#!/usr/bin/python

from dt_ParseArgs import parse_args, NO_ARGS
from dt_StructuredDoc import StructuredDoc
from dt_FilePath import canonical, strip_filename, relative_to

import posix, sys, copy

ops, args=parse_args(
    [(['h', 'help'], NO_ARGS, 'display this help and exit'),
     (['version'], NO_ARGS, 'output version information and exit'),
     (['r', 'site-root', 'root'], posix.getcwd(), 
      ('ROOT', 'The root of the web pages (default=current directory)')),
     (['drop-unused'], NO_ARGS, 
      'do not saved unused editable regions (default=do save)'),
     (['s', 'to-stdout'], NO_ARGS,
      'write to stdout (default=overwrite file)'),
     (['suffix'], "", ('SUFFIX', 'write modified file with SUFFIX (default=no suffix')),
     (['w', '--warn-unused'], NO_ARGS, 
      'warn if editable fields are not used (default=no warning)')],
    name='dt-apply',
    usage='Usage: dt-apply [OPTION] TEMPLATE CONTENT ...',
    description='Apply TEMPLATE to CONTENT',
    version='0.0.1')

if len(args)<2:
    sys.stderr.write('dt-apply: must give at least two arguments (TEMPLATE and CONTENT)\n')
    sys.stderr.write("Try `dt-apply --help' for more information\n")
    sys.exit(1)

template_filename=args[0]
content_filename_list=args[1:]
site_root=ops['r']

template_path=canonical(strip_filename(template_filename))
try:
    template=StructuredDoc(from_file=template_filename)
except IOError:
    sys.stdout.write("error: cannot open template \"%s\"\n"
		     % template_filename)
    sys.exit(1)
template.filename="/"+relative_to(canonical(template_filename), site_root)

for content_filename in content_filename_list:
    local_template=copy.deepcopy(template)
    content_path=canonical(strip_filename(content_filename))
    local_template.redirect_links(template_path, content_path)

    try:
	s=StructuredDoc(from_file=content_filename)
    except IOError:
	sys.stdout.write("error: cannot open file \"%s\"\n"
			 % content_filename)
	sys.exit(1)
    s_new=local_template.insert(s)
    if ops.has_key('drop-unused'):
	s_new.unused=[]
    if ops.has_key('w') and s_new.unused:
	for f in s_new.unused:
	    sys.stdout.write("warning: %s: field not used: \"%s\"\n"
			     % (content_filename, f[0]))
    if ops.has_key('s'):
	out_file=sys.stdout
    else:
	out_file=open(content_filename+ops['suffix'], "w")
    out_file.write(str(s_new))
    if not ops.has_key('s'):
	out_file.close()