Major refactoring.

roentgen/osm_getter.py

@@ -0,0 +1,48 @@
+import re
+import sys
+
+sys.path.append('../lib')
+
+import network
+
+
+usage = '<box coordinates: left,bottom,right,top>'
+
+if len(sys.argv) < 2:
+    print('Usage: python ' + sys.argv[0] + ' ' + usage)
+    sys.exit(0)
+
+boundary_box = sys.argv[1]
+
+result_file_name = '../map/' + boundary_box + '.xml'
+
+matcher = re.match('(?P<left>[0-9\\.-]*),(?P<bottom>[0-9\\.-]*),' + \
+    '(?P<right>[0-9\\.-]*),(?P<top>[0-9\\.-]*)', boundary_box)
+
+
+def error(message=None):
+    if message:
+        print('Error: ' + message + '.')
+    else:
+        print('Error.')
+    sys.exit(1)
+
+
+if not matcher:
+    error('invalid boundary box')
+else:
+    try:
+        left = float(matcher.group('left'))
+        bottom = float(matcher.group('bottom'))
+        right = float(matcher.group('right'))
+        top = float(matcher.group('top'))
+    except Exception as e:
+        error('parsing boundary box')
+    if left >= right:
+        error('negative horisontal boundary')
+    if bottom >= top:
+        error('negative vertical boundary')
+    if right - left > 0.5 or top - bottom > 0.5:
+        error('box too big')
+    content = network.get_content('api.openstreetmap.org/api/0.6/map',
+            {'bbox': boundary_box}, result_file_name, 'html')