firescarmapper.py

# -*- coding: utf-8 -*-
"""
/***************************************************************************
 FireScarMapper
                                 A QGIS plugin
 Generate georeferenced fire scar rasters using a pre-trained U-Net model and analyze the impact of fire events by comparing pre- and post-fire satellite images.
 Generated by Plugin Builder: http://g-sherman.github.io/Qgis-Plugin-Builder/
                              -------------------
        begin                : 2024-11-25
        git sha              : $Format:%H$
        copyright            : (C) 2024 by Fire 2A
        email                : N/A
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/
"""

# Initialize Qt resources from file resources.py
# Import the code for the dialog
from .firescarmapper_dialog import FireScarMapperDialog

from .resources import *
import os.path
from qgis.core import (Qgis, QgsProcessingAlgorithm,QgsProject, QgsRasterLayer, QgsProcessingException, 
                       QgsSingleBandPseudoColorRenderer, QgsRasterMinMaxOrigin, QgsColorRampShader, QgsRasterShader, QgsStyle, QgsContrastEnhancement)
from qgis.PyQt.QtCore import QSettings, QTranslator, QCoreApplication, Qt
import torch
from .firescarmapping.model_u_net import model, device
from .firescarmapping.as_dataset import create_datasetAS
from .firescarmapping.dataset_128 import create_dataset128
import numpy as np
from torch.utils.data import DataLoader
import os
from osgeo import gdal, gdal_array
import requests
from qgis.PyQt.QtGui import QIcon
from qgis.PyQt.QtWidgets import QAction, QDockWidget


class FireScarMapper:
    """QGIS Plugin Implementation."""

    def __init__(self, iface):
        """Constructor.

        :param iface: An interface instance that will be passed to this class
            which provides the hook by which you can manipulate the QGIS
            application at run time.
        :type iface: QgsInterface
        """
        # Save reference to the QGIS interface
        self.iface = iface
        # initialize plugin directory
        self.plugin_dir = os.path.dirname(__file__)
        # initialize locale
        locale = QSettings().value('locale/userLocale')[0:2]
        locale_path = os.path.join(
            self.plugin_dir,
            'i18n',
            'FireScarMapper_{}.qm'.format(locale))

        if os.path.exists(locale_path):
            self.translator = QTranslator()
            self.translator.load(locale_path)
            QCoreApplication.installTranslator(self.translator)

        # Declare instance attributes
        self.actions = []
        self.menu = self.tr(u'&Fire Scar Mapper')

        # Check if plugin was started the first time in current QGIS session
        # Must be set in initGui() to survive plugin reloads
        self.first_start = None

    # noinspection PyMethodMayBeStatic
    def tr(self, message):
        """Get the translation for a string using Qt translation API.

        We implement this ourselves since we do not inherit QObject.

        :param message: String for translation.
        :type message: str, QString

        :returns: Translated version of message.
        :rtype: QString
        """
        # noinspection PyTypeChecker,PyArgumentList,PyCallByClass
        return QCoreApplication.translate('FireScarMapper', message)

    def add_action(
        self,
        icon_path,
        text,
        callback,
        enabled_flag=True,
        add_to_menu=True,
        add_to_toolbar=True,
        status_tip=None,
        whats_this=None,
        parent=None):
        """Add a toolbar icon to the toolbar.

        :param icon_path: Path to the icon for this action. Can be a resource
            path (e.g. ':/plugins/foo/bar.png') or a normal file system path.
        :type icon_path: str

        :param text: Text that should be shown in menu items for this action.
        :type text: str

        :param callback: Function to be called when the action is triggered.
        :type callback: function

        :param enabled_flag: A flag indicating if the action should be enabled
            by default. Defaults to True.
        :type enabled_flag: bool

        :param add_to_menu: Flag indicating whether the action should also
            be added to the menu. Defaults to True.
        :type add_to_menu: bool

        :param add_to_toolbar: Flag indicating whether the action should also
            be added to the toolbar. Defaults to True.
        :type add_to_toolbar: bool

        :param status_tip: Optional text to show in a popup when mouse pointer
            hovers over the action.
        :type status_tip: str

        :param parent: Parent widget for the new action. Defaults None.
        :type parent: QWidget

        :param whats_this: Optional text to show in the status bar when the
            mouse pointer hovers over the action.

        :returns: The action that was created. Note that the action is also
            added to self.actions list.
        :rtype: QAction
        """

        icon = QIcon(icon_path)
        action = QAction(icon, text, parent)
        action.triggered.connect(callback)
        action.setEnabled(enabled_flag)

        if status_tip is not None:
            action.setStatusTip(status_tip)

        if whats_this is not None:
            action.setWhatsThis(whats_this)

        if add_to_toolbar:
            # Adds plugin icon to Plugins toolbar
            self.iface.addToolBarIcon(action)

        if add_to_menu:
            self.iface.addPluginToMenu(
                self.menu,
                action)

        self.actions.append(action)

        return action

    def initGui(self):
        """Create the menu entries and toolbar icons inside the QGIS GUI."""

        icon_path = ':/plugins/FireScar-Mapper-Plugin/icon.png'
        self.add_action(
            icon_path,
            text=self.tr(u'Fire Scar Mapper'),
            callback=self.show_layer_selection_dialog,
            parent=self.iface.mainWindow())

        # will be set False in run()
        self.first_start = True

    def show_layer_selection_dialog(self):
        if not hasattr(self, 'dlg'):
            self.dlg = FireScarMapperDialog(self.iface)

            if self.dlg not in self.iface.mainWindow().findChildren(QDockWidget):
                self.iface.addDockWidget(Qt.LeftDockWidgetArea, self.dlg)

        self.dlg.show()
        self.dlg.raise_()
        self.dlg.activateWindow()

    def unload(self):
        """Removes the plugin menu item and icon from QGIS GUI."""
        for action in self.actions:
            self.iface.removePluginMenu(
                self.tr(u'&Fire Scar Mapper'),
                action)
            self.iface.removeToolBarIcon(action)

    def run(self):
        """Run method that performs all the real work"""

        # Create the dialog with elements (after translation) and keep reference
        # Only create GUI ONCE in callback, so that it will only load when the plugin is started
        
        
        if self.first_start == True:
            self.first_start = False
            self.dlg = FireScarMapperDialog(self.iface)

        if self.dlg not in self.iface.mainWindow().findChildren(QDockWidget):
            self.iface.addDockWidget(Qt.LeftDockWidgetArea, self.dlg)
        # show the dialog
        self.dlg.show()