ArtNet-Desktop/ArtNet/artnet_manager.py

import sys
import os
from hashlib import md5

from PyQt5.QtWidgets import QApplication

from ArtNet.db.db_adapter import DBAdapter
from ArtNet.file.file_reader import FileReader
from ArtNet.file.config_reader import ConfigReader
from ArtNet.gui.window import Window
from ArtNet.gui.dialogs.db_connection_dialog.db_dialog import DBDialog
from ArtNet.web.link_generator import LinkGenerator


class ArtNetManager:

    def __init__(self, config_location: str = "."):
        self.config = ConfigReader(config_location, "somePassword")
        self.db_connection = None
        self.__app = QApplication(sys.argv)

        while self.db_connection is None:
            try:
                self.db_connection = self.create_db_connection(user=self.config.data["db"]["user"],
                                                               password=self.config.data["db"]["password"],
                                                               host=self.config.data["db"]["host"],
                                                               port=self.config.data["db"]["port"],
                                                               database=self.config.data["db"]["database"])
            except ValueError as e:  # db connection didn't work
                print(e)
                dialog = DBDialog()
                prev_db_data = self.get_db_connection_details()
                dialog.ui.user_line_edit.setText(prev_db_data["user"])
                dialog.ui.password_line_edit.setText(prev_db_data["password"])
                dialog.ui.host_line_edit.setText(prev_db_data["host"])
                dialog.ui.database_line_edit.setText(prev_db_data["database"])
                dialog.ui.port_line_edit.setText(str(prev_db_data["port"]))

                db_data: dict = dialog.exec_()
                if len(db_data.keys()) == 0:
                    return
                self.change_db_connection(host=db_data["host"], port=db_data["port"],
                                                 user=db_data["user"], password=db_data["password"],
                                                 database=db_data["database"])
        self.window = Window(self)

        # TODO prompt for overwriting config when password invalid
        # TODO sane default location
        # TODO tag editor, don't kill dialog if fields are missing
        # TODO display Tag Category when searching for tags

        # TODO remove string limit restrictions on implications & similar

        self.__file_root: str = None
        self.window.on_artnet_root_change_clicked()
        self.__file_reader = FileReader(self.__file_root)

        self.curr_image_index: int = None

        self.all_images: list = None
        self.update_all_images_list()

        self.window.set_temporary_status_message("Hello o7", 5000)

    def run(self):
        if len(self.all_images) > 0:
            self.curr_image_index = 0
        self.change_image()

        self.window.show()

        sys.exit(self.__app.exec_())

    def update_all_images_list(self):
        """
        Updates the internal list of all images in the artnet root
        :return:
        """
        images = []
        artist_list = self.__file_reader.list_artists()
        artist_list.sort()
        for artist in artist_list:
            for image in self.__file_reader.get_files(artist):
                images.append(image)
        self.all_images = images

        self.known_image_amount = 0
        for image in self.all_images:
            if self.db_connection.get_art_by_path(image) is not None:
                self.known_image_amount += 1

    def scrape_tags(self, file_name: str, art_ID: int, url: str=None):
        """
        Scrape the tags from the given url and return which one's are new
        :param file_name:
        :param art_ID:
        :param url:
        :return:
        """
        if url is None:
            return None

        #tags = ArtNet.web.Scrap_Tags.scrap_tags(file_name, url, ArtNet.web.link_generator.predict_domain(file_name))
        tags = LinkGenerator.get_instance().scrape_tags(url, LinkGenerator.get_instance().predict_domain(file_name))
        if tags is None:
            return None

        already_applied_tags = self.db_connection.get_art_tags_by_ID(art_ID)
        for i in range(len(already_applied_tags)):
            already_applied_tags[i] = self.db_connection.get_tag_by_ID(already_applied_tags[i])[0][1].strip()

        importable_tags = []
        importable_artists = []
        scraped_tags = []
        for i in tags.values():
            scraped_tags += i

        for tag in scraped_tags:
            result = self.db_connection.get_tag_by_name(tag)
            if len(result) == 0:  # tag does not exist yet
                if tag in tags['artists']:
                    importable_artists.append(tag)
                    continue
                importable_tags.append(tag)
                continue

            if tag in already_applied_tags:  # tag is already applied
                continue

            result = self.db_connection.get_tag_impliers(tag)
            if len(result) != 0:  # tag is implied by some other tag
                continue

            result = self.db_connection.get_tag_aliases_by_name(tag)
            if len(result) != 0:  # tag is already tagged by an alias
                continue

            if tag in tags['artists']:
                importable_artists.append(tag)
                continue
            importable_tags.append(tag)  # tag must be known and not tagged yet

        return importable_tags, importable_artists

    def import_tags(self, art_ID: int, tags):
        """
        Add a list of given tags to the specified art_ID
        :param art_ID:
        :param tags:
        :return:
        """
        for tag in tags:

            if len(self.db_connection.get_tag_by_name(tag)) == 0:  # tag doesn't exist yet
                result = self.window.force_edit_tag_dialog(name=tag)

                if result is None:  # tag creation was aborted
                    continue

                tag = result['name']  # overwrite with possibly new tag name

            tag = self.db_connection.get_tag_by_name(tag)[0][0]
            self.window.curr_tags.append(tag)
            self.window.data_changed = True

    def get_md5_of_image(self, path: str):
        """
        Calculate the md5 hash of the image given by the path.

        :param path: assumed to be relative e.g. artist_A/image.jpg
        :return:
        """
        md5_hash = md5()
        try:
            with open(self.get_root() + os.path.sep + path,
                      "rb") as file:  # read file part by part because of potential memory limits
                for chunk in iter(lambda: file.read(4096), b""):
                    md5_hash.update(chunk)

            return md5_hash.hexdigest()
        except FileNotFoundError:
            self.update_all_images_list()
            return None

    def delete_image(self, path: str, delete_instead_of_move: bool = False, trash_bin_folder_path: str = "trash"):
        """
        Deletes the image from the root folder
        :param path:
        :param delete_instead_of_move:
        :param trash_bin_folder_path:
        :return:
        """
        full_art_path = self.get_root() + os.path.sep + path

        if delete_instead_of_move:
            print(f"Deleting the actual file {full_art_path} is disabled for now")
            #os.remove(full_art_path)
            #return

        trash_dst = trash_bin_folder_path + os.path.sep + path
        t_splits = trash_dst.split(os.path.sep)
        t_path = ""
        for i in range(len(t_splits)-1):
            t_path += os.path.sep + t_splits[i]
        t_path = t_path[1:]
        if not os.path.exists(t_path):
            print(f"{t_path} did not exist and will be created!")
            os.makedirs("."+os.path.sep+t_path)
        os.rename(full_art_path, trash_dst)
        print(f"Moving image {full_art_path} to {trash_dst}")

        self.update_all_images_list()
        while self.curr_image_index >= len(self.all_images):
            self.curr_image_index -= 1



    @DeprecationWarning
    def recalculate_hash_for_known_images(self):
        """
        Calculate and write the md5 hash for every image known to the database.

        Important: For migration purposes only
        :return:
        """
        for i in range(len(self.all_images)):
            image_db_result = self.db_connection.get_art_by_path(self.all_images[i])
            file_name = os.path.basename(self.all_images[i])
            if image_db_result is None:  # unknown image, skip
                continue

            hash_digest = self.get_md5_of_image(self.all_images[i])

            authors = self.db_connection.get_authors_of_art_by_ID(image_db_result["ID"])
            tag_ids = self.db_connection.get_art_tags_by_ID(art_ID=image_db_result["ID"])
            tags = []
            for tag_id in tag_ids:
                tags.append(self.db_connection.get_tag_by_ID(tag_id)[0][1].strip())

            if image_db_result["title"] == file_name or len(image_db_result["title"]) == 0:
                image_db_result["title"] = None

            self.db_connection.save_image(ID=image_db_result["ID"], path=image_db_result["path"],
                                          title=image_db_result["title"],
                                          link=image_db_result["link"], authors=authors, md5_hash=hash_digest,
                                          tags=tags)

    def get_next_unknown_image(self) -> int:
        """
        Search all images for the next image not known to the database in ascending order.

        :return: index of the next unknown image, None if there is no unknown image
        """
        next_unknown: int = None
        curr_searched_image_index = self.curr_image_index + 1

        finished_loop = False
        while next_unknown is None and not finished_loop:
            if curr_searched_image_index >= len(self.all_images):  # wrap around to the start
                curr_searched_image_index = 0
            if curr_searched_image_index == self.curr_image_index:  # searched all images, nothing unknown
                break

            image_db_result = self.db_connection.get_art_by_path(self.all_images[curr_searched_image_index])
            if image_db_result is None:
                image_db_result = self.db_connection.get_art_by_hash(
                    self.get_md5_of_image(self.all_images[curr_searched_image_index])
                )

            if image_db_result is None:  # image is unknown to database
                next_unknown = curr_searched_image_index
                break
            else:
                curr_searched_image_index += 1

        if next_unknown:
            return curr_searched_image_index
        else:
            return None

    def get_prev_unknown_image(self) -> int:
        """
        Search all images for the next image not known to the databse in descending order.

        :return:index of the next unknown image, None if there is no unknown image
        """
        next_unknown: int = None
        curr_searched_image_index = self.curr_image_index - 1

        finished_loop = False
        while next_unknown is None and not finished_loop:
            if curr_searched_image_index <= 0:  # wrap around to the end
                curr_searched_image_index = len(self.all_images) - 1
            if curr_searched_image_index == self.curr_image_index:  # searched all images, nothing unknown
                break

            image_db_result = self.db_connection.get_art_by_path(self.all_images[curr_searched_image_index])

            if image_db_result is None:  # image is unknown to database
                next_unknown = curr_searched_image_index
                break
            else:
                curr_searched_image_index -= 1

        if next_unknown:
            return curr_searched_image_index
        else:
            return None

    def change_image(self):
        """
        Refresh the image display to show the most current data according to the selected image
        :return:
        """
        self.window.setting_up_data = True

        image_db_result = self.db_connection.get_art_by_hash(
            self.get_md5_of_image(self.all_images[self.curr_image_index])
        )
        #image_db_result = self.db_connection.get_art_by_path(self.all_images[self.curr_image_index])
        s = self.all_images[self.curr_image_index].split(os.path.sep)
        if image_db_result is not None:
            image_title = image_db_result["title"] if isinstance(image_db_result["title"], str) and \
                                                      len(image_db_result["title"]) > 0 else self.window.UNKNOWN_TITLE
            image_author = self.db_connection.get_authors_of_art_by_ID(image_db_result["ID"])
            image_link = image_db_result["link"]
            art_ID = image_db_result["ID"]
            if image_author is None or len(image_author) == 0:
                image_author = [(self.all_images[self.curr_image_index].split(os.path.sep)[0], "(Not in Database)")]
        else:
            art_ID = None
            image_author = [(s[0], "(Not in Database)")]
            image_title = s[-1] + " (Not in Database)"
            image_link = "(Unknown)"

        print("Displaying", self.all_images[self.curr_image_index])
        self.window.display_image(image_title, image_author,
                                  os.path.join(self.__file_root, self.all_images[self.curr_image_index]),
                                  self.all_images[self.curr_image_index],
                                  art_ID, image_link, file_name=s[-1])
        self.window.set_tag_list([self.db_connection.get_tag_by_ID(x)[0][1].strip() for x in self.db_connection.get_art_tags_by_ID(art_ID)])

        self.window.data_changed = False
        self.window.setting_up_data = False

    def create_db_connection(self, host: str, port: int, database: str, user: str, password: str) -> DBAdapter:
        print("Changing db connection to ".format(host, port, user, password))
        return DBAdapter(user=user, password=password, host=host, port=port, database=database)

    def get_root(self) -> str:
        return self.__file_root

    def change_root(self, path: str):
        """
        Change the Artnet root path and confirm it is working.

        Rewrite config there
        :param path:
        :return:
        """
        if len(path) == 0:
            exit(0)
        print("Changing root to", path)
        self.__file_root = path

    def get_db_connection_details(self) -> dict:
        return self.config.data["db"]

    def change_db_connection(self, host: str, port: int, database: str, user: str, password: str):
        self.config.data["db"]["user"] = user
        self.config.data["db"]["password"] = password
        self.config.data["db"]["host"] = host
        self.config.data["db"]["database"] = database
        self.config.data["db"]["port"] = str(port)

        self.config.update_config()

        self.db_connection = self.create_db_connection(host, port, database, user, password)