groupware: move prefixed writer into export_integration_test.go + upgrade integration tests to Stalwart 0.16.8 + update Stalwart configuration to include necessary default roles

pkg/jmap/export_prefixed_writer_test.go

@@ -1,62 +0,0 @@
-package jmap
-
-import (
-	"bytes"
-)
-
-// LogLineWriter captures data chunk by chunk, extracts full lines,
-// and passes them directly to log.Printf.
-type LogLineWriter struct {
-	buf     bytes.Buffer
-	printer func(string)
-	lines   *[]string
-}
-
-// NewLogLineWriter initializes the writer with a specific prefix.
-func NewLogLineWriter(printer func(string), lines *[]string) *LogLineWriter {
-	return &LogLineWriter{printer: printer, lines: lines}
-}
-
-// Write intercepts the byte stream and looks for complete text lines.
-func (w *LogLineWriter) Write(p []byte) (n int, err error) {
-	w.buf.Write(p)
-
-	for {
-		bufferedBytes := w.buf.Bytes()
-		idx := bytes.IndexByte(bufferedBytes, '\n')
-		if idx == -1 {
-			break // Line is incomplete; wait for more data
-		}
-
-		// Slice UP TO the newline (idx), omitting the '\n' itself.
-		// Go's log package handles its own line-endings.
-		line := bufferedBytes[:idx]
-
-		// Emit to log.Printf. Using %s works perfectly with []byte
-		// without forcing an expensive string allocation.
-		s := string(line)
-		w.printer(s)
-		if w.lines != nil {
-			*w.lines = append(*w.lines, s)
-		}
-
-		// Advance the buffer past the processed text AND the '\n' (idx + 1)
-		w.buf.Next(idx + 1)
-	}
-
-	return len(p), nil
-}
-
-// Flush ensures that any lingering text without a trailing newline
-// gets safely pushed out to the log before exit.
-func (w *LogLineWriter) Flush() error {
-	if w.buf.Len() > 0 {
-		s := w.buf.String()
-		w.printer(s)
-		if w.lines != nil {
-			*w.lines = append(*w.lines, s)
-		}
-		w.buf.Reset()
-	}
-	return nil
-}