#!/usr/bin/python

author_keys = [ 'name', 'student', 'inst', 'advisor' ]
record_keys = [ 'title', 'issue', 'date', 'pages', 'andree' ]
key_names = { 'issue':'Issue', 'date':'Date',\
	'title':'Title', 'pages':'Pages', 'andree':'Andree Award',\
	'name':'Author', 'student':'Student', 'inst':'School',\
	'advisor':'Advisor' }

class Records:
	def __init__(self):
		self.file = open("data")
		self.known = None
		self.issue = "Unknown"
		self.date = "Unknown"
		self.count = 0

	def hasNext(self):
		if self.known is None:
			self.readNext()
		return self.known

	def next(self):
		if self.known is None:
			self.readNext()
		ret = self.known
		self.known = None
		return ret

	def readNext(self):
		if self.file is None:
			return
		rec = { 'authors':[], 'id':self.count, \
			'issue':self.issue, 'date':self.date }
		self.count = self.count + 1
		author = None
		while 1==1:
			linePos = self.file.tell()
			line = self.file.readline()
			if line == "":
				self.file.close()
				self.file = None
				if 'title' in rec:
					self.known = None
				else:
					self.known = rec
					self.issue = rec['issue']
					self.date = rec['date']
				return
			if line[0:6] in [ 'issue ', 'title '] and 'title' in rec:
				self.file.seek(linePos)
				self.known = rec
				self.issue = rec['issue']
				self.date = rec['date']
				return

			if line[0] <> '#':
				index = line.find(' ')
				if index >= 0:
					key = line[0:index]
					val = line[index + 1:].strip()
					if key == 'name':
						author = { 'name':val }
						rec['authors'].append(author)
					elif key in author_keys:
						if author is None:
							print "Error: Author has attribute before name"
						else:
							author[key] = val
					else:
						rec[key] = val

def search(key, value):
	recs = Records()
	result = []
	value = value.upper()
	if key in author_keys:
		while recs.hasNext():
			rec = recs.next()
			add = 0==1
			for author in rec['authors']:
				if key in author and author[key].upper().find(value) >= 0:
					add = 1==1
			if add:
				result.append(rec)
	else:
		while recs.hasNext():
			rec = recs.next()
			if key in rec and rec[key].upper().find(value) >= 0:
				result.append(rec)
	return result