Add quoting from

krabdb/quote.go

@@ -1,7 +1,11 @@
 package krabdb
 
 import (
+	"encoding/hex"
+	"fmt"
+	"strconv"
 	"strings"
+	"time"
 
 	"github.com/jackc/pgx/v4"
 )
@@ -37,5 +41,24 @@ func QuoteIdentStrings(in []string) []string {
 
 // Quote escapes values in PG.
 func Quote(o interface{}) string {
-	panic("Quote not implemented")
+	switch o := o.(type) {
+	case nil:
+		return "null"
+	case int64:
+		return strconv.FormatInt(o, 10)
+	case uint64:
+		return strconv.FormatUint(o, 10)
+	case float64:
+		return strconv.FormatFloat(o, 'f', -1, 64)
+	case bool:
+		return strconv.FormatBool(o)
+	case []byte:
+		return `'\x` + hex.EncodeToString(o) + "'"
+	case string:
+		return "'" + strings.ReplaceAll(o, "'", "''") + "'"
+	case time.Time:
+		return o.Truncate(time.Microsecond).Format("'2006-01-02 15:04:05.999999999Z07:00:00'")
+	default:
+		panic(fmt.Sprintf("Quote not implemented for type %T", o))
+	}
 }

krabdb/quote_test.go

@@ -0,0 +1,36 @@
+package krabdb
+
+import (
+	"testing"
+	"time"
+)
+
+func TestQuote(t *testing.T) {
+	testCases := []struct {
+		given    interface{}
+		expected string
+	}{
+		{nil, "null"},
+		{int64(420), "420"},
+		{uint64(420), "420"},
+		{float64(42.1), "42.1"},
+		{true, "true"},
+		{false, "false"},
+		{[]byte{255, 128, 0}, `'\xff8000'`},
+		{`krab`, `'krab'`},
+		{`oh'krab`, `'oh''krab'`},
+		{`oh\'krab`, `'oh\''krab'`},
+		{
+			time.Date(2020, time.March, 1, 23, 59, 59, 999999999, time.UTC),
+			`'2020-03-01 23:59:59.999999Z'`,
+		},
+	}
+
+	for i, tc := range testCases {
+		actual := Quote(tc.given)
+
+		if tc.expected != actual {
+			t.Errorf("[%d] expected %s, but got %s", i, tc.expected, actual)
+		}
+	}
+}