| 1 | import os |
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| 2 | from exceptions import InvalidJobException, \ |
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| 3 | InvalidPrinterStateException |
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| 4 | |
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| 5 | class Job(object): |
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| 6 | |
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| 7 | def __init__(self, document=None): |
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| 8 | """Initialize a Gutenbach job. |
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| 9 | |
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| 10 | This sets the status to 'initializing' and optionally sets the |
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| 11 | document to print to the value of document. |
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| 12 | """ |
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| 13 | |
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| 14 | self._jobid = None |
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| 15 | self._status = 'initializing' |
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| 16 | self._document = document |
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| 17 | self._printer = None |
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| 18 | |
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| 19 | @property |
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| 20 | def jobid(self): |
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| 21 | return self._jobid |
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| 22 | |
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| 23 | @jobid.setter |
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| 24 | def jobid(self, val): |
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| 25 | raise AttributeError("Setting jobid is illegal!") |
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| 26 | |
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| 27 | @property |
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| 28 | def document(self): |
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| 29 | return self._document |
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| 30 | |
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| 31 | @document.setter |
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| 32 | def document(self, path): |
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| 33 | if not os.path.exists(path): |
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| 34 | raise IOError("Document '%s' does not exist!" % path) |
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| 35 | self._document = path |
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| 36 | |
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| 37 | @property |
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| 38 | def status(self): |
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| 39 | return self._status |
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| 40 | |
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| 41 | @status.setter |
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| 42 | def status(self, val): |
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| 43 | raise AttributeError( |
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| 44 | "Setting status directly is illegal! " + \ |
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| 45 | "Please use enqueue(), play(), or finish().") |
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| 46 | |
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| 47 | @property |
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| 48 | def printer(self): |
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| 49 | return self._printer |
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| 50 | |
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| 51 | @printer.setter |
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| 52 | def printer(self, val): |
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| 53 | raise AttributeError( |
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| 54 | "Setting printer directly is illegal! " + \ |
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| 55 | "Please use enqueue().") |
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| 56 | |
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| 57 | def enqueue(self, printer): |
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| 58 | if self.status != 'initializing': |
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| 59 | raise InvalidJobException( |
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| 60 | "Cannot enqueue a job that has " + \ |
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| 61 | "already been initialized!") |
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| 62 | self._printer = printer |
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| 63 | self._status = 'active' |
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| 64 | |
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| 65 | def play(self): |
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| 66 | if self.status != 'active': |
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| 67 | raise InvalidJobException( |
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| 68 | "Cannot play an inactive job!") |
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| 69 | |
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| 70 | self._status = 'playing' |
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| 71 | # TODO: add external call to music player |
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| 72 | self.printer.complete_job(self.jobid) |
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| 73 | |
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| 74 | def finished(self): |
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| 75 | self._status = 'finished' |
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| 76 | |
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| 77 | def __repr__(self): |
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| 78 | return str(self) |
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| 79 | |
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| 80 | def __str__(self): |
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| 81 | return "<Job %d>" % self.jobid |
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