| 1 | import alsaaudio as aa |
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| 2 | import gutenbach.ipp |
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| 3 | from gutenbach.ipp.attribute import Attribute |
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| 4 | from .exceptions import InvalidJobException, \ |
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| 5 | InvalidPrinterStateException |
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| 6 | |
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| 7 | class Printer(object): |
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| 8 | |
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| 9 | def __init__(self, name, card, mixer): |
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| 10 | |
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| 11 | self.name = name |
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| 12 | |
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| 13 | if card >= len(aa.cards()): |
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| 14 | raise aa.ALSAAudioError( |
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| 15 | "Audio card at index %d does not exist!" % card) |
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| 16 | elif mixer not in aa.mixers(card): |
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| 17 | raise aa.ALSAAudioError( |
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| 18 | "Audio mixer '%s' does not exist!" % mixer) |
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| 19 | |
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| 20 | self.card = card |
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| 21 | self.mixer = mixer |
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| 22 | |
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| 23 | self.finished_jobs = [] |
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| 24 | self.active_jobs = [] |
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| 25 | self.jobs = {} |
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| 26 | |
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| 27 | self._next_jobid = -1 |
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| 28 | |
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| 29 | @property |
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| 30 | def next_jobid(self): |
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| 31 | self._next_jobid += 1 |
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| 32 | return self._next_jobid |
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| 33 | |
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| 34 | @next_jobid.setter |
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| 35 | def next_jobid(self, val): |
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| 36 | raise AttributeError("Setting next_jobid is illegal!") |
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| 37 | |
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| 38 | def print_job(self, job): |
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| 39 | jobid = self.next_jobid |
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| 40 | self.active_jobs.append(jobid) |
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| 41 | self.jobs[jobid] = job |
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| 42 | job.jobid = jobid |
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| 43 | job.enqueue(self) |
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| 44 | return jobid |
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| 45 | |
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| 46 | def complete_job(self, jobid): |
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| 47 | job = self.active_jobs.pop(0) |
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| 48 | if job.jobid != jobid: |
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| 49 | raise InvalidJobException( |
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| 50 | "Completed job %d has unexpected job id %d!" % \ |
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| 51 | (job.jobid, jobid)) |
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| 52 | |
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| 53 | self.finished_jobs.append(job) |
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| 54 | job.finish() |
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| 55 | return job.jobid |
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| 56 | |
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| 57 | def start_job(self, jobid): |
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| 58 | job = self.active_jobs[0] |
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| 59 | if job.jobid != jobid: |
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| 60 | raise InvalidJobException( |
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| 61 | "Completed job %d has unexpected job id %d!" % \ |
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| 62 | (job.jobid, jobid)) |
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| 63 | |
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| 64 | if job.status == 'playing': |
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| 65 | raise InvalidPrinterStateException( |
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| 66 | "Next job in queue (id %d) is " + \ |
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| 67 | "already playing!" % jobid) |
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| 68 | |
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| 69 | job.play() |
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| 70 | |
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| 71 | def get_job(self, jobid): |
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| 72 | if jobid not in self.jobs: |
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| 73 | raise InvalidJobException(jobid) |
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| 74 | return self.jobs[jobid] |
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| 75 | |
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| 76 | def __repr__(self): |
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| 77 | return str(self) |
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| 78 | |
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| 79 | def __str__(self): |
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| 80 | return "<Printer '%s'>" % self.name |
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