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Engine for LaTeX songbooks
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140 lines
4.1 KiB
140 lines
4.1 KiB
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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def split_author_names(string):
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"""Split author between first and last name.
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The last space separates first and last name, but spaces following a
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backslash or a command are not separators.
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Examples:
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- Edgar Allan Poe => Poe, Edgar Allan
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- Edgar Allan \emph {Poe} => \emph {Poe}, Edgar Allan
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- The Rolling\ Stones => Rolling\ Stones, The
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- The {Rolling Stones} => {Rolling Stones}, The
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"""
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ignore_space = False
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last_space = index = 0
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brace_count = 0
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for char in string:
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index += 1
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if brace_count == 0:
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if char == "\\":
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ignore_space = True
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elif not char.isalnum() and ignore_space:
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ignore_space = False
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elif char == " ":
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last_space = index
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if char == "}":
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brace_count += 1
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if char == "{":
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brace_count -= 1
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return string[:last_space], string[last_space:]
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def split_sep_author(string, sep):
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authors = []
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match = sep.match(string)
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while match:
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authors.append(match.group(2))
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string = match.group(1)
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match = sep.match(string)
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authors.append(string)
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return authors
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def processauthors(authors_string, after=[], ignore=[], sep=[]):
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"""Return a list of authors
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For example, we are processing:
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# processauthors(
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# "Lyrics by William Blake (from Milton, 1808),
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music by Hubert Parry (1916),
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and sung by The Royal\ Choir~of~Nowhere
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(just here to show you how processing is done)",
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# after = ["by"],
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# ignore = ["anonymous"],
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# sep = ["and"]
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# )
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The "authors_string" string is processed as:
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1) First, parenthesis (and its content) are removed.
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# "Lyrics by William Blake, music by Hubert Parry,
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and sung by The Royal\ Choir~of~Nowhere"
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2) String is split, separators being comma and words from "sep".
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# ["Lyrics by William Blake", "music by Hubert Parry",
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"sung by The Royal\ Choir~of~Nowhere"]
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3) Everything before words in "after" is removed.
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# ["William Blake", "Hubert Parry", "The Royal\ Choir~of~Nowhere"]
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4) Strings containing words of "ignore" are dropped.
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# ["William Blake", "Hubert Parry", The Royal\ Choir~of~Nowhere"]
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5) First names are moved after last names
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# ["Blake, William", "Parry, Hubert", Royal\ Choir~of~Nowhere, The"]
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"""
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# Removing parentheses
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opening = 0
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dest = ""
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for char in authors_string:
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if char == '(':
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opening += 1
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elif char == ')' and opening > 0:
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opening -= 1
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elif opening == 0:
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dest += char
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authors_string = dest
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# Splitting strings
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authors_list = [authors_string]
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for sepword in sep:
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dest = []
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for author in authors_list:
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dest.extend(split_sep_author(author, sepword))
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authors_list = dest
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# Removing stuff before "after"
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dest = []
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for author in authors_list:
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for afterword in after:
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match = afterword.match(author)
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if match:
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author = match.group(1)
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break
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dest.append(author)
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authors_list = dest
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# Ignoring ignored authors
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dest = []
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for author in authors_list:
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ignored = False
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for ignoreword in ignore:
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if author.find(str(ignoreword)) != -1:
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ignored = True
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break
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if not ignored:
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dest.append(author)
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authors_list = dest
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# Cleaning: removing empty authors and unnecessary spaces
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authors_list = [author.lstrip()
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for author in authors_list if author.lstrip()]
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# Moving first names after last names
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dest = []
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for author in authors_list:
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first, last = split_author_names(author)
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if first:
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dest.append("%(last)s, %(first)s" % {
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'first': first.lstrip(),
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'last': last.lstrip(),
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})
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else:
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dest.append(last.lstrip())
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authors_list = dest
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return authors_list
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