package atom

import (
	"fmt"
)

type PlainText struct {
	*CommonAttributes
	Type string `xml:"type,attr,omitempty"` // Must be text or html
	Text string `xml:",chardata"`
}

// isText checks whether the PlainText is a Text. It returns a bool.
func (p *PlainText) isText() bool { return true }

// newPlainText creates a new PlainText. It returns a *PlainText.
func newPlainText(textType, content string) *PlainText {
	return &PlainText{
		CommonAttributes: NewCommonAttributes(),
		Type:             textType,
		Text:             content,
	}
}

// Check checks the PlainText for incompatibilities with RFC4287. It returns an
// error.
func (p *PlainText) Check() error {
	if p.Type != "" && p.Type != "text" && p.Type != "html" {
		return fmt.Errorf("type attribute of plain text %v must be text or html if not omitted", p)
	}

	if p.Type == "html" && !isCorrectlyEscaped(p.Text) {
		return fmt.Errorf("text element of plain text %v not correctly escaped", p)
	}

	if p.Text == "" {
		return fmt.Errorf("text element of plain text %v empty", p)
	}

	return nil
}