package webmention

import "willnorris.com/go/microformats"

// Go stuff: entry.Properties["name"][0].(string),
// JS stuff: hEntry.properties?.name?.[0]
// The problem: convoluted syntax and no optional chaining!
func mfstr(mf *microformats.Microformat, key string) string {
	val := mf.Properties[key]
	if len(val) == 0 {
		return ""
	}

	str, ok := val[0].(string)
	if !ok {
		// in very weird cases, it could be a map holding a value, like in mf2's "photo"
		valMap, ok2 := val[0].(map[string]string)
		if !ok2 {
			str = ""
		}
		str = valMap["value"]
	}

	return str
}

func mfmap(mf *microformats.Microformat, key string) map[string]string {
	val := mf.Properties[key]
	if len(val) == 0 {
		return map[string]string{}
	}
	mapVal, ok := val[0].(map[string]string)
	if !ok {
		return map[string]string{}
	}
	return mapVal
}

func mfprop(mf *microformats.Microformat, key string) *microformats.Microformat {
	val := mf.Properties[key]
	if len(val) == 0 {
		return &microformats.Microformat{
			Properties: map[string][]interface{}{},
		}
	}
	return val[0].(*microformats.Microformat)
}