// Switch to Mata interpreter/compiler
mata:

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

// Definition of HTML Tag meta Mata Class
// Defines metadata about an HTML document// Information retrieved from http://www.w3schools.com/tags/tag_meta.asp
class meta extends htmlglobal {

    // Define private member variables
    private:

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

    // String scalar attributes
    string               scalar          htmlcharset, htmlcontent, htmlhttp_equiv, htmlname, htmlscheme

    // 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        meta     scalar  setClassArgs(), setCharset(), setContent(), setHttp_Equiv(), setName(), setScheme()

    // Getter methods
    string               scalar          getOpens(), getOpene(), getClose(), print(), getClassArgs(), getCharset(), getContent(), getHttp_Equiv(), getName(), getScheme()

} // End of class declaration

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

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

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

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

} // End of class constructor method definition

// Setter method for class arguments (appear between HTML tags)
class meta scalar meta::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 character encoding for the HTML document
class meta scalar meta::setCharset(| string scalar methodarg) {

    // Set the attribute charset for this class
    this.htmlcharset = `" charset=""' + methodarg + `"" "'

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

} // End of Method charset declaration for class meta

// Gives the value associated with the http-equiv or name attribute
class meta scalar meta::setContent(| string scalar methodarg) {

    // Set the attribute content for this class
    this.htmlcontent = `" content=""' + methodarg + `"" "'

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

} // End of Method content declaration for class meta

// Provides an HTTP header for the information/value of the content attribute
class meta scalar meta::setHttp_Equiv(| string scalar methodarg) {

    // Validate argument
    if (methodarg == "content-type" | methodarg == "default-style" | methodarg == "refresh") {

        // Set the attribute value
        this.htmlhttp_equiv = `" http-equiv=""' + methodarg + `"" "'

    } // End IF Block for validated argument value

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

} // End of Method http_equiv declaration for class meta

// Specifies a name for the metadata
class meta scalar meta::setName(| string scalar methodarg) {

	// Set the attribute value
	this.htmlname = `" name=""' + methodarg + `"" "'

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

} // End of Method name declaration for class meta

// Not supported in HTML5.Specifies a scheme to be used to interpret the value of the content attribute
class meta scalar meta::setScheme(| string scalar methodarg) {

    // Set the attribute scheme for this class
    this.htmlscheme = `" scheme=""' + methodarg + `"" "'

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

} // End of Method scheme declaration for class meta

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

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

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

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

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

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

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

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

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

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

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

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

// Getter method for charset member variable
string scalar meta::getCharset() {

    // Returns the charset variable
    return(this.htmlcharset)

} // End of getter method for charset member of class meta

// Getter method for content member variable
string scalar meta::getContent() {

    // Returns the content variable
    return(this.htmlcontent)

} // End of getter method for content member of class meta

// Getter method for http_equiv member variable
string scalar meta::getHttp_Equiv() {

    // Returns the http_equiv variable
    return(this.htmlhttp_equiv)

} // End of getter method for http_equiv member of class meta

// Getter method for name member variable
string scalar meta::getName() {

    // Returns the name variable
    return(this.htmlname)

} // End of getter method for name member of class meta

// Getter method for scheme member variable
string scalar meta::getScheme() {

    // Returns the scheme variable
    return(this.htmlscheme)

} // End of getter method for scheme member of class meta

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

    // Create local variables to piece together return string
    string scalar open

    // Create opening string
    open = getOpens() + getCharset() + getContent() + getHttp_Equiv() + getName() + getScheme() + globalAttrs() + getOpene()

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

} // End of print method for class meta

// End of Mata session
end