#!/usr/bin/env python

#

# hgweb.py - 0.2 - 21 May 2005 - (c) 2005 Jake Edge <jake@edge2.net>

#    - web interface to a mercurial repository

#

# This software may be used and distributed according to the terms

# of the GNU General Public License, incorporated herein by reference.

# useful for debugging

import cgitb

cgitb.enable()

import os, cgi, time, re, difflib, sys, zlib

from mercurial import hg, mdiff

def nl2br(text):

    return re.sub('\n', '<br />', text)

def obfuscate(text):

    l = []

    for c in text:

        l.append('&#%d;' % ord(c))

    return ''.join(l)

def httphdr(type):

    print 'Content-type: %s\n' % type

class page:

            charset="ISO-8859-1"):

        print 'Content-type: %s; charset=%s\n' % (type, charset)

    def endpage(self):

        print '</BODY>'

        print '</HTML>'

    def show_diff(self, a, b, fn):

        a = a.splitlines(1)

        b = b.splitlines(1)

        l = difflib.unified_diff(a, b, fn, fn)

        print '<pre>'

        for line in l:

            line = cgi.escape(line[:-1])

            if line.startswith('+'):

                print '<span class="plusline">%s</span>' % (line, )

            elif line.startswith('-'):

                print '<span class="minusline">%s</span>' % (line, )

            elif line.startswith('@'):

                print '<span class="atline">%s</span>' % (line, )

            else:

                print line

        print '</pre>'

class errpage(page):

    def __init__(self):

        page.__init__(self, title="Mercurial Web Error Page")

class change_list(page):

        self.repo = repo

    def content(self, hi=None):

        cl = []

        count = self.repo.changelog.count()

        if not hi:

            hi = count

        elif hi < self.numchanges:

            hi = self.numchanges

        start = 0

        if hi - self.numchanges >= 0:

            start = hi - self.numchanges

        nav = "Displaying Revisions: %d-%d" % (start, hi-1)

        if start != 0:

            nav = ('<a href="?cmd=changes;hi=%d">Previous %d</a>&nbsp;&nbsp;' \

                    % (start, self.numchanges)) + nav

        if hi != count:

            if hi + self.numchanges <= count:

                nav += '&nbsp;&nbsp;<a href="?cmd=changes;hi=%d">Next %d</a>' \

                        % (hi + self.numchanges, self.numchanges)

            else:

                nav += '&nbsp;&nbsp;<a href="?cmd=changes">Next %d</a>' % \

                        self.numchanges

        print '<center>%s</center>' % nav

        for i in xrange(start, hi):

            n = self.repo.changelog.node(i)

            cl.append((n, self.repo.changelog.read(n)))

        cl.reverse()

        print '<table summary="" width="100%" align="center">'

        for n, ch in cl:

            print '<tr><td>'

            self.change_table(n, ch)

            print '</td></tr>'

        print '</table>'

        print '<center>%s</center>' % nav

    def change_table(self, nodeid, changes):

        hn = hg.hex(nodeid)

        i = self.repo.changelog.rev(nodeid)

        (h1, h2) = [ hg.hex(x) for x in self.repo.changelog.parents(nodeid) ]

        datestr = time.asctime(time.gmtime(float(changes[2].split(' ')[0])))

        for f in changes[3]:

class checkin(page):

        self.repo = repo

        self.node = hg.bin(nodestr)

        self.nodestr = nodestr

        print '<h3>Checkin: %s</h3>' % nodestr

    def content(self):

        changes = self.repo.changelog.read(self.node)

        i = self.repo.changelog.rev(self.node)

        parents = self.repo.changelog.parents(self.node)

        (h1, h2) = [ hg.hex(x) for x in parents ]

        (i1, i2) = [ self.repo.changelog.rev(x) for x in parents ]

        datestr = time.asctime(time.gmtime(float(changes[2].split(' ')[0])))

        mf = self.repo.manifest.read(changes[0])

        if i2 != -1:

        (c, a, d) = self.repo.diffrevs(parents[0], self.node)

        change = self.repo.changelog.read(parents[0])

        mf2 = self.repo.manifest.read(change[0])

        for f in c:

            self.show_diff(self.repo.file(f).read(mf2[f]), \

                    self.repo.file(f).read(mf[f]), f)

        for f in a:

            self.show_diff('', self.repo.file(f).read(mf[f]), f)

        for f in d:

            self.show_diff(self.repo.file(f).read(mf2[f]), '', f)

class filepage(page):

        self.repo = repo

        self.fn = fn

        if cs: 

            chng = self.repo.changelog.read(hg.bin(cs))

            mf = self.repo.manifest.read(chng[0])

            self.node = mf[self.fn]

            self.nodestr = hg.hex(self.node)

        else:

            self.nodestr = node

            self.node = hg.bin(node)

        print '<div class="filename">%s (%s)</div>' % \

                (cgi.escape(self.fn), self.nodestr, )

        print '<a href="?cmd=hist;fn=%s">history</a><br />' % self.fn

    def content(self):

        print '<pre>'

        print cgi.escape(self.repo.file(self.fn).read(self.node))

        print '</pre>'

class mfpage(page):

        self.repo = repo

        self.nodestr = node

        self.node = hg.bin(node)

    def content(self):

        mf = self.repo.manifest.read(self.node)

        fns = mf.keys()

        fns.sort()

        for f in fns:

class histpage(page):

        self.repo = repo

        self.fn = fn

    def content(self):

        print '<div class="filehist">File History: %s</div>' % self.fn

        r = self.repo.file(self.fn)

        print '<br />'

        print '<table summary="" width="100%" align="center">'

        for i in xrange(r.count()-1, -1, -1):

            print '<tr><td>'

            print '</tr></td>'

        print '</table>'

        datestr = time.asctime(time.gmtime(float(changes[2].split(' ')[0])))

class hgweb:

    repo_path = "."

    numchanges = 50

    def __init__(self):

        pass

    def run(self):

        args = cgi.parse()

        ui = hg.ui()

        repo = hg.repository(ui, self.repo_path)

        if not args.has_key('cmd') or args['cmd'][0] == 'changes':

            hi = args.get('hi', ( repo.changelog.count(), ))

            page.content(hi = int(hi[0]))

            page.endpage()

        elif args['cmd'][0] == 'chkin':

            if not args.has_key('nd'):

                page = errpage()

                print '<div class="errmsg">No Node!</div>'

            else:

                page.content()

            page.endpage()

        elif args['cmd'][0] == 'file':

            if not (args.has_key('nd') and args.has_key('fn')) and \

                    not (args.has_key('cs') and args.has_key('fn')):

                page = errpage()

                print '<div class="errmsg">Invalid Args!</div>'

            else:

                if args.has_key('nd'):

                else:

                page.content()

            page.endpage()

        elif args['cmd'][0] == 'mf':

            if not args.has_key('nd'):

                page = errpage()

                print '<div class="errmsg">No Node!</div>'

            else:

                page.content()

            page.endpage()

        elif args['cmd'][0] == 'hist':

            if not args.has_key('fn'):

                page = errpage()

                print '<div class="errmsg">No Filename!</div>'

            else:

                page.content()

            page.endpage()

        elif args['cmd'][0] == 'branches':

            httphdr("text/plain")

            nodes = []

            if args.has_key('nodes'):

                nodes = map(hg.bin, args['nodes'][0].split(" "))

            for b in repo.branches(nodes):

                print " ".join(map(hg.hex, b))

        elif args['cmd'][0] == 'between':

            httphdr("text/plain")

            nodes = []

            if args.has_key('pairs'):

                pairs = [ map(hg.bin, p.split("-"))

                          for p in args['pairs'][0].split(" ") ]

            for b in repo.between(pairs):

                print " ".join(map(hg.hex, b))

        elif args['cmd'][0] == 'changegroup':

            httphdr("application/hg-changegroup")

            nodes = []

            if args.has_key('roots'):

                nodes = map(hg.bin, args['roots'][0].split(" "))

            z = zlib.compressobj()

            for chunk in repo.changegroup(nodes):

                sys.stdout.write(z.compress(chunk))

            sys.stdout.write(z.flush())

        else:

            page = errpage()

            print '<div class="errmsg">unknown command: %s</div>' % \

                    cgi.escape(args['cmd'][0])

            page.endpage()

if __name__ == "__main__":

    hgweb().run()