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twitty.m
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twitty.m
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classdef twitty < handle
% Interface-class to the Twitter REST API.
%
% twitty is a MATLAB class for interaction with the twitter platform via its REST API.
% Here are some examples of its usage:
% tw = twitty(credentials); % create a twitty object and supply user credentials.
% The credentials argument is a structure with the user account's credentials.
% The fields are: .ConsumerKey, .ConsumerSecret, .AccessToken, .AccessTokenSecret. E.g.,
% credentials.ConsumerKey = 'WuhMKJJXx0TzEtu435OXVA'
% credentials.ConsumerSecret = '5ezt6zOG6dDWLZNzxUHsKJtUs52kmMtDqzV7nEjnhU'
% credentials.AccessToken = '188321184-7iVtMvx3JVhwfdvJf5J2NKiuQzTz47UnQsFJnWlG'
% credentials.AccessTokenSecret = 'idev6Hmq68EsVIQb3pP8nSeN9Rt629BJ4yPKlqlwZk'.
%
% For details on OBTAINING TWITTER CREDENTIALS, see the corresponding section below.
%
% After setting the credentials, you should be able to access your twitter account from MATLAB. E.g.:
% 1. S = tw.search('matlab'); % search twitter.com for messages including the word 'matlab'.
% 2. S = tw.updateStatus('Hello, Twitter!'); % or twit something cooler.
% 3. S = tw.publicTimeline(); % get 20 recent public messages.
% 4. S = tw.userTimeline('screen_name', 'matlab'); % get recent messages posted by the user 'matlab';
% 5. S = tw.trendsDaily(datestr(now-1,'yyyy-mm-dd')); % get yesterday's trends.
%
% Conceptually, twitty is just a collection of wrapper functions around the main function that
% calls the twitter API. This API caller function, callTwitterAPI(), does the main job: creates
% an http request, handles authentication and encoding, sends the request to and parses a
% response from the twitter.com. It is not ment to be called directly but should be invoked
% from a wrapper function.
%
% The wrapper functions provide an intuitive MATLAB-style interface for accessing the
% twitter's API resources. For the complete description of the REST API, refer to the official
% documentation at https://dev.twitter.com/docs/api.
% The API is quite extensive and twitty doesn't cover it all. It includes most of the
% resources in the following sections: TIMELINE, TWEETS, SEARCH, FRIENDS & FOLLOWERS, USERS,
% ACCOUNTS, PLACES & GEO, and HELP.
%
% For the complete summary of the twitty's interface functions run the 'twitty.API' command.
% For information on a particular function, type 'help twitty.<function name>'.
%
% REQUIREMENTS:
% optional - the json parser by Joel Feenstra:
% http://www.mathworks.co.uk/matlabcentral/fileexchange/20565-json-parser
%
% OBTAINING TWITTER CREDENTIALS
%
% Access to many of the twitter's resources requires an authorization with the credentials
% corresponidng to a valid user account. The credentials consist of four strings: Consumer key,
% Consumer secret, Access token, and Access token secret. The former two correspond to the
% application accessing twitter API (called the consumer), i.e., to this class. The latter two
% are used to identify a twitter user.
%
% The procedure of obtaining twitter credentials is described in the twitter documentation:
% https://dev.twitter.com/docs/auth/tokens-devtwittercom.
%
% Here is a summary of the steps:
%
% 1. Register twitty in your twitter account.
% Go to the dev.twitter.com "My applications" page, either by navigating to
% dev.twitter.com/apps, or hovering over your profile image in the top right hand corner of
% the site and selecting "My applications".
%
% 2. Click "Create new application" and follow the instructions. Enter something like,
% Name: twitty MATLAB class;
% Description: MATLAB interface to twitter API.
% Website: http://www.mathworks.com/matlabcentral/fileexchange/34837
% Upon creation, your application will be assigned the two Consumer keys.
%
% 3. Click "Create my access token" button at the bottom of the page, to obtain the two Access
% tokens.
%
% 4. At the "Settings" tab, change the "Access level" to "Read and write".
%
% There are two options to use the obtained credentials with the twitty.
% 1. Supply user credentials each time a twitty object is created.
% This can be done either at a constructor call, i.e., tw = twitty(credentials),
% or after an object is created without credentials, tw = twitty(), with the
% tw.setCredentials(credentials) function. The input argument "credentials" is a structure
% with the four fields: .ConsumerKey, .ConsumerSecret, .AccessToken, and .AccessTokenSecret.
%
% 2. Save credentials to the MATLAB preferences database for persistent use.
% This option is preferable if twitty is used with a single user account only.
% Create a twitty object without credentials: tw = twitty().
% Call tw.saveCredentials() and copy and past the credentials into the corresponding fields
% of the opened gui.
% The stored in this way credentials will be used each time a twitty object is created
% without specifying the credentials, i.e., tw = twitty.
% (c) 2012, Vladimir Bondarenko <http://sites.google.com/site/bondsite>
properties(Access = private)
credentials = '';
end
properties
user_id;
end
%% Auxiliary functions
methods
function twtr = twitty(creds)
% Constructor of a twitty object.
%
% INPUT: (optional)
% creds - a structure with user account's credentials. The fields:
% .ConsumerKey, .ConsumerSecret,
% .AccessToken, .AccessTokenSecret.
% OUTPUT: twitty object.
%
% If credentials are not provided, twitty() attempts to load them
% from the MATLAB preferences: the group name is 'TwitterAuthentication,
% preference name 'AccessTokens'. If the corresponding
% preference is not set, a warning is issued.
%
% For the information about obtaining twitter credentials, see twitty description:
% help twitty.
switch nargin
case 0
% check if the preference exists:
groupName = 'TwitterAuthentication';
prefName = 'AccessTokens';
if ispref(groupName, prefName)
twtr.credentials = getpref(groupName, prefName);
else % issue a warning:
warning('twitty:CredentialsUnderfined',...
['Twitter credentials were not set.\n',...
'Functions requiring an authorized access will be disabled.\n',...
'To set credentials use the setCredentials() function\n',...
'or save credentials to the MATLAB preferences database for\n',...
'persistent use using the saveCredentials() funciton.\n'...
'For details, type ''help twitty''.']);
end
case 1
% check input type:
if ~isstruct(creds), error('Input argument must be a structure.'); end
% check for the proper field names:
inputFields = fieldnames(creds);
credentialFields = {'ConsumerKey','ConsumerSecret',...
'AccessToken','AccessTokenSecret'};
for ii=1:length(credentialFields)
if sum(strcmpi(inputFields(ii),credentialFields))==0
error('Wrong field names for the credentials structure.');
end
end
% set credentials:
twtr.credentials = creds;
% check, if the entered credentials are valid:
S = twtr.accountVerifyCredentials;
if isstruct(S)
if strcmpi('error', fieldnames(S)), error('The supplied credentials are not valid.'); end
else
if strfind(lower(S{1}),'error'), error('The supplied credentials are not valid.'); end
end
end
end
function setCredentials(twtr,creds)
% Set user credentials.
%
% Usage: twitty_obj.setCredentials(creds)
% INPUT: creds - a structure with user account's credentials. The fields:
% .ConsumerKey, .ConsumerSecret,
% .AccessToken, .AccessTokenSecret.
%
% OUTPUT: none.
% parse input:
if nargin~=2, error('Wrong number of input arguments.'); end
if ~isstruct(creds), error('Input must be a structure.'); end
% check for the proper field names:
inputFields = fieldnames(creds);
credentialFields = {'ConsumerKey','ConsumerSecret',...
'AccessToken','AccessTokenSecret'};
for ii=1:length(credentialFields)
if sum(strcmpi(inputFields(ii),credentialFields))==0
error('Wrong field names for the credentials structure.');
end
end
% set credentials:
twtr.credentials = creds;
% check, if the entered credentials are valid:
S = twtr.accountVerifyCredentials;
if isstruct(S)
if strcmpi('error', fieldnames(S)), error('The supplied credentials are not valid.'); end
else
if strfind(lower(S),'error'), error('The supplied credentials are not valid.'); end
end
end
function creds = getCredentials(twtr)
% Return user credentials.
%
% Usage: creds = twitty_obj.getCredentials;
%
% INPUT: none.
% OUTPUT: creds - a structure with Twitter account's credentials. The fields:
% .ConsumerKey, .ConsumerSecret, .AccessToken, .AccessTokenSecret.
creds = twtr.credentials;
end
function saveCredentials(twtr)
% GUI to set and save credentials to the MATLAB preferences.
%
% Usage: twitty_obj.saveCredentials();
%
% INPUT: Enter Twitter credentials to the corresponding fields in the opened gui.
%
% The credentials will be saved to the MATLAB preferences under the group name
% 'TwitterAuthentication' and preference name 'AccessTokens', and will be used each
% time a twitty object is created without credentials.
% Preference group and name:
groupName = 'TwitterAuthentication';
prefName = 'AccessTokens';
% Create a dialog box:
dlgTitle = 'Specify Twitter credentials';
promt = {'ConsumerKey','ConsumerSecret','AccessToken','AccessTokenSecret'};
opts = struct('Resize','on','WindowStyle','normal');
if ispref(groupName,prefName)
defs = struct2cell( getpref(groupName,prefName) );
else
defs = {'','','',''};
end
answ = inputdlg(promt,dlgTitle,1,defs,opts);
% Set the preference:
if isempty(answ)
return;
else
creds = cell2struct(answ,promt,1);
setpref(groupName,prefName,creds);
% Set credentials:
twtr.credentials = creds;
% check, if the entered credentials are valid:
S = twtr.accountVerifyCredentials;
if isstruct(S)
if strcmpi('error', fieldnames(S)), error('The credentials are not valid.'); end
else
if strfind(lower(S),'error'), error('The credentials are not valid.'); end
end
end
end
end
methods(Static)
function API()
% Display the summary of implemented twitter API functions.
fid = fopen('twitty.m');
tline = fgetl(fid);
while ischar(tline)
if ~isempty(regexpi(tline,'^%%')) && isempty(strfind(tline,'Auxiliary'))
disp(upper(tline));
end
if regexpi(tline,'^\s*function S =');
% extract the function name:
fname = regexpi(tline,'\s*function S = ([a-z_]+)\(\.*','tokens','once');
tab = blanks(25-length(fname{1}));
% get the first help line:
hline = regexprep(fgetl(fid),'^\s+%','');
fprintf([' ' fname{1} '()' tab hline '\n']);
end
tline = fgetl(fid);
end
end
end
methods
% Methods interfacing Twitter API:
%% Timeline
function S = homeTimeline(twtr,varargin)
% Returns the 20 most recent statuses posted by the authenticating user
% and the user's they follow.
%
% Usage: S = twitty_obj.homeTimeline();
% S = twitty_obj.homeTimeline(parKey1, parVal1, parKey2, parVal2, ...);
% INPUT:
% (optional)
% parKey?,
% parVal - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/home_timeline".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.homeTimeline('include_entities','true','count',4);
% Check for credentials:
twtr.checkCredentials();
% Parse the input:
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
if nargin == 1
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://twitter.com/statuses/home_timeline.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = publicTimeline(twtr,varargin)
% Returns the 20 most recent statuses, including retweets if they exist,
% from non-protected users.
%
% Usage: S = twitty_obj.publicTimeline();
% S = twitty_obj.publicTimeline(parKey1, parVal1, parKey2, parVal2, ...);
% INPUT:
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/public_timeline".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.publicTimeline('include_entities','true');
% Parse input:
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
if nargin == 1
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://twitter.com/statuses/public_timeline.json';
S = twtr.callTwitterAPI(httpMethod,url,params,0);
end
function S = userTimeline(twtr,varargin)
% Get recent statuses posted by the authenticating user.
%
% Usage: S = twitty_obj.userTimeline('user_id', user_id) or
% S = twitty_obj.userTimeline('screen_name', screen_name);
% S = twitty_obj.userTimeline(..., parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: Always specify either
% user_id - a string specifying user ID or
% screen_name - a string specifying user screen_name.
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/user_timeline".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.userTimeline('screen_name','twitterapi');
% 2. S = tw.userTimeline('screen_name','twitterapi','count',5,'include_entities','true')
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 3, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/user_timeline.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = mentions(twtr,varargin)
% Returns the 20 most recent mentions (status containing @username)
% for the authenticating user.
%
% Usage: S = twitty_obj.mentions(parKey1, parVal1, parKey2, parVal2, ...);
% INPUT:
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/mentions".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.mentions('include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 1, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
if nargin == 1
params = '';
else
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/mentions.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetedByMe(twtr,varargin)
% Returns the 20 most recent retweets posted by the authenticating user.
%
% Usage: S = twitty_obj.retweetedByMe();
% S = twitty_obj.retweetedByMe(parKey1, parVal1, parKey2, parVal2, ...);
% INPUT:
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/retweeted_by_me".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.retweetedByMe('include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 1, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
if nargin == 1
params = '';
else
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/retweeted_by_me.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetedToMe(twtr,varargin)
% Returns the 20 most recent retweets posted by users the authenticating user follows.
%
% Usage: S = twitty_obj.retweetedToMe();
% S = twitty_obj.retweetedToMe(parKey1, parVal1, parKey2, parVal2, ...);
% INPUT:
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/retweeted_to_me".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.retweetedToMe('include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 1, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
if nargin == 1
params = '';
else
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/retweeted_to_me.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetsOfMe(twtr,varargin)
% Returns the 20 most recent tweets of the authenticated user that have been retweeted
% by others.
%
% Usage: S = twitty_obj.retweetsOfMe();
% S = twitty_obj.retweetsOfMe(parKey1, parVal1, parKey2, parVal2, ...);
% INPUT:
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/retweets_of_me".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.retweetsOfMe('include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 1, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
if nargin == 1
params = '';
else
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/retweets_of_me.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetedToUser(twtr,varargin)
% Returns the 20 most recent retweets posted by users the specified user follows.
%
% The user is specified using the user_id or screen_name parameters.
% This method is identical to statuses/retweeted_to_me except you can choose the user to view.
%
% Usage: S = twitty_obj.retweetedToUser('user_id', user_id) or
% S = twitty_obj.retweetedToUser('screen_name', screen_name);
% S = twitty_obj.retweetedToUser(..., parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: Specify either
% user_id - a string specifying user ID or
% screen_name - a string specifying user screen_name.
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/retweeted_to_user".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.retweetedToUser('screen_name','twitterapi');
% 2. S = tw.retweetedToUser('screen_name','twitterapi','count',5,'include_entities','true')
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 3, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/retweeted_to_user.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetedByUser(twtr,varargin)
% Returns the 20 most recent retweets posted by the specified user.
%
% The user is specified using the user_id or screen_name parameters.
% This method is identical to statuses/retweeted_by_me except you can
% choose the user to view.
%
% Usage: S = twitty_obj.retweetedByUser('user_id', user_id) or
% S = twitty_obj.retweetedByUser('screen_name', screen_name);
% S = twitty_obj.retweetedByUser(..., parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: Specify either
% user_id - a string specifying user ID or
% screen_name - a string specifying user screen_name.
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/retweeted_by_user".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.retweetedByUser('screen_name','twitterapi');
% 2. S = tw.retweetedByUser('screen_name','twitterapi','count',5,'include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 3, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/statuses/retweeted_to_user.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
%% Tweets
function S = updateStatus(twtr,status,varargin)
% Update the authenticating user's status (twit).
%
% Usage: S = twitty_obj.updateStatus(status);
% S = twitty_obj.updateStatus(status, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: status - the status string;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/post/statuses/update".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.updateStatus('hello twitter!','include_entities','true','wrap_links','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
params.status = status;
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'POST';
url = 'http://api.twitter.com/1/statuses/update.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetedBy(twtr,id,varargin)
% Show user objects of up to 100 members who retweeted the status.
%
% Usage: S = twitty_obj.retweetedBy(id);
% S = twitty_obj.retweetedBy(id, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: id - a string, specifying the ID of the desired status;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/%3Aid/retweeted_by".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.retweetedBy('21947795900469248');
% 2. S = tw.retweetedBy('21947795900469248','count',10);
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
if ~ischar(id), error('The "id" argument must be a string.'); end;
if nargin == 2
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'GET';
url = ['http://api.twitter.com/version/statuses/' id '/retweeted_by.xml'];
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetedBy_ids(twtr,id,varargin)
% Show user ids of up to 100 users who retweeted the status.
%
% Usage: S = twitty_obj.retweetedBy_ids(id);
% S = twitty_obj.retweetedBy_ids(id, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: id - a string, specifying the ID of the desired status;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/%3Aid/retweeted_by/ids".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.retweetedBy_ids('21947795900469248');
% 2. S = tw.retweetedBy_ids('21947795900469248','count',10);
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
if ~ischar(id), error('The "id" argument must be a string.'); end;
if nargin == 2
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'GET';
url = ['http://api.twitter.com/version/statuses/' id '/retweeted_by/ids.json'];
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweets(twtr,id,varargin)
% Returns up to 100 of the first retweets of a given tweet.
%
% Usage: S = twitty_obj.retweets(id);
% S = twitty_obj.retweets(id, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: id - a string, specifying the ID of the desired status;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/retweets/%3Aid".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.retweets('21947795900469248');
% 2. S = tw.retweets('21947795900469248','count',10);
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
if ~ischar(id), error('The "id" argument must be a string.'); end;
if nargin == 2
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'GET';
url = ['http://api.twitter.com/version/statuses/' id '.json'];
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = showStatus(twtr,id,varargin)
% Returns a single status, specified by the id parameter below.
%
% Usage: S = twitty_obj.showStatus(id);
% S = twitty_obj.showStatus(id, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: id - a string, specifying the ID of the desired status;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/statuses/show/%3Aid".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.showStatus('159462956281769985');
% 2. S = tw.showStatus('159462956281769985','count',10);
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
if ~ischar(id), error('The "id" argument must be a string.'); end;
if nargin == 2
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'GET';
url = ['http://api.twitter.com/version/statuses/' id '.json'];
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = destroyStatus(twtr,id,varargin)
% Destroys the status specified by the required ID parameter.
%
% Usage: S = twitty_obj.destroyStatus(id);
% S = twitty_obj.destroyStatus(id, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: id - a string, specifying the ID of the desired status;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/post/statuses/destroy/%3Aid".
% OUTPUT: S - destroyed status: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.destroyStatus('158310427602857984');
% 2. S = tw.destroyStatus('158310427602857984','include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
if ~ischar(id), error('The "id" argument must be a string.'); end;
if nargin == 2
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'POST';
url = ['http://api.twitter.com/version/statuses/destroy/' id '.json'];
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = retweetStatus(twtr,id,varargin)
% Retweets a tweet.
%
% Usage: S = twitty_obj.retweetStatus(id);
% S = twitty_obj.retweetStatus(id, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: id - a string, specifying the ID of the desired status;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/post/statuses/retweet/%3Aid".
% OUTPUT: S - he original tweet with retweet details embedded: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.retweetStatus('159752327782342656');
% 2. S = tw.retweetStatus('159752327782342656','include_entities','true');
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
if ~ischar(id), error('The "id" argument must be a string.'); end;
if nargin == 2
params = '';
else
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
end
% Call Twitter API:
httpMethod = 'POST';
url = ['http://api.twitter.com/version/statuses/retweet/' id '.json'];
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
%% Search
function S = search(twtr,query,varargin)
% Search twitter.
%
% Usage: S = twitty_obj.search(query);
% S = twitty_obj.search(query, parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: query - the query string;
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/search".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% tw = twitty; S = tw.search('matlab','include_entities','true');
% Parse input:
if nargin < 2, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 1, error('Wrong number of input arguments.'); end;
params.q = query;
for ii=1:2:nargin-2
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://search.twitter.com/search.json';
S = twtr.callTwitterAPI(httpMethod,url,params,0);
end
%% Friends & Followers
function S = followersIds(twtr,varargin)
% Returns an array of numeric IDs for every user following the specified user.
%
% Usage: S = twitty_obj.followersIds('user_id', user_id) or
% S = twitty_obj.followersIds('screen_name', screen_name);
% S = twitty_obj.followersIds(..., parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: Specify either
% user_id - a string specifying user ID or
% screen_name - a string specifying user screen_name.
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/followers/ids".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.followersIds('screen_name','twitterapi');
% 2. S = tw.followersIds('screen_name','twitterapi','cursor',-1);
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 3, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/followers/ids.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = friendsIds(twtr,varargin)
% Returns an array of numeric IDs for every user the specified user is following.
%
% Usage: S = twitty_obj.friendsIds('user_id', user_id) or
% S = twitty_obj.friendsIds('screen_name', screen_name);
% S = twitty_obj.friendsIds(..., parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: Specify either
% user_id - a string specifying user ID or
% screen_name - a string specifying user screen_name.
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/followers/ids".
% OUTPUT: S - response from the Twitter API: either a structure
% (requires "parse_json.m" from the MATLAB file exchange),
% or a json string.
% Examples:
% 1. tw = twitty; S = tw.friendsIds('screen_name','twitterapi');
% 2. S = tw.friendsIds('screen_name','twitterapi','cursor',-1);
% Check for credentials:
twtr.checkCredentials();
% Parse input:
if nargin < 3, error('Insufficient number of input arguments.'); end;
if mod(nargin,2) == 0, error('Wrong number of input arguments.'); end;
for ii=1:2:nargin-1
parKey = varargin{ii}; parVal = varargin{ii+1};
if ~ischar(parKey), error('Parameter Key must be a string.'); end
if isnumeric(parVal), parVal = num2str(parVal); end
params.(parKey) = parVal;
end
% Call Twitter API:
httpMethod = 'GET';
url = 'http://api.twitter.com/1/friends/ids.json';
S = twtr.callTwitterAPI(httpMethod,url,params,1);
end
function S = friendshipsExists(twtr,varargin)
% Test for the existence of friendship between two users.
%
% Usage: S = twitty_obj.friendshipsExists('user_id_a', user_id_a, 'user_id_b, user_id_b) or
% S = twitty_obj.friendshipsExists('screen_name_a', screen_name_a, 'screen_name_b', screen_name_b);
% S = twitty_obj.friendshipsExists(..., parKey1, parVal1, parKey2, parVal2, ...);
% INPUT: Specify either
% user_id_{a,b} - strings specifying user IDs or
% screen_name_{a,b} - string specifying user screen_names.
% (optional)
% parKey?,
% parVal? - parameters Key/Value pairs. For the complete list,
% refer to "https://dev.twitter.com/docs/api/1/get/friendships/exists".
% OUTPUT: S - 'true or 'false' string.
%
% Examples:
% tw = twitty;