76 lines
2.2 KiB
Python
76 lines
2.2 KiB
Python
"""Service for managing list positioning and reordering"""
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from app import db
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from app.models import List
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class ListPositionService:
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"""Service for handling list position management"""
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@staticmethod
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def reorder_lists(board_id: int, moved_list_id: int, new_position: float) -> None:
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"""
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Reorder all lists in a board when one list is moved to a new position.
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Args:
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board_id: The ID of board containing lists
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moved_list_id: The ID of list being moved
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new_position: The new position for moved list
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"""
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# Get all lists in board, ordered by their current position
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all_lists = List.query.filter_by(board_id=board_id).order_by(List.pos).all()
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# Find moved list in board
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moved_list = None
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other_lists = []
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for lst in all_lists:
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if lst.id == moved_list_id:
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moved_list = lst
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else:
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other_lists.append(lst)
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if not moved_list:
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return # List not found in this board
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# Insert moved list at the new position
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other_lists.insert(int(new_position), moved_list)
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# Update positions for all lists to ensure unique, sequential positions
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for index, lst in enumerate(other_lists):
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lst.pos = float(index)
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db.session.commit()
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@staticmethod
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def get_next_position(board_id: int) -> float:
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"""
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Get next available position in a board.
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Args:
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board_id: The ID of board
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Returns:
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The next available position (float)
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"""
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last_list = (
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List.query.filter_by(board_id=board_id).order_by(List.pos.desc()).first()
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)
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return float(last_list.pos + 1) if last_list else 0.0
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@staticmethod
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def ensure_unique_positions(board_id: int) -> None:
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"""
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Ensure all lists in a board have unique, sequential positions.
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Useful for data cleanup.
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Args:
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board_id: The ID of board to fix
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"""
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lists = List.query.filter_by(board_id=board_id).order_by(List.pos).all()
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for index, lst in enumerate(lists):
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lst.pos = float(index)
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db.session.commit()
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