[#189 state:fixed] Added "Export to CSV" feature.

core/export.py

@@ -8,6 +8,7 @@
 
 import os.path as op
 from tempfile import mkdtemp
+import csv
 
 # Yes, this is a very low-tech solution, but at least it doesn't have all these annoying dependency
 # and resource problems.
@@ -119,12 +120,18 @@ def export_to_xhtml(colnames, rows):
         assert len(rows[0]) == len(colnames) + 1 # + 1 is for the "indented" flag
     colheaders = ''.join(COLHEADERS_TEMPLATE.format(name=name) for name in colnames)
     rendered_rows = []
+    previous_group_id = None
     for row in rows:
         # [2:] is to remove the indented flag + filename
-        indented = 'indented' if row[0] else ''
+        if row[0] != previous_group_id:
+            # We've just changed dupe group, which means that this dupe is a ref. We don't indent it.
+            indented = ''
+        else:
+            indented = 'indented'
         filename = row[1]
         cells = ''.join(CELL_TEMPLATE.format(value=value) for value in row[2:])
         rendered_rows.append(ROW_TEMPLATE.format(indented=indented, filename=filename, cells=cells))
+        previous_group_id = row[0]
     rendered_rows = ''.join(rendered_rows)
     # The main template can't use format because the css code uses {}
     content = MAIN_TEMPLATE.replace('$colheaders', colheaders).replace('$rows', rendered_rows)
@@ -134,3 +141,9 @@ def export_to_xhtml(colnames, rows):
     fp.write(content)
     fp.close()
     return destpath
+
+def export_to_csv(dest, colnames, rows):
+    writer = csv.writer(open(dest, 'wt', encoding='utf-8'))
+    writer.writerow(["Group ID"] + colnames)
+    for row in rows:
+        writer.writerow(row)