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58 lines
2.1 KiB
58 lines
2.1 KiB
# ADN DMR Peer Server plugin - voice-announcements talkgroup queue
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#
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# Copyright (C) 2026 Rodrigo Pérez, CE5RPY <ce5rpy@qmd.cl>
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#
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###############################################################################
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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###############################################################################
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"""One playback at a time per talkgroup; the rest wait their turn, in order."""
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from __future__ import annotations
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from typing import Generic, TypeVar
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T = TypeVar("T")
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class TalkgroupQueue(Generic[T]):
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def __init__(self) -> None:
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self._on_air: set[int] = set()
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self._waiting: list[tuple[int, T]] = []
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def on_air(self, tg: int) -> bool:
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return tg in self._on_air
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def request(self, tg: int, job: T) -> bool:
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"""True: start ``job`` now (its TG is free). False: queued behind the one on air."""
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if tg in self._on_air:
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self._waiting.append((tg, job))
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return False
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self._on_air.add(tg)
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return True
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def finished(self, tg: int) -> T | None:
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"""Free ``tg``; the next waiting job whose TG is free, now marked on air."""
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self._on_air.discard(tg)
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for i, (waiting_tg, job) in enumerate(self._waiting):
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if waiting_tg not in self._on_air:
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del self._waiting[i]
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self._on_air.add(waiting_tg)
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return job
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return None
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def __len__(self) -> int:
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return len(self._waiting)
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