# pycmx
# (c) 2023 Jamie Hardt
from .parse_cmx_statements import (StmtEvent, StmtClipName, StmtSourceFile, StmtAudioExt, StmtUnrecognized, StmtEffectsName)
from .edit import Edit
from typing import List, Generator, Optional, Tuple, Any
[docs]
class Event:
"""
Represents a collection of :class:`~pycmx.edit.Edit` s, all with the same event number.
"""
def __init__(self, statements):
self.statements = statements
@property
def number(self) -> int:
"""
Return the event number.
"""
return int(self._edit_statements()[0].event)
@property
def edits(self) -> List[Edit]:
"""
Returns the edits. Most events will have a single edit, a single event
will have multiple edits when a dissolve, wipe or key transition needs
to be performed.
"""
edits_audio = list( self._statements_with_audio_ext() )
clip_names = self._clip_name_statements()
source_files= self._source_file_statements()
the_zip: List[List[Any]] = [edits_audio]
if len(edits_audio) == 2:
start_name: Optional[StmtClipName] = None
end_name: Optional[StmtClipName] = None
for clip_name in clip_names:
if clip_name.affect == 'from':
start_name = clip_name
elif clip_name.affect == 'to':
end_name = clip_name
the_zip.append([start_name, end_name])
else:
if len(edits_audio) == len(clip_names):
the_zip.append(clip_names)
else:
the_zip.append([None] * len(edits_audio) )
if len(edits_audio) == len(source_files):
the_zip.append(source_files)
elif len(source_files) == 1:
the_zip.append( source_files * len(edits_audio) )
else:
the_zip.append([None] * len(edits_audio) )
# attach trans name to last event
try:
trans_statement = self._trans_name_statements()[0]
trans_names: List[Optional[Any]] = [None] * (len(edits_audio) - 1)
trans_names.append(trans_statement)
the_zip.append(trans_names)
except IndexError:
the_zip.append([None] * len(edits_audio) )
return [ Edit(edit_statement=e1[0],
audio_ext_statement=e1[1],
clip_name_statement=n1,
source_file_statement=s1,
trans_name_statement=u1) for (e1,n1,s1,u1) in zip(*the_zip) ]
@property
def unrecognized_statements(self) -> Generator[StmtUnrecognized, None, None]:
"""
A generator for all the unrecognized statements in the event.
"""
for s in self.statements:
if type(s) is StmtUnrecognized:
yield s
def _trans_name_statements(self) -> List[StmtEffectsName]:
return [s for s in self.statements if type(s) is StmtEffectsName]
def _edit_statements(self) -> List[StmtEvent]:
return [s for s in self.statements if type(s) is StmtEvent]
def _clip_name_statements(self) -> List[StmtClipName]:
return [s for s in self.statements if type(s) is StmtClipName]
def _source_file_statements(self) -> List[StmtSourceFile]:
return [s for s in self.statements if type(s) is StmtSourceFile]
def _statements_with_audio_ext(self) -> Generator[Tuple[StmtEvent, Optional[StmtAudioExt]], None, None]:
for (s1, s2) in zip(self.statements, self.statements[1:]):
if type(s1) is StmtEvent and type(s2) is StmtAudioExt:
yield (s1,s2)
elif type(s1) is StmtEvent:
yield (s1, None)