feat: add log & supporting packages

internal/textio/api.go

@@ -0,0 +1,70 @@
+package textio
+
+import (
+	"errors"
+	"net/url"
+	"runtime"
+	"strings"
+
+	"github.com/fumiama/tienyik"
+)
+
+func API() string {
+	pc, f, _, ok := runtime.Caller(1)
+	if !ok {
+		panic("cannot get api of caller")
+	}
+	if strings.Contains(f, "\\") {
+		f = strings.ReplaceAll(f, "\\", "/")
+	}
+	_, p, ok := strings.Cut(f, "/tienyik/")
+	if !ok {
+		panic("cannot cut api " + f + " of caller")
+	}
+	f = strings.TrimSuffix(p, ".go")
+	fn := runtime.FuncForPC(pc)
+	if fn == nil {
+		panic("cannot get func name of caller, api: " + f)
+	}
+	p = fn.Name()
+	i := strings.LastIndex(p, ".")
+	if i < 0 {
+		panic("func name of caller '" + p + " has no '.', api: " + f)
+	}
+	p = p[i+1:]
+	if len(p) <= 1 {
+		panic("func name of caller '" + p + " too short', api: " + f)
+	}
+	sb := strings.Builder{}
+	sb.WriteString(f)
+	sb.WriteByte('/')
+	sb.WriteString(strings.ToLower(p[:1]))
+	sb.WriteString(p[1:])
+	return sb.String()
+}
+
+func EUrlParams(tya *tienyik.AES, params url.Values) string {
+	return url.Values{
+		FuncName(1, true): {BytesToString(tya.Encrypt(
+			StringToBytes(params.Encode()),
+		))},
+	}.Encode()
+}
+
+func ParseQuery(tya *tienyik.AES, eparams string) (url.Values, error) {
+	q, err := url.ParseQuery(eparams)
+	if err != nil {
+		return nil, err
+	}
+	if len(q) != 1 {
+		return nil, errors.New("len(q) must be 1")
+	}
+	for _, v := range q {
+		dec, err := tya.Decrypt(StringToBytes(v[0]))
+		if err != nil {
+			return nil, err
+		}
+		return url.ParseQuery(BytesToString(dec))
+	}
+	panic("unexpected")
+}