FormValidate.java

package in.co.praveenkumar.mdroid.helper;


import android.util.Patterns;

public class FormValidate {
    String username;
    String password;
    String token;
    String url;

    /**
     * Check field validity for login fields
     *
     * @param username
     * @param password
     * @param url
     * @return validity true if valid. false, otherwise.
     */
    public Boolean valid(String username, String password, String url) {
        this.username = username;
        this.password = password;
        this.url = url;
        if (getUsernameError(username) != null
                || getPasswordError(password) != null
                || getUrlError(url) != null)
            return false;
        return true;
    }

    /**
     * Check field validity for login fields
     *
     * @param token
     * @param url
     * @return validity true if valid. false, otherwise.
     */
    public Boolean valid(String token, String url) {
        this.token = token;
        this.url = url;
        if (getTokenError(token) != null || getUrlError(url) != null)
            return false;
        return true;
    }

    /**
     * Get errors while validating username field.
     *
     * @param username Username to check
     * @return Error message (null if valid)
     */
    public String getUsernameError(String username) {
        if (username.contentEquals(""))
            return "Username can't be empty";
        return null;
    }

    /**
     * Check the validity of the password field.
     *
     * @param password password to check
     * @return Error message (null if valid)
     */
    public String getPasswordError(String password) {
        if (password.contentEquals(""))
            return "Password can't be empty";
        return null;
    }

    /**
     * Check the validity of the token field.
     *
     * @param token token to check
     * @return Error message (null if valid)
     */
    public String getTokenError(String token) {
        if (token.contentEquals(""))
            return "Token can't be empty";
        return null;
    }

    /**
     * Check the validity of the url field.
     *
     * @param url url to check
     * @return Error message (null if valid)
     */
    public String getUrlError(String url) {
        if (url.contentEquals(""))
            return "url can't be empty";
        if (!Patterns.WEB_URL.matcher(url).matches())
            return "Invalid moodle url";
        return null;
    }

}