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import log |
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from ._base import Service |
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from ..domain import Template, Placeholder |
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class TemplateService(Service): |
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def __init__(self, template_store, **kwargs): |
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super().__init__(**kwargs) |
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self.template_store = template_store |
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def all(self): |
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"""Get all templates.""" |
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templates = self.template_store.filter() |
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return templates |
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def find(self, key, *, allow_missing=False): |
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"""Find a template with a matching key.""" |
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# Find an exact match |
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key2 = Template.strip(key, keep_special=True) |
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template = self.template_store.read(key2) |
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if template: |
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return template |
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# Else, find an alias match |
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key2 = Template.strip(key2) |
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for template in self.all(): |
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if key2 in template.aliases_stripped: |
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return template |
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# Else, no match |
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if allow_missing: |
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return Placeholder(key) |
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raise self.exceptions.TemplateNotFound |
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def aliases(self, query=None): |
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"""Get all aliases with an optional name filter.""" |
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names = [] |
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for template in self.all(): |
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for name in [template.key] + template.aliases: |
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if query is None or query in name: |
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names.append(name) |
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return names |
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def validate(self): |
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"""Ensure all templates are valid and conflict-free.""" |
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templates = self.all() |
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keys = {template.key: template for template in templates} |
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for template in templates: |
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log.info(f"Checking template '{template}'") |
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if not template.validate(): |
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return False |
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for alias in template.aliases: |
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log.info(f"Checking alias '{alias}' -> '{template.key}'") |
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if alias not in template.aliases_lowercase: |
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msg = "Alias '%s' should be lowercase characters or dashes" |
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log.error(msg, alias) |
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return False |
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try: |
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existing = keys[alias] |
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except KeyError: |
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keys[alias] = template |
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else: |
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msg = "Alias '%s' already used in template: %s" |
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log.error(msg, alias, existing) |
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return False |
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return True |
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jacebrowning /
memegen
