34 lines
1003 B
Python
34 lines
1003 B
Python
from copy import copy
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class Visitable:
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default_scripts = dict()
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def __init__(self, *visitors, **scripts):
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self.visitors = list(visitors)
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self.scripts = scripts or {
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k: v(self) for k, v in self.default_scripts.items()
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}
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def script(self, name):
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script = copy(self.scripts[name])
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for prefix in ('init_', 'pre_', '', 'post_'):
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method = prefix + name
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for visitor in self.visitors:
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if hasattr(visitor, method):
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script.append(f'echo "{type(visitor).__name__}.{method}"')
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getattr(visitor, method)(script)
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return script
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def visitor(self, name):
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for visitor in self.visitors:
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if name.lower() == type(visitor).__name__.lower():
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return visitor
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def variable(self, name):
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for visitor in self.visitors:
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if getattr(visitor, name, None) is not None:
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return getattr(visitor, name)
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