from mode import Fundamental
from lex import Grammar, PatternRule, RegionRule

class MetadataGrammar(Grammar):
    rules = [PatternRule(r'username', r'[a-zA-Z0-9_]+')]

class BlameGrammar(Grammar):
    rules = [
        RegionRule(r'metadata', r'^[0-9\.]+', MetadataGrammar,
                   r'(?:\d{4}-\d{2}-\d{2}|\d{2}-[A-Z][a-z]{2}-\d{2})'),
        PatternRule(r'data', r'.+$'),
    ]

class Blame(Fundamental):
    name    = 'Blame'
    grammar = BlameGrammar
    colors  = {
        'metadata.start':    ('blue', 'default', 'bold'),
        'metadata.username': ('cyan', 'default', 'bold'),
        'metadata.end':      ('green', 'default', 'bold'),
    }

install = Blame.install