boards/abstracts/settingsmanager.py

from boards import settings
from boards.models import Tag, TagAlias, Attachment
from boards.models.attachment import AttachmentSticker
from boards.models.thread import FAV_THREAD_NO_UPDATES
from boards.models.user import UserSettings
from boards.settings import SECTION_VIEW

MAX_TRIPCODE_COLLISIONS = 50

__author__ = 'neko259'

SESSION_SETTING = 'setting'

SETTING_THEME = 'theme'
SETTING_FAVORITE_TAGS = 'favorite_tags'
SETTING_FAVORITE_THREADS = 'favorite_threads'
SETTING_HIDDEN_TAGS = 'hidden_tags'
SETTING_USERNAME = 'username'
SETTING_LAST_NOTIFICATION_ID = 'last_notification'
SETTING_IMAGE_VIEWER = 'image_viewer'
SETTING_IMAGES = 'images_aliases'
SETTING_ONLY_FAVORITES = 'only_favorites'

DEFAULT_THEME = 'md'


class SettingsManager:
    """
    Base settings manager class. get_setting and set_setting methods should
    be overriden.
    """
    def __init__(self):
        pass

    def get_theme(self) -> str:
        theme = self.get_setting(SETTING_THEME)
        if not theme:
            theme = DEFAULT_THEME
            self.set_setting(SETTING_THEME, theme)

        return theme

    def set_theme(self, theme):
        self.set_setting(SETTING_THEME, theme)

    def get_setting(self, setting, default=None):
        pass

    def set_setting(self, setting, value):
        pass

    def get_fav_tags(self) -> list:
        tag_names = self.get_setting(SETTING_FAVORITE_TAGS)
        tags = []
        if tag_names:
            tags = list(Tag.objects.filter(aliases__in=TagAlias.objects
                .filter_localized(parent__aliases__name__in=tag_names))
                .order_by('aliases__name'))
        return tags

    def add_fav_tag(self, tag):
        tags = self.get_setting(SETTING_FAVORITE_TAGS)
        if not tags:
            tags = [tag.get_name()]
        else:
            if not tag.get_name() in tags:
                tags.append(tag.get_name())

        tags.sort()
        self.set_setting(SETTING_FAVORITE_TAGS, tags)

    def del_fav_tag(self, tag):
        tags = self.get_setting(SETTING_FAVORITE_TAGS)
        if tag.get_name() in tags:
            tags.remove(tag.get_name())
            self.set_setting(SETTING_FAVORITE_TAGS, tags)

    def get_hidden_tags(self) -> list:
        tag_names = self.get_setting(SETTING_HIDDEN_TAGS)
        tags = []
        if tag_names:
            tags = list(Tag.objects.filter(aliases__in=TagAlias.objects
                .filter_localized(parent__aliases__name__in=tag_names))
                .order_by('aliases__name'))

        return tags

    def add_hidden_tag(self, tag):
        tags = self.get_setting(SETTING_HIDDEN_TAGS)
        if not tags:
            tags = [tag.get_name()]
        else:
            if not tag.get_name() in tags:
                tags.append(tag.get_name())

        tags.sort()
        self.set_setting(SETTING_HIDDEN_TAGS, tags)

    def del_hidden_tag(self, tag):
        tags = self.get_setting(SETTING_HIDDEN_TAGS)
        if tag.get_name() in tags:
            tags.remove(tag.get_name())
            self.set_setting(SETTING_HIDDEN_TAGS, tags)

    def get_fav_threads(self) -> dict:
        return self.get_setting(SETTING_FAVORITE_THREADS, default=dict())

    def add_or_read_fav_thread(self, opening_post):
        threads = self.get_fav_threads()

        max_fav_threads = settings.get_int(SECTION_VIEW, 'MaxFavoriteThreads')
        if (str(opening_post.id) in threads) or (len(threads) < max_fav_threads):
            thread = opening_post.get_thread()
            # Don't check for new posts if the thread is archived already
            if thread.is_archived():
                last_id = FAV_THREAD_NO_UPDATES
            else:
                last_id = thread.get_replies().last().id
            threads[str(opening_post.id)] = last_id
            self.set_setting(SETTING_FAVORITE_THREADS, threads)

    def del_fav_thread(self, opening_post):
        threads = self.get_fav_threads()
        if self.thread_is_fav(opening_post):
            del threads[str(opening_post.id)]
            self.set_setting(SETTING_FAVORITE_THREADS, threads)

    def thread_is_fav(self, opening_post):
        return str(opening_post.id) in self.get_fav_threads()

    def get_notification_usernames(self):
        names = set()
        name_list = self.get_setting(SETTING_USERNAME)
        if name_list is not None:
            name_list = name_list.strip()
            if len(name_list) > 0:
                names = name_list.lower().split(',')
                names = set(name.strip() for name in names)
        return names

    def get_attachment_by_alias(self, alias):
        images = self.get_setting(SETTING_IMAGES)
        if images and alias in images:
            try:
                return Attachment.objects.get(id=images.get(alias))
            except Attachment.DoesNotExist:
                self.remove_attachment_alias(alias)

    def add_attachment_alias(self, alias, attachment):
        images = self.get_setting(SETTING_IMAGES)
        if images is None:
            images = dict()
        images[alias] = attachment.id
        self.set_setting(SETTING_IMAGES, images)

    def remove_attachment_alias(self, alias):
        images = self.get_setting(SETTING_IMAGES)
        del images[alias]
        self.set_setting(SETTING_IMAGES, images)

    def get_stickers(self):
        images = self.get_setting(SETTING_IMAGES)
        stickers = []
        if images:
            for key, value in images.items():
                try:
                    attachment = Attachment.objects.get(id=value)
                    stickers.append(AttachmentSticker(name=key, attachment=attachment))
                except Attachment.DoesNotExist:
                    self.remove_attachment_alias(key)
        return stickers

    def tag_is_fav(self, tag):
        fav_tag_names = self.get_setting(SETTING_FAVORITE_TAGS)
        return fav_tag_names is not None and tag.get_name() in fav_tag_names

    def tag_is_hidden(self, tag):
        hidden_tag_names = self.get_setting(SETTING_HIDDEN_TAGS)
        return hidden_tag_names is not None and tag.get_name() in hidden_tag_names


class SessionSettingsManager(SettingsManager):
    """
    Session-based settings manager. All settings are saved to the user's
    session.
    """
    def __init__(self, session):
        SettingsManager.__init__(self)
        self.session = session

    def get_setting(self, setting, default=None):
        if setting in self.session:
            return self.session[setting]
        else:
            self.set_setting(setting, default)
            return default

    def set_setting(self, setting, value):
        self.session[setting] = value


class DatabaseSettingsManager(SessionSettingsManager):
    def __init__(self, session):
        super().__init__(session)
        self.settings, created = UserSettings.objects.get_or_create(session_key=session.session_key)

    def add_fav_tag(self, tag):
        self.settings.fav_tags.add(tag)

    def del_fav_tag(self, tag):
        self.settings.fav_tags.remove(tag)

    def get_fav_tags(self) -> list:
        return self.settings.fav_tags.filter(
            aliases__in=TagAlias.objects.filter_localized())\
            .order_by('aliases__name')

    def get_hidden_tags(self) -> list:
        return self.settings.hidden_tags.all()

    def add_hidden_tag(self, tag):
        self.settings.hidden_tags.add(tag)
        
    def del_hidden_tag(self, tag):
        self.settings.hidden_tags.remove(tag)

    def tag_is_fav(self, tag):
        return self.settings.fav_tags.filter(id=tag.id).exists()

    def tag_is_hidden(self, tag):
        return self.settings.hidden_tags.filter(id=tag.id).exists()


def get_settings_manager(request) -> SettingsManager:
    """
    Get settings manager based on the request object. Currently only
    session-based manager is supported. In the future, cookie-based or
    database-based managers could be implemented.
    """
    return DatabaseSettingsManager(request.session)