package org.jinstagram.auth;
import org.jinstagram.auth.exceptions.OAuthException;
import org.jinstagram.auth.model.Constants;
import org.jinstagram.auth.model.OAuthConfig;
import org.jinstagram.auth.model.Token;
import org.jinstagram.auth.oauth.InstagramService;
import org.jinstagram.http.Verbs;
import org.jinstagram.utils.Preconditions;
import static org.jinstagram.http.URLUtils.formURLEncode;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class InstagramApi {
public String getAccessTokenEndpoint() {
return Constants.ACCESS_TOKEN_ENDPOINT;
}
public Verbs getAccessTokenVerb() {
return Verbs.POST;
}
public String getAuthorizationUrl(OAuthConfig config) {
Preconditions.checkValidUrl(config.getCallback(),
"Must provide a valid url as callback. Instagram does not support OOB");
// Append scope if present
if (config.hasScope()) {
return String.format(Constants.SCOPED_AUTHORIZE_URL, config.getApiKey(),
formURLEncode(config.getCallback()), formURLEncode(config.getScope()));
}
else {
return String.format(Constants.AUTHORIZE_URL, config.getApiKey(), formURLEncode(config.getCallback()));
}
}
public AccessTokenExtractor getAccessTokenExtractor() {
return new AccessTokenExtractor() {
private Pattern accessTokenPattern = Pattern.compile(Constants.ACCESS_TOKEN_EXTRACTOR_REGEX);
@Override
public Token extract(String response) {
Preconditions.checkEmptyString(response, "Cannot extract a token from a null or empty String");
Matcher matcher = accessTokenPattern.matcher(response);
if (matcher.find()) {
return new Token(matcher.group(1), "", response);
}
else {
throw new OAuthException("Cannot extract an acces token. Response was: " + response);
}
}
};
}
public InstagramService createService(OAuthConfig config) {
return new InstagramService(this, config);
}
}