#!/usr/bin/python3
###############################################################################
# $Id: vec_tr_spat.py d7e898f6034a9c6c0f83cfbff921434dfc2082be 2018-04-18 23:07:52 +1000 Ben Elliston $
#
# Project:  OGR Python samples
# Purpose:  Apply a transformation to all OGR geometries.
# Author:   Frank Warmerdam, warmerdam@pobox.com
#
###############################################################################
# Copyright (c) 2006, Frank Warmerdam <warmerdam@pobox.com>
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
###############################################################################

import sys

from osgeo import ogr

#############################################################################


def Usage():
    print('Usage: vec_tr_spat.py [-spat xmin ymin xmax ymax] infile outfile [layer]')
    print('')
    sys.exit(1)

#############################################################################
# Argument processing.


infile = None
outfile = None
layer_name = None

i = 1
while i < len(sys.argv):
    arg = sys.argv[i]

    if arg == '-spat':
        s_minx = int(sys.argv[i + 1])
        s_miny = int(sys.argv[i + 2])
        s_maxx = int(sys.argv[i + 3])
        s_maxy = int(sys.argv[i + 4])
        i = i + 4

    elif infile is None:
        infile = arg

    elif outfile is None:
        outfile = arg

    elif layer_name is None:
        layer_name = arg

    else:
        Usage()

    i = i + 1

if outfile is None:
    Usage()

#############################################################################
# Open the datasource to operate on.

in_ds = ogr.Open(infile, update=0)

if layer_name is not None:
    in_layer = in_ds.GetLayerByName(layer_name)
else:
    in_layer = in_ds.GetLayer(0)

in_defn = in_layer.GetLayerDefn()

#############################################################################
# Create output file with similar information.

shp_driver = ogr.GetDriverByName('ESRI Shapefile')
shp_driver.DeleteDataSource(outfile)

shp_ds = shp_driver.CreateDataSource(outfile)

shp_layer = shp_ds.CreateLayer(in_defn.GetName(),
                               geom_type=in_defn.GetGeomType(),
                               srs=in_layer.GetSpatialRef())

in_field_count = in_defn.GetFieldCount()

for fld_index in range(in_field_count):
    src_fd = in_defn.GetFieldDefn(fld_index)

    fd = ogr.FieldDefn(src_fd.GetName(), src_fd.GetType())
    fd.SetWidth(src_fd.GetWidth())
    fd.SetPrecision(src_fd.GetPrecision())
    shp_layer.CreateField(fd)

#############################################################################
# Apply spatial query.

in_layer.SetSpatialFilterRect(s_minx, s_miny, s_maxx, s_maxy)

#############################################################################
# Setup rect geometry to try intersect with.

ring = ogr.Geometry(ogr.wkbLinearRing)
ring.AddPoint_2D(s_minx, s_miny)
ring.AddPoint_2D(s_maxx, s_miny)
ring.AddPoint_2D(s_maxx, s_maxy)
ring.AddPoint_2D(s_minx, s_maxy)
ring.AddPoint_2D(s_minx, s_miny)

filt_geom = ogr.Geometry(ogr.wkbPolygon)
filt_geom.AddGeometry(ring)

#############################################################################
# Process all features in input layer.

in_feat = in_layer.GetNextFeature()
while in_feat is not None:

    geom = in_feat.GetGeometryRef()

    if geom.Intersect(filt_geom) != 0:
        out_feat = ogr.Feature(feature_def=shp_layer.GetLayerDefn())
        out_feat.SetFrom(in_feat)

        shp_layer.CreateFeature(out_feat)
        out_feat.Destroy()

    in_feat.Destroy()
    in_feat = in_layer.GetNextFeature()

#############################################################################
# Cleanup

shp_ds.Destroy()
in_ds.Destroy()