Add emoji data source

cmd/generateEmojiCodeMap/emoji_data.go

@@ -0,0 +1,64 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"strconv"
+	"strings"
+)
+
+const emojiDataJsonURL = "https://github.com/iamcal/emoji-data/raw/master/emoji.json"
+
+// EmojiData json parse struct
+type EmojiData struct {
+	Unified   string `json:"unified"`
+	ShortName string `json:"short_name"`
+}
+
+// UnifiedToChar renders a character from its hexadecimal codepoint
+func UnifiedToChar(unified string) (string, error) {
+	codes := strings.Split(unified, "-")
+	var sb strings.Builder
+	for _, code := range codes {
+		s, err := strconv.ParseInt(code, 16, 32)
+		if err != nil {
+			return "", err
+		}
+		sb.WriteRune(rune(s))
+	}
+	return sb.String(), nil
+}
+
+func createEmojiDataCodeMap() (map[string]string, error) {
+	res, err := http.Get(emojiDataJsonURL)
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+
+	emojiFile, err := ioutil.ReadAll(res.Body)
+	if err != nil {
+		return nil, err
+	}
+
+	var data []EmojiData
+	if err := json.Unmarshal(emojiFile, &data); err != nil {
+		return nil, err
+	}
+
+	emojiCodeMap := make(map[string]string)
+	for _, emoji := range data {
+		if len(emoji.ShortName) == 0 || len(emoji.Unified) == 0 {
+			continue
+		}
+		code, err := UnifiedToChar(emoji.Unified)
+		if err != nil {
+			return nil, err
+		}
+		emojiCodeMap[emoji.ShortName] = fmt.Sprintf("%+q", strings.ToLower(code))
+	}
+
+	return emojiCodeMap, nil
+}

cmd/generateEmojiCodeMap/main.go

@@ -16,8 +16,8 @@ var fileName string
 func init() {
 	log.SetFlags(log.Llongfile)
 
-	flag.StringVar(&pkgName, "pkg", "main", "output package")
-	flag.StringVar(&fileName, "o", "emoji_codemap.go", "output file")
+	flag.StringVar(&pkgName, "pkg", "emoji", "output package")
+	flag.StringVar(&fileName, "o", "../../emoji_codemap.go", "output file")
 	flag.Parse()
 }
 
@@ -42,11 +42,13 @@ var emojiCodeMap = map[string]string{
 `
 
 func createCodeMap() (map[string]string, error) {
+	log.Printf("creating gemoji code map")
 	gemojiCodeMap, err := createGemojiCodeMap()
 	if err != nil {
 		return nil, err
 	}
 
+	log.Printf("creating emojo code map")
 	emojoCodeMap, err := createEmojoCodeMap()
 	if err != nil {
 		return nil, err
@@ -55,6 +57,7 @@ func createCodeMap() (map[string]string, error) {
 		gemojiCodeMap[k] = v
 	}
 
+	log.Printf("creating unicode code map")
 	unicodeorgCodeMap, err := createUnicodeorgMap()
 	if err != nil {
 		return nil, err
@@ -63,6 +66,15 @@ func createCodeMap() (map[string]string, error) {
 		gemojiCodeMap[k] = v
 	}
 
+	log.Printf("creating emoji code map")
+	emojiDataCodeMap, err := createEmojiDataCodeMap()
+	if err != nil {
+		return nil, err
+	}
+	for k, v := range emojiDataCodeMap {
+		gemojiCodeMap[k] = v
+	}
+
 	return gemojiCodeMap, nil
 }
 
@@ -79,7 +91,7 @@ func createCodeMapSource(pkgName string, emojiCodeMap map[string]string) ([]byte
 
 	bts, err := format.Source(buf.Bytes())
 	if err != nil {
-		fmt.Printf(string(buf.Bytes()))
+		fmt.Print(buf.String())
 		return nil, fmt.Errorf("gofmt: %s", err)
 	}