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package serde
import (
"mime"
"sort"
"strconv"
"strings"
"github.com/google/jsonapi"
)
type MediaType string
const (
JSONAPI MediaType = jsonapi.MediaType
JSON MediaType = "application/json"
Text MediaType = "text/plain"
YAML MediaType = "application/yaml"
Default MediaType = JSON
)
func (self MediaType) String() string {
return string(self)
}
func MediaTypeFor(value string) MediaType {
mediaTypes := sortedByQualityValues(strings.Split(value, ","))
for _, mediaType := range mediaTypes {
switch mediaType {
case jsonapi.MediaType:
return JSONAPI
case "application/json":
return JSON
case "text/plain":
return Text
default:
continue
}
}
return Default
}
func sortedByQualityValues(mimeTypes []string) []string {
weights := map[string]float64{}
valid := []string{}
for i, mimeType := range mimeTypes {
if mtype, params, err := mime.ParseMediaType(mimeType); err == nil {
valid = append(valid, mtype)
if _, ok := weights[mtype]; !ok {
weights[mtype] = 1.0 - (0.1 * float64(i))
}
if quality, ok := params["q"]; ok {
if val, err := strconv.ParseFloat(quality, 64); err == nil {
weights[mtype] = val
}
}
}
}
sort.Slice(valid, func(x, y int) bool {
xWeight := weights[valid[x]]
yWeight := weights[valid[y]]
return xWeight > yWeight
})
return valid
}
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