function D = LMdatabase(varargin)
%
% This function reads the LabelMe database into a Matlab struct.
%
% Different ways of calling this function
% database = LMdatabase(HOMEANNOTATIONS); % reads only annotated images
% database = LMdatabase(HOMEANNOTATIONS, HOMEIMAGES); % reads all images
% database = LMdatabase(HOMEANNOTATIONS, folderlist);
% database = LMdatabase(HOMEANNOTATIONS, HOMEIMAGES, folderlist);
% database = LMdatabase(HOMEANNOTATIONS, folderlist, filelist);
%
% Reads all the annotations.
% It creates a struct 'almost' equivalent to what you would get if you concatenate
% first all the xml files, then you add at the beggining the tag <D> and at the end </D> 
% and then use loadXML.m
%
% You do not need to download the database. The functions that read the
% images and the annotation files can be refered to the online tool. For
% instance, you can run the next command:
%
% HOMEANNOTATIONS = 'http://labelme.csail.mit.edu/Annotations'
% D = LMdatabase(HOMEANNOTATIONS);
%
% This will create the database struct without needing to download the
% database. It might be slower than having a local copy. 
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% LabelMe, the open annotation tool
% Contribute to the database by labeling objects using the annotation tool.
% http://labelme.csail.mit.edu/
% 
% CSAIL, MIT
% 2006
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% LabelMe is a WEB-based image annotation tool and a Matlab toolbox that allows 
% researchers to label images and share the annotations with the rest of the community. 
%    Copyright (C) 2008  MIT, Computer Science and Artificial
%    Intelligence Laboratory. Antonio Torralba, Bryan Russell, William T. Freeman
%
%    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/>.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Created: A. Torralba, 2006
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% This function removes all the deleted polygons. If you want to read them
% too, you have to comment line 132.

% Parse input arguments and read list of folders
N = nargin;
for n = 1:N
    ty(n) = iscell(varargin{n})
end

paths = varargin(find(ty==0));
filelists = varargin(find(ty==1));

% Read paths
HOMEANNOTATIONS = paths{1};
if length(paths)==2
    HOMEIMAGES = paths{2};
else
    HOMEIMAGES = '';
end

% Folder and image lists
folderlist = [];
annotationslist = [];
if length(filelists)==2
    folderlist = filelists{1};
    annotationslist = filelists{2};
end
if length(filelists)<2
    % Create list of folders
    if length(filelists)==0
        if ~strcmp(HOMEANNOTATIONS(1:5), 'http:');
            folders = genpath(HOMEANNOTATIONS);
            h = [findstr(folders,  pathsep)];
            h = [0 h];
            Nfolders = length(h)-1
            Folder = [];
            for i = 1:Nfolders
                tmp = folders(h(i)+1:h(i+1)-1);
                tmp = strrep(tmp, HOMEANNOTATIONS, ''); tmp = tmp(2:end);
                Folder{i} = tmp;
            end
        else
            files = urldir(HOMEANNOTATIONS);
            Folder = {files(2:end).name}; % the first item is the main path name
        end
    else
        Folder = unique(folderlist);
    end
    
    % Create list of images
    filesImages = [];
    Nfolders = length(Folder);
    k = 0;
    for n = 1:Nfolders
        if ~strcmp(HOMEANNOTATIONS(1:5), 'http:');
            filesAnnotations = dir(fullfile(HOMEANNOTATIONS, folder{n}, '*.xml'));
            if length(HOMEIMAGES)>0
                filesImages = dir(fullfile(HOMEIMAGES, folder{n}, '*.jpg'));
            end
        else
            filesAnnotations = urlxmldir(fullfile(HOMEANNOTATIONS, folder{n}));
            if length(HOMEIMAGES)>0
                filesImages = urldir(fullfile(HOMEIMAGES, folder{n}), 'img');
            end
        end
        
        for m = 1:length(filesAnnotations)
            k = k+1;
            folderlist{k} = Folder{n};
            annotationslist{k} = filesAnnotations{n};
        end
    end
end

% Open figure that visualizes the file and folder counter
Hfig = plotbar;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Loop on folders
D = []; n = 0; nPolygons = 0;
for f = 1:length(folderlist)
    filename = fullfile(HOMEANNOTATIONS, folderlist{f}, strrep(annotationslist{f}, '.jpg', '.xml'));
    [v, xml] = loadXML(filename);

    n = n+1;

    % Add folder and file name to the scene description
    if ~isfield(v.annotation, 'scenedescription')
        v.annotation.scenedescription = [v.annotation.folder ' ' v.annotation.filename];
    end

    % Add object ids
    if isfield(v.annotation, 'object')
        for m = 1:length(v.annotation.object)
            v.annotation.object(m).id = m;
        end
    end

    % store annotation into the database
    D(n).annotation = v.annotation;

    if mod(f,10)==1
        plotbar(Hfig,1,1,f,length(folderlist));
    end
end

% Remove all the deleted objects. Comment this line if you want to see all
% the deleted files.
D = LMvalidobjects(D);

% Add view point into the object name
D = addviewpoint(D);

% Add image size field
% D = addimagesize(D);

% % Summary database;
disp(sprintf('LabelMe Database summary:\n Total of %d annotated images.', length(D)))
% 
close(Hfig)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function fig = plotbar(fig,nf,Nf,ni,Ni)

if nargin > 0
    clf(fig)
    %ha = subplot(2,1,1, 'parent', fig); cla(ha)
    %p = patch([0 1 1 0],[0 0 1 1],'w','EraseMode','none', 'parent', ha);
    %p = patch([0 1 1 0]*nf/Nf,[0 0 1 1],'g','EdgeColor','k','EraseMode','none', 'parent', ha);
    %axis(ha,'off')
    %title(sprintf('folders (%d/%d)',nf,Nf), 'parent', ha)
    ha = subplot(2,1,2, 'parent', fig); cla(ha)
    p = patch([0 1 1 0],[0 0 1 1],'w','EraseMode','none', 'parent', ha);
    p = patch([0 1 1 0]*ni/Ni,[0 0 1 1],'r','EdgeColor','k','EraseMode','none', 'parent', ha);
    axis(ha,'off')
    title(sprintf('files (%d/%d)',ni,Ni), 'parent', ha)
    drawnow
else
    % Create counter figure
    screenSize = get(0,'ScreenSize');
    pointsPerPixel = 72/get(0,'ScreenPixelsPerInch');
    width = 360 * pointsPerPixel;
    height = 2*75 * pointsPerPixel;
    pos = [screenSize(3)/2-width/2 screenSize(4)/2-height/2 width height];
    fig = figure('Units', 'points', ...
        'NumberTitle','off', ...
        'IntegerHandle','off', ...
        'MenuBar', 'none', ...
        'Visible','on',...
        'position', pos,...
        'BackingStore','off',...
        'DoubleBuffer','on');
end

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function files = urlxmldir(page)

files = []; Folder = [];
page = strrep(page, '\', '/');

folders = urlread(page);
folders = folders(1:length(folders));
j1 = findstr(lower(folders), '<a href="');
j2 = findstr(lower(folders), '</a>');
Nfolders = length(j1);

fn = 0;
for f = 1:Nfolders
    tmp = folders(j1(f)+9:j2(f)-1);
    fin = findstr(tmp, '"');
    if length(findstr(tmp(1:fin(end)-1), 'xml'))>0
        fn = fn+1;
        Folder{fn} = tmp(1:fin(end)-1);
    end
end

for f = 1:length(Folder)
    files(f).name = Folder{f};
    files(f).bytes = 1;
end