Add v.lrs.segment algorithm

python/plugins/processing/algs/grass7/description/v.lrs.segment.txt

@@ -0,0 +1,8 @@
+v.lrs.segment
+Creates points/segments from input lines, linear reference system and positions read from stdin or a file.
+Vector (v.*)
+ParameterVector|input|Input vector map containing lines|1|False
+ParameterTable|rstable|Name of the reference system table|False
+ParameterString|in_file|Inline rules for segment|None|True|True
+ParameterFile|file|Name of file containing segment rules|False|True
+OutputVector|output|Segments

python/plugins/processing/algs/grass7/ext/v_lrs_segment.py

@@ -0,0 +1,72 @@
+# -*- coding: utf-8 -*-
+
+"""
+***************************************************************************
+    v_lrs_segment.py
+    ----------------
+    Date                 : March 2016
+    Copyright            : (C) 2016 by Médéric Ribreux
+    Email                : medspx at medspx dot fr
+***************************************************************************
+*                                                                         *
+*   This program is free software; you can redistribute it and/or modify  *
+*   it under the terms of the GNU General Public License as published by  *
+*   the Free Software Foundation; either version 2 of the License, or     *
+*   (at your option) any later version.                                   *
+*                                                                         *
+***************************************************************************
+"""
+
+__author__ = 'Médéric Ribreux'
+__date__ = 'March 2016'
+__copyright__ = '(C) 2016, Médéric Ribreux'
+
+# This will get replaced with a git SHA1 when you do a git archive
+
+__revision__ = '$Format:%H$'
+
+
+def checkParameterValuesBeforeExecuting(alg):
+    """ Verify if we have the right parameters """
+    if alg.getParameterValue('in_file') and alg.getParameterValue(u'file'):
+        return alg.tr("You need to set either a segment rules file or write directly the rules!")
+
+    return None
+
+
+def processInputs(alg):
+    # We need to import the rstable
+    rstable = alg.getParameterValue('rstable')
+    if rstable in alg.exportedLayers.keys():
+        return
+    alg.exportedLayers[rstable] = alg.getTempFilename()
+    command = 'db.in.ogr input=\"{}\" output={} --overwrite'.format(
+        rstable,
+        alg.exportedLayers[rstable]
+    )
+    alg.commands.append(command)
+    alg.processInputs()
+
+
+def processCommand(alg):
+    in_file = alg.getParameterValue('in_file')
+    if in_file:
+        # Creates a temporary txt file
+        ruleFile = alg.getTempFilename()
+
+        # Inject rules into temporary txt file
+        with open(ruleFile, "w") as tempRules:
+            tempRules.write(in_file)
+    else:
+        ruleFile = alg.getParameterValue('file')
+
+    output = alg.getOutputFromName(u'output')
+    alg.exportedLayers[output.value] = output.name + alg.uniqueSufix
+
+    command = 'v.lrs.segment input={} file={} rstable={} output={} --overwrite'.format(
+        alg.exportedLayers[alg.getParameterValue('input')],
+        ruleFile,
+        alg.exportedLayers[alg.getParameterValue('rstable')],
+        alg.exportedLayers[output.value]
+    )
+    alg.commands.append(command)