"""
Implements the blogger xmlrpc interface.  Adds methods for:

   blogger.newPost:
       - appkey    (string)
       - blogid    (string)
       - username  (string)
       - password  (string)
       - content   (string)
       - publish   (boolean)
   
   blogger.editPost:
       - appkey    (string)
       - postid    (string)
       - username  (string)
       - password  (string)
       - content   (string)
       - publish   (boolean)

   blogger.getUsersBlogs:
       - appkey    (string)
       - username  (string)
       - password  (string)

   blogger.getUserInfo:
       - appkey    (string)
       - username  (string)
       - password  (string)

   blogger.deletePost:
   blogger.getRecentPosts:


If the configuration parameter config['xmlrpc_blogger_metaweblog']
is set to 'True' then blogger.getUsersBlogs returns one blog, otherwise
it returns one blog for each category.   If you are using a metaweblog
enabled client, you should probably set xmlrpc_blogger_metaweblog to 'True'

"""
import os, xmlrpclib, re
from Pyblosxom import tools, plugin_utils

LINEFEED = os.linesep


def verify_installation(request):
    config = request.getConfiguration()
    retval = 1

    # all config properties are optional
    if not config.has_key('xmlrpc_blogger_metaweblog'):
        print("missing optional property: 'xmlrpc_blogger_metaweblog'")

    return retval

def cb_xmlrpc_register(args):
    """
    Binds the methods that we handle with the function instances.
    """
    args["methods"].update( 
          { "blogger.getUserInfo": blogger_getUserInfo,
            "blogger.getUsersBlogs": blogger_getUsersBlogs,
            "blogger.getRecentPosts": blogger_getRecentPosts,
            "blogger.newPost": blogger_newPost,
            "blogger.editPost": blogger_editPost,
            "blogger.deletePost": blogger_deletePost })

    return args

def authenticate(request, username, password):
    """
    Handles authentication.  This works by getting the xmlrpc dispatcher
    plugin Python module and then calling authenticate on that.

    @param request: the pyblosxom Request instance
    @type  request: Request

    @param username: the username
    @type  username: string

    @param password: the password
    @type  password: string
    """
    xmlrpc_plugin = plugin_utils.get_plugin_by_name("xmlrpc")
    xmlrpc_plugin.authenticate(request, username, password)

def blogger_newPost(request, appkey, blogid, username, password, content,
        publish=1):
    """
    Used for creating new posts on the server
    """
    authenticate(request, username, password)

    config = request.getConfiguration()
    if os.path.isdir(os.path.normpath(os.path.join(config['datadir'],
            blogid[1:]))):
        # Look at content
        blogTitle = content.split(LINEFEED)[0].strip()

        tempMarker = (not publish and '-' or '')
        blogID = os.path.normpath(
            os.path.join(
                config['datadir'], blogid[1:] +
                re.sub('[^A-Za-z0-9]','_',blogTitle) + '.txt' +
                tempMarker
            )
        )
        if os.path.isfile(blogID) or os.path.isfile(blogID + '-'):
            # Generate a ficticious blog name
            blogID = os.path.normpath(
                os.path.join(
                    config['datadir'], blogid[1:] +
                    re.sub('[^A-Za-z0-9]','_',blogTitle) +
                    tools.generateRandStr() + '.txt' + tempMarker
                )
            )
        open(blogID, 'w').write(content.encode(config['blog_encoding']))

        # Generate BlogID
        return blogID.replace(config['datadir'], '')
    else: 
        raise xmlrpclib.Fault('PostError','Blog %s does not exist' % blogid)

def blogger_editPost(request, appkey, postid, username, password, content,
        publish=1):
    """
    Edit an existing post
    """
    authenticate(request, username, password)
    config = request.getConfiguration()
    filename = os.path.normpath(os.path.join(config['datadir'], postid[1:]))
    if publish and re.search(r'-$', filename):
        switchTo = re.sub(r'-$','',filename)
    elif not publish and re.search(r'txt$', filename):
        switchTo = filename + '-'
    else:
        switchTo = filename
    cache_driver = tools.importName('Pyblosxom.cache', 
            config.get('cacheDriver', 'base'))
    cache = cache_driver.BlosxomCache(request, config.get('cacheConfig', ''))
    # Check if file exists or not, edit everything here
    if os.path.isfile(filename):
        if filename != switchTo:
            if cache.has_key(filename):
                del cache[filename]
            os.remove(filename)

            if os.path.isfile(switchTo):
                basefilename, ext = os.path.splitext(os.path.basename(switchTo))
                dirname = os.path.dirname(switchTo)
                switchTo = os.path.normpath(
                    os.path.join(
                        config['datadir'], dirname[1:] + basefilename +
                        tools.generateRandStr() + ext
                    )
                )
        open(switchTo, 'w').write(content)
                
        return xmlrpclib.True
    else:
        raise xmlrpclib.Fault('UpdateError','Post does not exist')


def blogger_getUsersBlogs(request, appkey, username, password):
    """
    Returns trees below datadir
    """
    authenticate(request, username, password)
    config = request.getConfiguration()
    url = config.get('base_url', '')
    result = [{'url': url + '/', 'blogid': '/', 'blogName': '/'}]
    for directory in tools.Walk(request, config['datadir'], 0, re.compile(r'.*'), 1):
        blogpath = directory.replace(config['datadir'], '') + '/'
        blogpath = blogpath.replace(os.sep, '/')
        result.append({'url' : url + blogpath, 
                       'blogid' : blogpath, 
                       'blogName':blogpath})
    if config.get('xmlrpc_blogger_metaweblog','') == 'True':
        return result[:1]
    else:
        return result

def blogger_getUserInfo(request, appkey, username, password):
    """
    Useless Get user information feature
    """
    authenticate(request, username, password)
    # Change these values? Not that important unless some apps needs it.
    config = request.getConfiguration()
    url = config.get('base_url', '')
    return {'firstname':'Ficticious',
            'lastname':'User',
            'userid':'01',
            'email':'someuser@example.com',
            'nickname':'pyblosxom',
            'url':url}

def blogger_deletePost(request, appkey, postid, username, password, publish):
    """
    Delete an existing post
    """
    # Really want to implement this? hmmm
    authenticate(request, username, password)
    config = request.getConfiguration()
    url = config.get('base_url', '')
    cache_driver = tools.importName('Pyblosxom.cache', 
            config.get('cacheDriver', 'base'))
    cache = cache_driver.BlosxomCache(request, config.get('cacheConfig', ''))
    fn = os.path.normpath(os.path.join(config['datadir'], postid))

    data = request.getData()
    extensions = data['extensions']
    for e in extensions.keys():
        filename = fn+'.'+e
        if os.path.isfile(filename):
            break
            
    if os.path.isfile(filename):
        if cache.has_key(filename):
            del cache[filename]
        os.remove(filename)
        return xmlrpclib.True
    else:
        raise xmlrpclib.Fault('DeleteError','Post does not exist')

def blogger_getRecentPosts(request, appkey, blogid, username, password,
        numberOfPosts=5):
    """
    Get recent posts from a blog tree
    """
    authenticate(request, username, password)
    config = request.getConfiguration()
    data = request.getData()
    from Pyblosxom.entries.fileentry import FileEntry
    from Pyblosxom import pyblosxom

    exts = tools.run_callback("entryparser",
                {'txt': pyblosxom.blosxom_entry_parser},
                mappingfunc=lambda x,y:y,
                defaultfunc=lambda x:x)

    data['extensions'] = exts
    
    result = []
    dataList = []
    filelist = tools.Walk(request, os.path.join(config['datadir'], blogid[1:]), 
            pattern = re.compile(r'.*\.(' +
            '|'.join(exts.keys()) + ')-?$'), 
            recurse = 1)
    for ourfile in filelist:
        entry = FileEntry(request, ourfile, config['datadir'])
        dataList.append((entry._mtime, entry))

    # this sorts entries by mtime in reverse order.  entries that have
    # no mtime get sorted to the top.
    dataList.sort()
    dataList.reverse()
    dataList = [x[1] for x in dataList]
    
    count = 1
    for entry in dataList:
        result.append({'dateCreated' : xmlrpclib.DateTime(entry['mtime']),
                       'userid' : '01',
                       'postid' : entry['filename'].replace(
                                  config['datadir'],''),
                       'content' : open(entry['filename']).read()})
        if count >= int(numberOfPosts):
            break
        count += 1
    return result

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