# -*- coding: utf-8 -*-
"""
/***************************************************************************
 SaveAttributes
                                 A QGIS plugin
 This plugin adds an algorithm to save attributes of selected layer as a CSV file
 Generated by Plugin Builder: http://g-sherman.github.io/Qgis-Plugin-Builder/
                              -------------------
        begin                : 2019-09-18
        copyright            : (C) 2019 by Ujaval Gandhi
        email                : ujaval@spatialthoughts.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
 This script initializes the plugin, making it known to QGIS.
"""

__author__ = 'Ujaval Gandhi'
__date__ = '2019-09-18'
__copyright__ = '(C) 2019 by Ujaval Gandhi'


# noinspection PyPep8Naming
def classFactory(iface):  # pylint: disable=invalid-name
    """Load SaveAttributes class from file SaveAttributes.

    :param iface: A QGIS interface instance.
    :type iface: QgsInterface
    """
    #
    from .save_attributes_processing import SaveAttributesPlugin
    return SaveAttributesPlugin(iface)

# -*- coding: utf-8 -*-

"""
/***************************************************************************
 SaveAttributes
                                 A QGIS plugin
 This plugin adds an algorithm to save attributes of selected layer as a CSV file
 Generated by Plugin Builder: http://g-sherman.github.io/Qgis-Plugin-Builder/
                              -------------------
        begin                : 2019-09-18
        copyright            : (C) 2019 by Ujaval Gandhi
        email                : ujaval@spatialthoughts.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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__ = 'Ujaval Gandhi'
__date__ = '2019-09-18'
__copyright__ = '(C) 2019 by Ujaval Gandhi'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os
import sys
import inspect

from qgis.PyQt.QtWidgets import QAction
from qgis.PyQt.QtGui import QIcon

from qgis.core import QgsProcessingAlgorithm, QgsApplication
import processing
from .save_attributes_processing_provider import SaveAttributesProvider

cmd_folder = os.path.split(inspect.getfile(inspect.currentframe()))[0]

if cmd_folder not in sys.path:
    sys.path.insert(0, cmd_folder)


class SaveAttributesPlugin(object):

    def __init__(self, iface):
        self.provider = None
        self.iface = iface

    def initProcessing(self):
        """Init Processing provider for QGIS >= 3.8."""
        self.provider = SaveAttributesProvider()
        QgsApplication.processingRegistry().addProvider(self.provider)

    def initGui(self):
        self.initProcessing()

        icon = os.path.join(os.path.join(cmd_folder, 'logo.png'))
        self.action = QAction(
            QIcon(icon),
            u"Save Attributes as CSV", self.iface.mainWindow())
        self.action.triggered.connect(self.run)
        self.iface.addPluginToMenu(u"&SaveAttributes", self.action)
        self.iface.addToolBarIcon(self.action)

    def unload(self):
        QgsApplication.processingRegistry().removeProvider(self.provider)
        self.iface.removePluginMenu(u"&SaveAttributes", self.action)
        self.iface.removeToolBarIcon(self.action)
        
    def run(self):
      processing.execAlgorithmDialog("Save Attributes:Save Attributes as CSV")

# -*- coding: utf-8 -*-

"""
/***************************************************************************
 SaveAttributes
                                 A QGIS plugin
 This plugin adds an algorithm to save attributes of selected layer as a CSV file
 Generated by Plugin Builder: http://g-sherman.github.io/Qgis-Plugin-Builder/
                              -------------------
        begin                : 2019-09-18
        copyright            : (C) 2019 by Ujaval Gandhi
        email                : ujaval@spatialthoughts.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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__ = 'Ujaval Gandhi'
__date__ = '2019-09-18'
__copyright__ = '(C) 2019 by Ujaval Gandhi'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os
import inspect
from qgis.PyQt.QtGui import QIcon

from qgis.PyQt.QtCore import QCoreApplication
from qgis.core import (QgsProcessing,
                       QgsFeatureSink,
                       QgsProcessingAlgorithm,
                       QgsProcessingParameterFeatureSource,
                       QgsProcessingParameterFileDestination)


class SaveAttributesAlgorithm(QgsProcessingAlgorithm):
    """
    This is an example algorithm that takes a vector layer and
    creates a new identical one.

    It is meant to be used as an example of how to create your own
    algorithms and explain methods and variables used to do it. An
    algorithm like this will be available in all elements, and there
    is not need for additional work.

    All Processing algorithms should extend the QgsProcessingAlgorithm
    class.
    """

    # Constants used to refer to parameters and outputs. They will be
    # used when calling the algorithm from another algorithm, or when
    # calling from the QGIS console.

    OUTPUT = 'OUTPUT'
    INPUT = 'INPUT'

    def initAlgorithm(self, config):
        """
        Here we define the inputs and output of the algorithm, along
        with some other properties.
        """

        # We add the input vector features source. It can have any kind of
        # geometry.
        self.addParameter(
            QgsProcessingParameterFeatureSource(
                self.INPUT,
                self.tr('Input layer'),
                [QgsProcessing.TypeVectorAnyGeometry]
            )
        )

        # We add a file output of type CSV.
        self.addParameter(
            QgsProcessingParameterFileDestination(
                self.OUTPUT,
                self.tr('Output File'),
                'CSV files (*.csv)',
            )
        )

    def processAlgorithm(self, parameters, context, feedback):
        """
        Here is where the processing itself takes place.
        """
        source = self.parameterAsSource(parameters, self.INPUT, context)
        csv = self.parameterAsFileOutput(parameters, self.OUTPUT, context)

        fieldnames = [field.name() for field in source.fields()]

        # Compute the number of steps to display within the progress bar and
        # get features from source
        total = 100.0 / source.featureCount() if source.featureCount() else 0
        features = source.getFeatures()

        with open(csv, 'w') as output_file:
          # write header
          line = ','.join(name for name in fieldnames) + '\n'
          output_file.write(line)
          for current, f in enumerate(features):
              # Stop the algorithm if cancel button has been clicked
              if feedback.isCanceled():
                  break

              # Add a feature in the sink
              line = ','.join(str(f[name]) for name in fieldnames) + '\n'
              output_file.write(line)

              # Update the progress bar
              feedback.setProgress(int(current * total))

        return {self.OUTPUT: csv}

    def name(self):
        """
        Returns the algorithm name, used for identifying the algorithm. This
        string should be fixed for the algorithm, and must not be localised.
        The name should be unique within each provider. Names should contain
        lowercase alphanumeric characters only and no spaces or other
        formatting characters.
        """
        return 'Save Attributes as CSV'

    def displayName(self):
        """
        Returns the translated algorithm name, which should be used for any
        user-visible display of the algorithm name.
        """
        return self.tr(self.name())

    def group(self):
        """
        Returns the name of the group this algorithm belongs to. This string
        should be localised.
        """
        return self.tr(self.groupId())

    def groupId(self):
        """
        Returns the unique ID of the group this algorithm belongs to. This
        string should be fixed for the algorithm, and must not be localised.
        The group id should be unique within each provider. Group id should
        contain lowercase alphanumeric characters only and no spaces or other
        formatting characters.
        """
        return ''

    def tr(self, string):
        return QCoreApplication.translate('Processing', string)

    def icon(self):
        """
        Should return a QIcon which is used for your provider inside
        the Processing toolbox.
        """
        cmd_folder = os.path.split(inspect.getfile(inspect.currentframe()))[0]
        icon = QIcon(os.path.join(os.path.join(cmd_folder, 'logo.png')))
        return icon
        
    def createInstance(self):
        return SaveAttributesAlgorithm()

# -*- coding: utf-8 -*-

"""
/***************************************************************************
 SaveAttributes
                                 A QGIS plugin
 This plugin adds an algorithm to save attributes of selected layer as a CSV file
 Generated by Plugin Builder: http://g-sherman.github.io/Qgis-Plugin-Builder/
                              -------------------
        begin                : 2019-09-18
        copyright            : (C) 2019 by Ujaval Gandhi
        email                : ujaval@spatialthoughts.com
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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__ = 'Ujaval Gandhi'
__date__ = '2019-09-18'
__copyright__ = '(C) 2019 by Ujaval Gandhi'

# This will get replaced with a git SHA1 when you do a git archive

__revision__ = '$Format:%H$'

import os
import inspect
from qgis.PyQt.QtGui import QIcon

from qgis.core import QgsProcessingProvider
from .save_attributes_processing_algorithm import SaveAttributesAlgorithm


class SaveAttributesProvider(QgsProcessingProvider):

    def __init__(self):
        """
        Default constructor.
        """
        QgsProcessingProvider.__init__(self)

    def unload(self):
        """
        Unloads the provider. Any tear-down steps required by the provider
        should be implemented here.
        """
        pass

    def loadAlgorithms(self):
        """
        Loads all algorithms belonging to this provider.
        """
        self.addAlgorithm(SaveAttributesAlgorithm())
        # add additional algorithms here
        # self.addAlgorithm(MyOtherAlgorithm())

    def id(self):
        """
        Returns the unique provider id, used for identifying the provider. This
        string should be a unique, short, character only string, eg "qgis" or
        "gdal". This string should not be localised.
        """
        return 'Save Attributes'

    def name(self):
        """
        Returns the provider name, which is used to describe the provider
        within the GUI.

        This string should be short (e.g. "Lastools") and localised.
        """
        return self.tr('Save Attributes')

    def icon(self):
        """
        Should return a QIcon which is used for your provider inside
        the Processing toolbox.
        """
        cmd_folder = os.path.split(inspect.getfile(inspect.currentframe()))[0]
        icon = QIcon(os.path.join(os.path.join(cmd_folder, 'logo.png')))
        return icon

    def longName(self):
        """
        Returns the a longer version of the provider name, which can include
        extra details such as version numbers. E.g. "Lastools LIDAR tools
        (version 2.2.1)". This string should be localised. The default
        implementation returns the same string as name().
        """
        return self.name()