// Switch to Mata interpreter/compiler
mata:

// Drops class object if it already exists
// mata drop base()

// Definition of HTML Tag base Mata Class
// Specifies the base URL/target for all relative URLs in a document// Information retrieved from http://www.w3schools.com/tags/tag_base.asp
class base extends htmlglobal {

    // Define private member variables
    private:

    // Static/final variables
    static       string  scalar  opens, opene, close

    // String scalar attributes
    string               scalar          htmlhref, htmltarget

    // Make class args non-static to prevent assignment of class args to all instances of class
    string               scalar          classargs

    // Define public members/methods
    public:

    // Class constructor method
    void         new()

    // Setter methods
    class        base     scalar  setClassArgs(), setHref(), setTarget()

    // Getter methods
    string               scalar          getOpens(), getOpene(), getClose(), print(), getClassArgs(), getHref(), getTarget()

} // End of class declaration

// Class constructor method declaration
void base::new() {

    // Defines the start of the opening tag for the class
    this.opens = "<base"

    // Defines the end of the opening tag for the class
    this.opene = ">"

    // Defines the closing tag for the class
    this.close = "</base>"

} // End of class constructor method definition

// Setter method for class arguments (appear between HTML tags)
class base scalar base::setClassArgs(| string scalar classarguments) {

    // Defines arguments that appear between HTML tags
    this.classargs = classarguments

    // Return a copy of the object
    return(this)

} // End of setter method for class arguments

// Specifies the base URL for all relative URLs in the page
class base scalar base::setHref(| string scalar methodarg) {

    // Set the attribute href for this class
    this.htmlhref = `" href=""' + methodarg + `"""'

    // Return a copy of the object
    return(this)

} // End of Method href declaration for class base

// Specifies the default target for all hyperlinks and forms in the page
class base scalar base::setTarget(| string scalar methodarg) {

    // Validate argument
    if (methodarg == "_blank" | methodarg == "_parent" | methodarg == "_self" | methodarg == "_top" | methodarg == "framename") {

        // Set the attribute value
        this.htmltarget = `" target=""' + methodarg + `"""'

    } // End IF Block for validated argument value

    // Return a copy of the object
    return(this)

} // End of Method target declaration for class base

// Getter method for opening bracket
string scalar base::getOpens() {

    // Returns the opening bracket/tag w/o > character to allow attributes
    return(this.opens)

} // End of getter method for opens member of class base

// Getter method for opening bracket closing character
string scalar base::getOpene() {

    // Returns the closing character for the opening bracket
    return(this.opene)

} // End of getter method for opene member of class base

// Getter method for closing bracket
string scalar base::getClose() {

    // Returns the closing bracket/tag
    return(this.close)

} // End of getter method for close member of class base

// Getter method for class arguments
string scalar base::getClassArgs() {

    // Returns the class arguments that appear between the HTML tags
    return(this.classargs)

} // End of getter method for class arguments member of class base

// Getter method for href member variable
string scalar base::getHref() {

    // Returns the href variable
    return(this.htmlhref)

} // End of getter method for href member of class base

// Getter method for target member variable
string scalar base::getTarget() {

    // Returns the target variable
    return(this.htmltarget)

} // End of getter method for target member of class base

// Get the HTML tag w/attributes and arguments
string scalar base::print() {

    // Create local variables to piece together return string
    string scalar open, args, close

    // Create opening string
    open = getOpens() + getHref() + getTarget() + globalAttrs() + getOpene()

    // Get class arguments
    args = getClassArgs()

    // Get closing tag
    close = getClose()

    // Return the complete HTML string
    return(char((10)) + subinstr(open, " >", ">") + args + close + char((10)))

} // End of print method for class base

// End of Mata session
end