# -*- coding: utf-8 -*-

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""

Helper functions

Consists of functions to typically be used within templates, but also

available to Controllers. This module is available to both as 'h'.

"""

import hashlib

import json

import StringIO

import logging

import re

import urlparse

import textwrap

from beaker.cache import cache_region

from pygments.formatters.html import HtmlFormatter

from pygments import highlight as code_highlight

from tg.i18n import ugettext as _

from webhelpers.html import literal, HTML, escape

from webhelpers.html.tags import checkbox, end_form, hidden, link_to, \

    select, submit, text, password, textarea, radio, form as insecure_form

from webhelpers.number import format_byte_size

from webhelpers.pylonslib import Flash as _Flash

from webhelpers.pylonslib.secure_form import secure_form, authentication_token

from webhelpers.text import chop_at, truncate, wrap_paragraphs

from webhelpers.html.tags import _set_input_attrs, _set_id_attr, \

    convert_boolean_attrs, NotGiven, _make_safe_id_component

from kallithea.config.routing import url

from kallithea.lib.annotate import annotate_highlight

from kallithea.lib.pygmentsutils import get_custom_lexer

from kallithea.lib.utils2 import str2bool, safe_unicode, safe_str, \

    time_to_datetime, AttributeDict, safe_int, MENTIONS_REGEX

from kallithea.lib.markup_renderer import url_re

from kallithea.lib.vcs.exceptions import ChangesetDoesNotExistError

from kallithea.lib.vcs.backends.base import BaseChangeset, EmptyChangeset

log = logging.getLogger(__name__)

def canonical_url(*args, **kargs):

    '''Like url(x, qualified=True), but returns url that not only is qualified

    but also canonical, as configured in canonical_url'''

    from kallithea import CONFIG

    try:

        parts = CONFIG.get('canonical_url', '').split('://', 1)

        kargs['host'] = parts[1].split('/', 1)[0]

        kargs['protocol'] = parts[0]

    except IndexError:

        kargs['qualified'] = True

    return url(*args, **kargs)

def canonical_hostname():

    '''Return canonical hostname of system'''

    from kallithea import CONFIG

    try:

        parts = CONFIG.get('canonical_url', '').split('://', 1)

        return parts[1].split('/', 1)[0]

    except IndexError:

        parts = url('home', qualified=True).split('://', 1)

        return parts[1].split('/', 1)[0]

def html_escape(s):

    """Return string with all html escaped.

    This is also safe for javascript in html but not necessarily correct.

    """

    return (s

        .replace('&', '&')

        .replace(">", ">")

        .replace("<", "&lt;")

        .replace('"', """)

        )

def js(value):

    """Convert Python value to the corresponding JavaScript representation.

    This is necessary to safely insert arbitrary values into HTML <script>

    sections e.g. using Mako template expression substitution.

    Note: Rather than using this function, it's preferable to avoid the

    insertion of values into HTML <script> sections altogether. Instead,

    data should (to the extent possible) be passed to JavaScript using

    data attributes or AJAX calls, eliminating the need for JS specific

    escaping.

    Note: This is not safe for use in attributes (e.g. onclick), because

    quotes are not escaped.

    Because the rules for parsing <script> varies between XHTML (where

    normal rules apply for any special characters) and HTML (where

    entities are not interpreted, but the literal string "</script>"

    is forbidden), the function ensures that the result never contains

    '&', '<' and '>', thus making it safe in both those contexts (but

    not in attributes).

    """

    return literal(

        ('(' + json.dumps(value) + ')')

        # In JSON, the following can only appear in string literals.

        .replace('&', r'\x26')

        .replace('<', r'\x3c')

        .replace('>', r'\x3e')

    )

def jshtml(val):

    """HTML escapes a string value, then converts the resulting string

    to its corresponding JavaScript representation (see `js`).

    This is used when a plain-text string (possibly containing special

    HTML characters) will be used by a script in an HTML context (e.g.

    element.innerHTML or jQuery's 'html' method).

    If in doubt, err on the side of using `jshtml` over `js`, since it's

    better to escape too much than too little.

    """

    return js(escape(val))

def shorter(s, size=20, firstline=False, postfix='...'):

    """Truncate s to size, including the postfix string if truncating.

    If firstline, truncate at newline.

    """

    if firstline:

        s = s.split('\n', 1)[0].rstrip()

    if len(s) > size:

        return s[:size - len(postfix)] + postfix

    return s

def _reset(name, value=None, id=NotGiven, type="reset", **attrs):

    """

    Reset button

    """

    _set_input_attrs(attrs, type, name, value)

    _set_id_attr(attrs, id, name)

    convert_boolean_attrs(attrs, ["disabled"])

    return HTML.input(**attrs)

reset = _reset

safeid = _make_safe_id_component

def FID(raw_id, path):

    """

    Creates a unique ID for filenode based on it's hash of path and revision

    it's safe to use in urls

    :param raw_id:

    :param path:

    """

    return 'C-%s-%s' % (short_id(raw_id), hashlib.md5(safe_str(path)).hexdigest()[:12])

class _FilesBreadCrumbs(object):

    def __call__(self, repo_name, rev, paths):

        if isinstance(paths, str):

            paths = safe_unicode(paths)

        url_l = [link_to(repo_name, url('files_home',

                                        repo_name=repo_name,

                                        revision=rev, f_path=''),

                         class_='ypjax-link')]

        paths_l = paths.split('/')

        for cnt, p in enumerate(paths_l):

            if p != '':

                url_l.append(link_to(p,

                                     url('files_home',

                                         repo_name=repo_name,

                                         revision=rev,

                                         f_path='/'.join(paths_l[:cnt + 1])

                                         ),

                                     class_='ypjax-link'

                                     )

                             )

        return literal('/'.join(url_l))

files_breadcrumbs = _FilesBreadCrumbs()

class CodeHtmlFormatter(HtmlFormatter):

    """

    My code Html Formatter for source codes

    """

    def wrap(self, source, outfile):

        return self._wrap_div(self._wrap_pre(self._wrap_code(source)))

    def _wrap_code(self, source):

        for cnt, it in enumerate(source):

            i, t = it

            t = '<span id="L%s">%s</span>' % (cnt + 1, t)

            yield i, t

    def _wrap_tablelinenos(self, inner):

        dummyoutfile = StringIO.StringIO()

        lncount = 0

        for t, line in inner:

            if t:

                lncount += 1

            dummyoutfile.write(line)

        fl = self.linenostart

        mw = len(str(lncount + fl - 1))

        sp = self.linenospecial

        st = self.linenostep

        la = self.lineanchors

        aln = self.anchorlinenos

        nocls = self.noclasses

        if sp:

            lines = []

            for i in range(fl, fl + lncount):

                if i % st == 0:

                    if i % sp == 0:

                        if aln:

                            lines.append('<a href="#%s%d" class="special">%*d</a>' %

                                         (la, i, mw, i))

                        else:

                            lines.append('<span class="special">%*d</span>' % (mw, i))

                    else:

                        if aln:

                            lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))

                        else:

                            lines.append('%*d' % (mw, i))

                else:

                    lines.append('')

            ls = '\n'.join(lines)

        else:

            lines = []

            for i in range(fl, fl + lncount):

                if i % st == 0:

                    if aln:

                        lines.append('<a href="#%s%d">%*d</a>' % (la, i, mw, i))

                    else:

                        lines.append('%*d' % (mw, i))

                else:

                    lines.append('')

            ls = '\n'.join(lines)

        # in case you wonder about the seemingly redundant <div> here: since the

        # content in the other cell also is wrapped in a div, some browsers in

        # some configurations seem to mess up the formatting...

        if nocls:

            yield 0, ('<table class="%stable">' % self.cssclass +

                      '<tr><td><div class="linenodiv">'

                      '<pre>' + ls + '</pre></div></td>'

                      '<td id="hlcode" class="code">')

        else:

            yield 0, ('<table class="%stable">' % self.cssclass +

                      '<tr><td class="linenos"><div class="linenodiv">'

                      '<pre>' + ls + '</pre></div></td>'

                      '<td id="hlcode" class="code">')

        yield 0, dummyoutfile.getvalue()

        yield 0, '</td></tr></table>'

_whitespace_re = re.compile(r'(\t)|( )(?=\n|</div>)')

def _markup_whitespace(m):

    groups = m.groups()

    if groups[0]:

        return '<u>\t</u>'

    if groups[1]:

        return ' <i></i>'

def markup_whitespace(s):

    return _whitespace_re.sub(_markup_whitespace, s)

def pygmentize(filenode, **kwargs):

    """

    pygmentize function using pygments

    :param filenode:

    """

    lexer = get_custom_lexer(filenode.extension) or filenode.lexer

    return literal(markup_whitespace(

        code_highlight(filenode.content, lexer, CodeHtmlFormatter(**kwargs))))

def pygmentize_annotation(repo_name, filenode, **kwargs):

    """

    pygmentize function for annotation

    :param filenode:

    """

    color_dict = {}

    def gen_color(n=10000):

        """generator for getting n of evenly distributed colors using

        hsv color and golden ratio. It always return same order of colors

        :returns: RGB tuple

        """

        def hsv_to_rgb(h, s, v):

            if s == 0.0:

                return v, v, v

            i = int(h * 6.0)  # XXX assume int() truncates!

            f = (h * 6.0) - i

            p = v * (1.0 - s)

            q = v * (1.0 - s * f)

            t = v * (1.0 - s * (1.0 - f))

            i = i % 6

            if i == 0:

                return v, t, p

            if i == 1:

                return q, v, p

            if i == 2:

                return p, v, t

            if i == 3:

                return p, q, v

            if i == 4:

                return t, p, v

            if i == 5:

                return v, p, q

        golden_ratio = 0.618033988749895

        h = 0.22717784590367374

        for _unused in xrange(n):

            h += golden_ratio

            h %= 1

            HSV_tuple = [h, 0.95, 0.95]

            RGB_tuple = hsv_to_rgb(*HSV_tuple)

            yield map(lambda x: str(int(x * 256)), RGB_tuple)

    cgenerator = gen_color()

    def get_color_string(cs):

        if cs in color_dict:

            col = color_dict[cs]

        else:

            col = color_dict[cs] = cgenerator.next()

        return "color: rgb(%s)! important;" % (', '.join(col))

    def url_func(repo_name):

        def _url_func(changeset):

            author = escape(changeset.author)

            date = changeset.date

            message = escape(changeset.message)

            tooltip_html = ("<b>Author:</b> %s<br/>"

                            "<b>Date:</b> %s</b><br/>"

                            "<b>Message:</b> %s") % (author, date, message)

            lnk_format = show_id(changeset)

            uri = link_to(

                    lnk_format,

                    url('changeset_home', repo_name=repo_name,

                        revision=changeset.raw_id),

                    style=get_color_string(changeset.raw_id),

                    **{'data-toggle': 'popover',

                       'data-content': tooltip_html}

                  )

            uri += '\n'

            return uri

        return _url_func

    return literal(markup_whitespace(annotate_highlight(filenode, url_func(repo_name), **kwargs)))

class _Message(object):

    """A message returned by ``Flash.pop_messages()``.

    Converting the message to a string returns the message text. Instances

    also have the following attributes:

    * ``message``: the message text.

    * ``category``: the category specified when the message was created.

    """

    def __init__(self, category, message):

        self.category = category

        self.message = message

    def __str__(self):

        return self.message

    __unicode__ = __str__

    def __html__(self):

        return escape(safe_unicode(self.message))

class Flash(_Flash):

    def __call__(self, message, category=None, ignore_duplicate=False, logf=None):

        """

        Show a message to the user _and_ log it through the specified function

        category: notice (default), warning, error, success

        logf: a custom log function - such as log.debug

        logf defaults to log.info, unless category equals 'success', in which

        case logf defaults to log.debug.

        """

        if logf is None:

            logf = log.info

            if category == 'success':

                logf = log.debug

        logf('Flash %s: %s', category, message)

        super(Flash, self).__call__(message, category, ignore_duplicate)

    def pop_messages(self):

        """Return all accumulated messages and delete them from the session.

        The return value is a list of ``Message`` objects.

        """

        from tg import session

        messages = session.pop(self.session_key, [])

        session.save()

        return [_Message(*m) for m in messages]

flash = Flash()

#==============================================================================

# SCM FILTERS available via h.

#==============================================================================

from kallithea.lib.vcs.utils import author_name, author_email

from kallithea.lib.utils2 import credentials_filter, age as _age

age = lambda x, y=False: _age(x, y)

capitalize = lambda x: x.capitalize()

email = author_email

short_id = lambda x: x[:12]

hide_credentials = lambda x: ''.join(credentials_filter(x))

def show_id(cs):

    """

    Configurable function that shows ID

    by default it's r123:fffeeefffeee

    :param cs: changeset instance

    """

    from kallithea import CONFIG

    def_len = safe_int(CONFIG.get('show_sha_length', 12))

    show_rev = str2bool(CONFIG.get('show_revision_number', False))

    raw_id = cs.raw_id[:def_len]

    if show_rev:

        return 'r%s:%s' % (cs.revision, raw_id)

    else:

<!doctype html>

<html lang="en">

<head><title>Notifications</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"></head>

<body>

<hr/>

<h1>cs_comment, is_mention=False, status_change=None</h1>

<pre>

From: u1

To: u2@example.com

Subject: [Comment] repo/name changeset cafe1234 "This changeset did something cl..." on brunch

</pre>

<hr/>

<pre>http://comment.org

Comment on Changeset "This changeset did something clever which is hard to explain"

Opinionated User (jsmith):

This is the new 'comment'.

 - and here it ends indented.

Changeset on http://example.com/repo_target branch brunch:

"This changeset did something clever which is hard to explain" by u2 u3 (u2).

View Comment: http://comment.org

</pre>

<hr/>

<!--!doctype html-->

<!--html lang="en"-->

<!--head-->

    <!--title--><!--/title-->

    <!--meta name="viewport" content="width=device-width"-->

    <!--meta http-equiv="Content-Type" content="text/html; charset=UTF-8"-->

<!--/head-->

<!--body-->

<table align="center" cellpadding="0" cellspacing="0" border="0" style="min-width:348px;max-width:800px;font-family:Helvetica,Arial,sans-serif;font-weight:200;font-size:14px;line-height:17px;color:#202020">

    <tr>

        <td width="30px" style="width:30px"></td>

        <td>

            <table width="100%" cellpadding="0" cellspacing="0" border="0"

                   style="table-layout:fixed;font-family:Helvetica,Arial,sans-serif;border:1px solid #ddd">

                <tr><td width="30px" style="width:30px"></td><td></td><td width="30px" style="width:30px"></td></tr>

                <tr>

                    <td colspan="3">

<table bgcolor="#f9f9f9" width="100%" cellpadding="0" cellspacing="0"

       style="border-bottom:1px solid #ddd">

    <tr>

        <td height="20px" style="height:20px" colspan="3"></td>

    </tr>

    <tr>

        <td width="30px" style="width:30px"></td>

        <td style="font-family:Helvetica,Arial,sans-serif;font-size:19px;line-height:24px">

            <a style="text-decoration:none;font-weight:600;color:#395fa0" href="http://comment.org"

               target="_blank">Comment on Changeset &#34;This changeset did something clever which is hard to explain&#34;</a>

        </td>

        <td width="30px" style="width:30px"></td>

    </tr>

    <tr>

        <td height="20px" style="height:20px" colspan="3"></td>

    </tr>

</table>

                    </td>

                </tr>

                <tr>

                    <td height="30px" style="height:30px" colspan="3"></td>

                </tr>

                <tr>

                    <td></td>

                    <td>

<table cellpadding="0" cellspacing="0" border="0" width="100%">

    <tr>

        <td>

<table cellpadding="0" cellspacing="0" width="100%" border="0" bgcolor="#f9f9f9" style="border:1px solid #ddd;border-radius:4px">

    <tr>

        <td height="10px" style="height:10px" colspan="3"></td>

    </tr>

    <tr>

        <td width="20px" style="width:20px"></td>

        <td>

            <div style="font-weight:600;color:#395fa0">Opinionated User (jsmith)</div>

        </td>

        <td width="20px" style="width:20px"></td>

    </tr>

    <tr>

        <td height="10px" style="height:10px" colspan="3" style="border-bottom:1px solid #ddd"></td>

    </tr>

    <tr>

        <td height="10px" style="height:10px" colspan="3"></td>

    </tr>

    <tr>

        <td width="20px" style="width:20px"></td>

        <td>

        </td>

        <td width="20px" style="width:20px"></td>

    </tr>

    <tr>

        <td height="10px" style="height:10px" colspan="3"></td>

    </tr>

</table>

        </td>

    </tr>

    <tr>

        <td height="30px" style="height:30px"></td>

    </tr>

    <tr>

        <td>

            <div>

                Changeset on

                <a style="color:#395fa0;text-decoration:none"

                   href="http://example.com/repo_target">http://example.com/repo_target</a>

                branch

                <span style="color:#395fa0">brunch</span>:

            </div>

            <div>

                "<a style="color:#395fa0;text-decoration:none"

                   href="http://changeset.com">This changeset did something clever which is hard to explain</a>"

                by

                <span style="color:#395fa0">u2 u3 (u2)</span>.

            </div>

        </td>

    </tr>

    <tr>

        <td>

<center>

    <table cellspacing="0" cellpadding="0" style="margin-left:auto;margin-right:auto">

        <tr>

            <td height="25px" style="height:25px"></td>

        </tr>

        <tr>

            <td style="border-collapse:collapse;border-radius:2px;text-align:center;display:block;border:solid 1px #395fa0;padding:11px 20px 11px 20px">

                <a href="http://comment.org" style="text-decoration:none;display:block" target="_blank">

                    <center>

                        <font size="3">

                            <span style="font-family:Helvetica,Arial,sans-serif;font-weight:700;font-size:15px;line-height:14px;color:#395fa0;white-space:nowrap;vertical-align:middle">View Comment</span>

                        </font>

                    </center>

                </a>

            </td>

        </tr>

    </table>

</center>

        </td>

    </tr>

</table>

                    </td>

                    <td></td>

                </tr>

                <tr>

                    <td height="30px" style="height:30px" colspan="3"></td>

                </tr>

            </table>

        </td>

        <td width="30px" style="width:30px"></td>

    </tr>

</table>

<!--/body-->

<!--/html-->

<hr/>

<hr/>

<h1>cs_comment, is_mention=True, status_change=None</h1>

<pre>

From: u1

To: u2@example.com

Subject: [Comment] repo/name changeset cafe1234 "This changeset did something cl..." on brunch

</pre>

<hr/>

<pre>http://comment.org

Mention in Comment on Changeset "This changeset did something clever which is hard to explain"

Opinionated User (jsmith):

This is the new 'comment'.

 - and here it ends indented.

Changeset on http://example.com/repo_target branch brunch:

"This changeset did something clever which is hard to explain" by u2 u3 (u2).

View Comment: http://comment.org

</pre>

<hr/>

<!--!doctype html-->

<!--html lang="en"-->

<!--head-->

    <!--title--><!--/title-->

    <!--meta name="viewport" content="width=device-width"-->

    <!--meta http-equiv="Content-Type" content="text/html; charset=UTF-8"-->

<!--/head-->

<!--body-->

<table align="center" cellpadding="0" cellspacing="0" border="0" style="min-width:348px;max-width:800px;font-family:Helvetica,Arial,sans-serif;font-weight:200;font-size:14px;line-height:17px;color:#202020">

    <tr>

        <td width="30px" style="width:30px"></td>

        <td>

            <table width="100%" cellpadding="0" cellspacing="0" border="0"

                   style="table-layout:fixed;font-family:Helvetica,Arial,sans-serif;border:1px solid #ddd">

                <tr><td width="30px" style="width:30px"></td><td></td><td width="30px" style="width:30px"></td></tr>

                <tr>

                    <td colspan="3">

<table bgcolor="#f9f9f9" width="100%" cellpadding="0" cellspacing="0"

       style="border-bottom:1px solid #ddd">

    <tr>

        <td height="20px" style="height:20px" colspan="3"></td>

    </tr>

    <tr>

        <td width="30px" style="width:30px"></td>

        <td style="font-family:Helvetica,Arial,sans-serif;font-size:19px;line-height:24px">

            <a style="text-decoration:none;font-weight:600;color:#395fa0" href="http://comment.org"

               target="_blank">Mention in Comment on Changeset &#34;This changeset did something clever which is hard to explain&#34;</a>

        </td>

        <td width="30px" style="width:30px"></td>

    </tr>

    <tr>

        <td height="20px" style="height:20px" colspan="3"></td>

    </tr>

</table>

                    </td>

                </tr>

                <tr>

                    <td height="30px" style="height:30px" colspan="3"></td>

                </tr>

                <tr>

                    <td></td>

                    <td>

<table cellpadding="0" cellspacing="0" border="0" width="100%">

    <tr>

        <td>

<table cellpadding="0" cellspacing="0" width="100%" border="0" bgcolor="#f9f9f9" style="border:1px solid #ddd;border-radius:4px">

    <tr>

        <td height="10px" style="height:10px" colspan="3"></td>

    </tr>

    <tr>

        <td width="20px" style="width:20px"></td>

        <td>

            <div style="font-weight:600;color:#395fa0">Opinionated User (jsmith)</div>

        </td>

        <td width="20px" style="width:20px"></td>

    </tr>

    <tr>

        <td height="10px" style="height:10px" colspan="3" style="border-bottom:1px solid #ddd"></td>

    </tr>

    <tr>

        <td height="10px" style="height:10px" colspan="3"></td>

    </tr>

    <tr>

        <td width="20px" style="width:20px"></td>

        <td>

        </td>

        <td width="20px" style="width:20px"></td>

    </tr>

    <tr>

        <td height="10px" style="height:10px" colspan="3"></td>

    </tr>

</table>

        </td>

    </tr>

    <tr>

        <td height="30px" style="height:30px"></td>

    </tr>

    <tr>

        <td>

            <div>

                Changeset on

                <a style="color:#395fa0;text-decoration:none"

                   href="http://example.com/repo_target">http://example.com/repo_target</a>

                branch

                <span style="color:#395fa0">brunch</span>:

            </div>

            <div>

                "<a style="color:#395fa0;text-decoration:none"

                   href="http://changeset.com">This changeset did something clever which is hard to explain</a>"

                by

                <span style="color:#395fa0">u2 u3 (u2)</span>.

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                            <span style="font-family:Helvetica,Arial,sans-serif;font-weight:700;font-size:15px;line-height:14px;color:#395fa0;white-space:nowrap;vertical-align:middle">View Comment</span>

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<h1>cs_comment, is_mention=False, status_change='Approved'</h1>

<pre>

From: u1

To: u2@example.com

Subject: [Approved: Comment] repo/name changeset cafe1234 "This changeset did something cl..." on brunch

</pre>

<hr/>

<pre>http://comment.org

Comment on Changeset "This changeset did something clever which is hard to explain"

Opinionated User (jsmith):

Status change: Approved

This is the new 'comment'.

 - and here it ends indented.

Changeset on http://example.com/repo_target branch brunch:

"This changeset did something clever which is hard to explain" by u2 u3 (u2).

View Comment: http://comment.org

</pre>

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            <a style="text-decoration:none;font-weight:600;color:#395fa0" href="http://comment.org"

               target="_blank">Comment on Changeset &#34;This changeset did something clever which is hard to explain&#34;</a>

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