this._subject);
 
-  /// Gets the author of the document. Returns null if no author exists.
+  /// Gets the author of the document. This contains the original string of the
+  /// authors contained in the document. Therefore there might be multiple
+  /// authors separated by comma. Returns null if no author exists.
   String get author => _author;
 
+  /// Gets the list of authors of the document. This is inferred by splitting
+  /// the author string by comma. Returns null if no author exists.
+  List<String> get authors {
+    if (author == null) {
+      return null;
+    }
+    var authorString = author.replaceAll(";", ",");
+    authorString = authorString.replaceAll("&", ",");
+    authorString = authorString.replaceAll("and", ",");
+    List<String> splitted = authorString.split(",");
+    List<String> ret = List();
+    for (var token in splitted) {
+      var start = 0;
+      var end = token.length - 1;
+      while (start < token.length && token[start] == ' ') {
+        start++;
+      }
+      while (end >= 0 && token[end] == ' ') {
+        end--;
+      }
+      if (end - start >= 0) {
+        ret.add(token.substring(start, end + 1));
+      }
+    }
+    return ret;
+  }
+
   /// Gets the creation date of the document. Returns null if no creation
   /// date exists.
   DateTime get creationDate => _creationDate;