creating an HTML Email template for notifications, which includes a logo file (#TODO: store logo within BreCal git). Built out most of the Notifier. Provided suitable SQLQueries and updated the EmailHandler.
This commit is contained in:
Max Metz
parent
cea615fe63
commit
9cef84a5a8
@ -266,6 +266,11 @@ class SQLQuery():
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query = "SELECT id, name, imo, callsign, participant_id, length, width, is_tug, bollard_pull, eni, created, modified, deleted FROM ship ORDER BY name"
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return query
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@staticmethod
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def get_ship_by_id()->str:
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query = "SELECT id, name, imo, callsign, participant_id, length, width, is_tug, bollard_pull, eni, created, modified, deleted FROM ship WHERE id = ?id?"
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return query
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@staticmethod
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def get_times()->str:
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query = "SELECT id, eta_berth, eta_berth_fixed, etd_berth, etd_berth_fixed, lock_time, lock_time_fixed, " + \
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@ -317,6 +322,22 @@ class SQLQuery():
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query = prefix+stage1+bridge+stage2+suffix
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return query
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@staticmethod
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def get_notifications_post(schemaModel:dict)->str:
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param_keys = {key:key for key in schemaModel.keys()}
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prefix = "INSERT INTO notification ("
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bridge = ") VALUES ("
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suffix = ")"
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non_dynamic_keys = ["id", "created", "modified"]
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stage1 = ",".join([key for key in schemaModel.keys() if not key in non_dynamic_keys])
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stage2 = ",".join([f"?{param_keys.get(key)}?" for key in schemaModel.keys() if not key in non_dynamic_keys])
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query = prefix+stage1+bridge+stage2+suffix
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return query
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@staticmethod
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def get_last_insert_id()->str:
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query = "select last_insert_id()"
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@ -1,7 +1,18 @@
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import typing
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import datetime
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from BreCal.database.sql_handler import execute_sql_query_standalone
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from BreCal.database.sql_queries import SQLQuery
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from BreCal.schemas import model
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from BreCal.brecal_utils.time_handling import difference_to_then
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from BreCal.schemas.model import ShipcallType
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eta_etd_type_dict = {
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ShipcallType.arrival : "Ankunft",
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ShipcallType.departure : "Abfahrt",
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ShipcallType.shifting : "Wechselnd"
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}
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class Notifier():
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"""
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@ -141,6 +152,8 @@ class Notifier():
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@staticmethod
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def create(shipcall_id, old_state, new_state, user, update_database:bool=False)->typing.Optional[model.Notification]:
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"""
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# #TODO_refactor: drastically change this method. It should only generate notifications, but not send them.
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Standalone function, which creates a Notification for a specific user.
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Steps:
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@ -173,6 +186,7 @@ class Notifier():
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# get a list of all subscribed notification types and track the state (success or failure)
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raise NotImplementedError("skeleton")
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successes = {}
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notification_type_list = Notifier.build_notification_type_list(user)
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for notification_type in notification_type_list:
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@ -183,7 +197,6 @@ class Notifier():
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success_state = Notifier.send_notification_by_type(notification_type, message)
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successes[notification_type] = success_state
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raise NotImplementedError("skeleton")
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notification = ...
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return notification
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@ -197,11 +210,10 @@ class Notifier():
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def get_users_via_history(shipcall_id:int)->list[model.User]:
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"""using the History objects, one can infer the user_id, which allows querying the Users"""
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histories = execute_sql_query_standalone(query=SQLQuery.get_history(), param={"shipcallid" : shipcall_id}, model=model.History, command_type="query")
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user_ids = [
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history.user_id
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for history in histories
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]
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users = [Notifier.get_user(user_id) for user_id in user_ids]
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assert isinstance(histories,list)
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assert all([isinstance(history,model.History) for history in histories])
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users = [Notifier.get_user(history.user_id) for history in histories]
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return users
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@staticmethod
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@ -307,7 +319,146 @@ class Notifier():
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raise ValueError(notification_type)
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return
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@staticmethod
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def get_eligible_shipcalls():
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"""
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get all eligible shipcalls, which do not have a sent notification yet
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criterion a) notification shall not be sent yet (evaluation_notifications_sent = 0)
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criterion b) evaluation state is yellow or red (type 2 or 3)
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"""
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query = 'SELECT * FROM shipcall WHERE (evaluation_notifications_sent = ?evaluation_notifications_sent?) AND (evaluation = 2 OR evaluation = 3)'
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evaluation_notifications_sent = 0
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eligible_shipcalls = execute_sql_query_standalone(query=query, model=model.Shipcall, param={"evaluation_notifications_sent" : evaluation_notifications_sent})
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return eligible_shipcalls
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@staticmethod
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def get_eligible_notifications_of_shipcall(shipcall:model.Shipcall, time_diff_threshold:float)->list[model.Notification]:
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"""obtain all notifications, which belong to the shipcall id"""
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query = SQLQuery.get_notifications()
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eligible_notifications = execute_sql_query_standalone(query=query, model=model.Notification, param={"scid" : shipcall.id})
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eligible_notifications = [notification for notification in eligible_notifications if Notifier.check_notification_exceeds_minimum_time_difference(notification, time_diff_threshold)]
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eligible_notifications = [notification for notification in eligible_notifications if Notifier.check_notification_level_matches_shipcall_entry(notification, shipcall)]
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return eligible_notifications
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@staticmethod
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def check_notification_exceeds_minimum_time_difference(notification:model.Notification, time_diff_threshold:float):
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"""
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a notification may only be sent, when the created notification has been created or modified {time_diff_threshold} seconds ago.
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"""
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assert (notification.created is not None) or (notification.modified is not None), f"must provide either 'created' or 'modified'"
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if notification.modified is not None:
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return difference_to_then(notification.modified)>time_diff_threshold
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else:
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return difference_to_then(notification.created)>time_diff_threshold
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@staticmethod
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def check_notification_level_matches_shipcall_entry(notification, shipcall):
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"""
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a notification may only be sent, when the shipcall entry matches the notification level.
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otherwise, a user may have adapted the shipcall in the mean-time, so a notification would no longer be useful.
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"""
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return int(shipcall.evaluation) == int(notification.level)
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@staticmethod
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def get_eligible_notifications(shipcalls:list[model.Shipcall], time_diff_threshold:float):
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"""obtain a list of all notifications of each element of the shipcall list."""
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eligible_notifications = []
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for shipcall in shipcalls:
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eligible_notification = Notifier.get_eligible_notifications_of_shipcall(shipcall, time_diff_threshold)
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eligible_notifications.extend(eligible_notification)
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return eligible_notifications
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@staticmethod
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def create_notifications_for_user_list(shipcall, users:list[model.User]):
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for user in users:
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notification_type_list = Notifier.build_notification_type_list(user)
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for notification_type in notification_type_list:
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schemaModel = dict(shipcall_id = shipcall.id, level = int(shipcall.evaluation), type = notification_type, message = "", created = datetime.datetime.now(), modified=None)
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query = SQLQuery.get_notifications_post(schemaModel)
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schemas = execute_sql_query_standalone(query=query, param=schemaModel, command_type="execute")
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return
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@staticmethod
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def generate_notifications(shipcall_id):
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"""
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This one-line method creates all notifications for the provided shipcall id. It does so by obtaining the shipcall,
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looking up its history, and finding all attached users.
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For each user, a notification will be created for each subscribed notification type (e.g., Email)
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"""
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# get the respective shipcall
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shipcall = Notifier.get_shipcall(shipcall_id)
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# find all attached users of the shipcall (checks the history, then reads out the user ids and builds the users)
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users = Notifier.get_users_via_history(shipcall_id=shipcall.id)
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# for each user, create one notification for each subscribed notification type (e.g., Email)
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Notifier.create_notifications_for_user_list(shipcall, users)
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return
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@staticmethod
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def create_etaetd_string(eta, etd): # #TODO_rename: function name is improvable
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eta = eta.strftime("%d.%m.%Y %H:%M") if eta is not None else None
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etd = etd.strftime("%d.%m.%Y %H:%M") if etd is not None else None
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eta_etd = ""
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if eta is not None and etd is not None:
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eta_etd = f"{eta} - {etd}"
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if eta is not None and etd is None:
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eta_etd = f"{eta}"
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if etd is None and etd is not None:
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eta_etd = f"{etd}"
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return eta_etd
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@staticmethod
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def prepare_notification_body(notification):
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# obtain the respective shipcall and ship
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shipcall = execute_sql_query_standalone(query=SQLQuery.get_shipcall_by_id(), model=model.Shipcall, param={"id" : notification.shipcall_id}, command_type="single")
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ship = execute_sql_query_standalone(query=SQLQuery.get_ship_by_id(), model=model.Ship, param={"id" : shipcall.ship_id}, command_type="single")
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# use ship & shipcall data models to prepare the body
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ship_name = ship.name
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eta_etd = Notifier.create_etaetd_string(shipcall.eta, shipcall.etd)
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eta_etd_type = eta_etd_type_dict[ShipcallType(shipcall.type)]
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evaluation_message = shipcall.evaluation_message
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return (ship_name, evaluation_message, eta_etd, eta_etd_type)
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@staticmethod
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def shipcall_put_update_evaluation_notifications_sent_flag(notification):
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# change the 'evaluation_notifications_sent' flag
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evaluation_notifications_sent = 1
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schemaModel = {"id":notification.shipcall_id, "evaluation_notifications_sent":evaluation_notifications_sent}
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query = SQLQuery.get_shipcall_put(schemaModel)
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schemas = execute_sql_query_standalone(query=query, param=schemaModel, command_type="execute")
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return
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@staticmethod
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def check_user_is_subscribed_to_notification_type(user,notification_type):
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"""given a notification, one can check, whether the current user has subscribed to the respective notification_type. Returns a boolean"""
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if int(notification_type) == int(model.NotificationType.email):
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return user.notify_email
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elif int(notification_type) == int(model.NotificationType.push):
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return user.notify_popup
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elif int(notification_type) == int(model.NotificationType.undefined):
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pass
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### placeholders:
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#elif int(notification_type) == int(model.NotificationType.whatsapp):
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#return user.notify_whatsapp
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#elif int(notification_type) == int(model.NotificationType.signal):
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#return user.notify_signal
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else: # placeholder: whatsapp/signal
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raise NotImplementedError(notification_type)
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"""# build the list of evaluation times ('now', as isoformat)"""
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#evaluation_times = [datetime.datetime.now().isoformat() for _i in range(len(evaluation_states_new))]
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@ -1,6 +1,8 @@
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import os
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import typing
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import datetime
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import smtplib
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from socket import gaierror
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from getpass import getpass
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from email.message import EmailMessage
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import mimetypes
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@ -42,7 +44,10 @@ class EmailHandler():
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self.mail_port = mail_port
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self.mail_address = mail_address
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try:
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self.server = smtplib.SMTP_SSL(self.mail_server, self.mail_port) # alternatively, use smtplib.SMTP
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except gaierror:
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raise Exception(f"'socket.gaierror' raised. This commonly happens, when there is no access to the server (e.g., by not having an internet connection)")
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def check_state(self):
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"""check, whether the server login took place and is open."""
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@ -227,3 +232,70 @@ class EmailHandler():
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if os.path.exists(temp_filename):
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os.remove(temp_filename)
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return
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import typing
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from email.mime.application import MIMEApplication
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import mimetypes
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def add_bremen_calling_logo(msg_multipart, path):
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"""
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The image is not attached automatically when it is embedded to the content. To circumvent this,
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one commonly creates attachments, which are referred to in the email content.
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The content body refers to 'LogoBremenCalling', which the 'Content-ID' of the logo is assigned as.
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"""
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with open(path, 'rb') as file:
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attachment = MIMEApplication(file.read(), _subtype=mimetypes.MimeTypes().guess_type(path), Name="bremen_calling.png")
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attachment.add_header('Content-Disposition','attachment',filename=str(os.path.basename(path)))
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attachment.add_header('Content-ID', '<LogoBremenCalling>')
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msg_multipart.attach(attachment)
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return msg_multipart
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def create_shipcall_evaluation_notification(email_handler, ship_name:str, evaluation_message:str, eta_etd_str:str, eta_etd_type:str, content:str, files:typing.Optional[list[str]]):
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"""
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email_handler : EmailHandler. Contains meta-level information about the mail server and sender's Email.
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ship_name : str. Name of the referenced ship, so the user knows the context.
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evaluation_message : str. Brief description of the current evaluation state
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eta_etd_str : str. Readable format of a datetime.datetime object, which is either ETA, ETD or both. Informs the user about when the shipcall is due.
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eta_etd_type : str. Reference to the time, whether it arrives/leaves/shifts.
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content : str (or filepath). Should refer to the template, which defines the content. This file contains HTML-structured text.
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files: (optional). List of file paths, which are included as attachments.
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"""
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subject = f"{ship_name} (vorauss. {eta_etd_type}: {eta_etd_str})"
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# create message_body
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message_body = content # "Hello World."
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evaluation_message_reformatted = evaluation_message.replace("\n", "<br>")
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adaptive_content = f'<br>Betrifft: {ship_name} ({eta_etd_str})<font size="1"><br>{evaluation_message_reformatted}</font>'
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message_body = message_body.replace("#ADAPTIVECONTENT", adaptive_content)
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msg = email_handler.create_email(subject=subject, message_body=message_body, subtype="html")
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msg_multipart = email_handler.translate_mail_to_multipart(msg=msg)
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if files is not None:
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for path in files:
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assert os.path.exists(path), f"cannot find attachment at path: {path}"
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email_handler.attach_file(path, msg=msg_multipart)
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# add the bremen calling logo, which is referred to in the email body
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msg_multipart = add_bremen_calling_logo(msg_multipart, path=os.path.join("C:/Users/User/brecal/misc/logo_bremen_calling.png"))
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return (msg_multipart,content)
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def send_notification(email_handler, email_tgts, msg, pwd, debug=False):
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email_handler.login(interactive=False, pwd=pwd)
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try:
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assert email_handler.check_login()
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if not debug:
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email_handler.send_email(msg, email_tgts)
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else:
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print(f"(send_notification INFO): debugging state. Would have sent an Email to: {email_tgts}")
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finally:
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email_handler.close()
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return
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159
src/server/BreCal/stubs/default_email_template.txt
Normal file
159
src/server/BreCal/stubs/default_email_template.txt
Normal file
@ -0,0 +1,159 @@
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<!doctype html>
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<html lang="en">
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<head>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
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<title>Simple Transactional Email</title>
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<style media="all" type="text/css">
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@media all {
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.btn-primary table td:hover {
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background-color: #ec0867 !important;
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}
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.btn-primary a:hover {
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background-color: #ec0867 !important;
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border-color: #ec0867 !important;
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}
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}
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@media only screen and (max-width: 640px) {
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.main p,
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.main td,
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.main span {
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font-size: 16px !important;
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}
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.wrapper {
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padding: 8px !important;
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}
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.content {
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padding: 0 !important;
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}
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.container {
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padding: 0 !important;
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padding-top: 8px !important;
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width: 100% !important;
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}
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.main {
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border-left-width: 0 !important;
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border-radius: 0 !important;
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border-right-width: 0 !important;
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}
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.btn table {
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max-width: 100% !important;
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width: 100% !important;
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}
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.btn a {
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font-size: 16px !important;
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max-width: 100% !important;
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width: 100% !important;
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}
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}
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@media all {
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.ExternalClass {
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width: 100%;
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}
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.ExternalClass,
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.ExternalClass p,
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.ExternalClass span,
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.ExternalClass font,
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.ExternalClass td,
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.ExternalClass div {
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line-height: 100%;
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}
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.apple-link a {
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color: inherit !important;
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font-family: inherit !important;
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font-size: inherit !important;
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font-weight: inherit !important;
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line-height: inherit !important;
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text-decoration: none !important;
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}
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#MessageViewBody a {
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color: inherit;
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text-decoration: none;
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font-size: inherit;
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font-family: inherit;
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font-weight: inherit;
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line-height: inherit;
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}
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}
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</style>
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</head>
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<body style="font-family: Helvetica, sans-serif; -webkit-font-smoothing: antialiased; font-size: 16px; line-height: 1.3; -ms-text-size-adjust: 100%; -webkit-text-size-adjust: 100%; background-color: #f4f5f6; margin: 0; padding: 0;">
|
||||
<table role="presentation" border="0" cellpadding="0" cellspacing="0" class="body" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; background-color: #f4f5f6; width: 100%;" width="100%" bgcolor="#f4f5f6">
|
||||
<tr>
|
||||
<td style="font-family: Helvetica, sans-serif; font-size: 16px; vertical-align: top;" valign="top"> </td>
|
||||
<td class="container" style="font-family: Helvetica, sans-serif; font-size: 16px; vertical-align: top; max-width: 600px; padding: 0; padding-top: 24px; width: 600px; margin: 0 auto;" width="600" valign="top">
|
||||
<div class="content" style="box-sizing: border-box; display: block; margin: 0 auto; max-width: 600px; padding: 0;">
|
||||
|
||||
<!-- START CENTERED WHITE CONTAINER -->
|
||||
<span class="preheader" style="color: transparent; display: none; height: 0; max-height: 0; max-width: 0; opacity: 0; overflow: hidden; mso-hide: all; visibility: hidden; width: 0;">Ein Schiffsanlauf benötigt Ihre Aufmerksamkeit.</span>
|
||||
<table role="presentation" border="0" cellpadding="0" cellspacing="0" class="main" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; background: #ffffff; border: 1px solid #eaebed; border-radius: 16px; width: 100%;" width="100%">
|
||||
|
||||
<!-- START MAIN CONTENT AREA -->
|
||||
<div style="text-align: center;">
|
||||
<img src="cid:LogoBremenCalling" height="100" width="100" alt="Bild kann nicht geladen werden." border="0" align="center">
|
||||
</div>
|
||||
|
||||
<tr>
|
||||
<td class="wrapper" style="font-family: Helvetica, sans-serif; font-size: 16px; vertical-align: top; box-sizing: border-box; padding: 24px;" valign="top">
|
||||
<p style="font-family: Helvetica, sans-serif; font-size: 16px; font-weight: normal; margin: 0; margin-bottom: 16px;">Ahoi,</p>
|
||||
<p style="font-family: Helvetica, sans-serif; font-size: 16px; font-weight: normal; margin: 0; margin-bottom: 16px;">ein Schiffsanlauf benötigt Ihre Aufmerksamkeit. Bei der Prüfung der Daten haben wir wahrgenommen, dass ein Problem aufgetreten sein könnte.</p>
|
||||
<table role="presentation" border="0" cellpadding="0" cellspacing="0" class="btn btn-primary" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; box-sizing: border-box; width: 100%; min-width: 100%;" width="100%">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td align="left" style="font-family: Helvetica, sans-serif; font-size: 16px; vertical-align: top; padding-bottom: 16px;" valign="top">
|
||||
<table role="presentation" border="0" cellpadding="0" cellspacing="0" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: auto;">
|
||||
<tbody>
|
||||
<tr>
|
||||
<td style="font-family: Helvetica, sans-serif; font-size: 16px; vertical-align: top; border-radius: 4px; text-align: center; background-color: #0867ec;" valign="top" align="center" bgcolor="#0867ec"> <a href="https://bsmd.de/" target="_blank" style="border: solid 2px #0867ec; border-radius: 4px; box-sizing: border-box; cursor: pointer; display: inline-block; font-size: 16px; font-weight: bold; margin: 0; padding: 12px 24px; text-decoration: none; text-transform: capitalize; background-color: #0867ec; border-color: #0867ec; color: #ffffff;">Zu Bremen Calling</a> </td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
</td>
|
||||
</tr>
|
||||
</tbody>
|
||||
</table>
|
||||
<p style="font-family: Helvetica, sans-serif; font-size: 16px; font-weight: normal; margin: 0; margin-bottom: 16px;">#ADAPTIVECONTENT</p>
|
||||
<p style="font-family: Helvetica, sans-serif; font-size: 16px; font-weight: normal; margin: 0; margin-bottom: 16px;"><br>Falls es sich hierbei um eine Fehlmeldung handelt, Verzeihung. Wir sind stets interessiert daran, die Software zu verbessern. Senden Sie uns gerne eine <a href="mailto:bsmd@bsmd.de">Email</a>.</p>
|
||||
</td>
|
||||
</tr>
|
||||
|
||||
|
||||
<!-- END MAIN CONTENT AREA -->
|
||||
</table>
|
||||
|
||||
<!-- START FOOTER -->
|
||||
<div class="footer" style="clear: both; padding-top: 24px; text-align: center; width: 100%;">
|
||||
<table role="presentation" border="0" cellpadding="0" cellspacing="0" style="border-collapse: separate; mso-table-lspace: 0pt; mso-table-rspace: 0pt; width: 100%;" width="100%">
|
||||
<tr>
|
||||
<td class="content-block" style="font-family: Helvetica, sans-serif; vertical-align: top; color: #9a9ea6; font-size: 12px; text-align: center;" valign="top" align="center">
|
||||
<span class="apple-link" style="color: #9a9ea6; font-size: 12px; text-align: center;">Bremer Schiffsmeldedienst, Kapt. P. Langbein e.K., Hafenkopf II / Überseetor 20, 28217 Bremen / Germany</span>
|
||||
<br> Sie möchten keine Benachrichtigungen mehr erhalten? <a href="mailto:bsmd@bsmd.de" style="text-decoration: underline; color: #9a9ea6; font-size: 12px; text-align: center;">Hier abmelden</a>.
|
||||
</td>
|
||||
</tr>
|
||||
<tr>
|
||||
<td class="content-block powered-by" style="font-family: Helvetica, sans-serif; vertical-align: top; color: #9a9ea6; font-size: 12px; text-align: center;" valign="top" align="center">
|
||||
Mail-Design by <a href="http://htmlemail.io" style="color: #9a9ea6; font-size:12px; text-align: center; text-decoration: none;">HTMLemail.io</a>
|
||||
</td>
|
||||
</tr>
|
||||
</table>
|
||||
</div>
|
||||
|
||||
<!-- END FOOTER -->
|
||||
|
||||
<!-- END CENTERED WHITE CONTAINER --></div>
|
||||
</td>
|
||||
<td style="font-family: Helvetica, sans-serif; font-size: 16px; vertical-align: top;" valign="top"> </td>
|
||||
</tr>
|
||||
</table>
|
||||
</body>
|
||||
</html>
|
||||
15
src/server/BreCal/stubs/email_template.py
Normal file
15
src/server/BreCal/stubs/email_template.py
Normal file
@ -0,0 +1,15 @@
|
||||
import os
|
||||
|
||||
def get_default_html_email():
|
||||
"""
|
||||
dynamically finds the 'default_email_template.txt' file within the module. It opens the file and returns the content.
|
||||
|
||||
__file__ returns to the file, where this function is stored (e.g., within BreCal.stubs.email_template)
|
||||
using the dirname refers to the directory, where __file__ is stored.
|
||||
finally, the 'default_email_template.txt' is stored within that folder
|
||||
"""
|
||||
html_filepath = os.path.join(os.path.dirname(__file__),"default_email_template.txt")
|
||||
assert os.path.exists(html_filepath), f"could not find default email template file at path: {html_filepath}"
|
||||
with open(html_filepath,"r", encoding="utf-8") as file: # encoding = "utf-8" allows for German Umlaute
|
||||
content = file.read()
|
||||
return content
|
||||
Reference in New Issue
Block a user