src - Add initial support for osm xml (Ref: #12)

overpy/format/osm_xml.py

@@ -0,0 +1,106 @@
+from xml.sax.saxutils import escape
+
+import overpy
+
+
+def dump(result, fp):
+    """
+
+    :param result:
+    :type result: overpy.Result
+    :param fp:
+    :return:
+    """
+    fp.write('<?xml version="1.0" encoding="UTF-8"?>\n')
+    fp.write('<osm version="0.6" generator="OverPy {0}">\n'.format(overpy.__version__))
+    lat_min = result.nodes[0].lat
+    lat_max = lat_min
+    lon_min = result.nodes[0].lon
+    lon_max = lon_min
+    for node in result.nodes:
+        if node.lat < lat_min:
+            lat_min = node.lat
+        elif node.lat > lat_max:
+            lat_max = node.lat
+
+        if node.lon < lon_min:
+            lon_min = node.lon
+        elif node.lon > lon_max:
+            lon_max = node.lon
+
+    fp.write(
+        '<bounds minlat="{0:f}" minlon="{1:f}" maxlat="{2:f}" maxlon="{3:f}"/>\n'.format(
+            lat_min,
+            lat_max,
+            lon_min,
+            lon_max
+        )
+    )
+
+    for node in result.nodes:
+        fp.write(
+            '<node id="{0:d}" lat="{1:f}" lon="{2:f}"'.format(
+                node.id,
+                node.lat,
+                node.lon
+            )
+        )
+        if len(node.tags) == 0:
+            fp.write('/>\n')
+            continue
+        fp.write('>\n')
+        for k, v in node.tags.items():
+            fp.write(
+                '<tag k="{0:s}" v="{1:s}"/>\n'.format(
+                    escape(k),
+                    escape(v)
+                )
+            )
+        fp.write('</node>\n')
+
+    for way in result.ways:
+        fp.write('<way id="{0:d}"'.format(node.id))
+        if len(way.nodes) == 0 and len(way.tags) == 0:
+            fp.write('/>\n')
+            continue
+        fp.write('>\n')
+        for node in way.nodes:
+            fp.write('<nd ref="{0:d}"/>\n'.format(node.id))
+
+        for k, v in way.tags.items():
+            fp.write(
+                '<tag k="{0:s}" v="{1:s}"/>\n'.format(
+                    escape(k),
+                    escape(v)
+                )
+            )
+
+        fp.write('</way>\n')
+
+    for relation in result.relations:
+        fp.write('<relation id="{0:d}'.format(relation.id))
+        if len(relation.tags) == 0 and len(relation.members) == 0:
+            fp.write('/>\n')
+
+        for member in relation.members:
+            if not isinstance(member, overpy.RelationMember):
+                continue
+            fp.write(
+                '<member type="{0:s}" ref="{1:d}" role="{2:s}"/>\n'.format(
+                    member._type_value,
+                    member.ref,
+                    member.role
+                )
+            )
+
+        for k, v in relation.tags.items():
+            fp.write(
+                '<tag k="{0:s}" v="{1:s}"/>\n'.format(
+                    escape(k),
+                    escape(v)
+                )
+            )
+
+        fp.write('</relation>\n')
+
+    fp.write('</osm>')