Convert from BoltDB to Maildir storage for emails

internal/imap/uidlist/entry.go

@@ -0,0 +1,65 @@
+package uidlist
+
+import (
+	"errors"
+	"fmt"
+	"strings"
+)
+
+type Entry struct {
+	UID               uint64
+	Extra             map[string][]string
+	LastKnownFilename string
+}
+
+func ParseEntry(line string) (Entry, error) {
+	var out Entry
+
+	parts := strings.SplitN(strings.TrimSpace(line), ":", 2)
+	if len(parts) != 2 {
+		return out, errors.New("Couldn't find start of filename")
+	}
+
+	attrs := strings.Split(parts[0], " ")
+	if len(attrs) == 0 {
+		return out, errors.New("Couldn't find UID")
+	}
+
+	if err := setUint64(attrs[0], &out.UID); err != nil {
+		return out, err
+	}
+
+	out.Extra = make(map[string][]string)
+	// FIXME: this is all disturbingly similar to header.go
+	for _, attr := range attrs[1:] {
+		if len(attr) == 0 {
+			continue
+		}
+
+		key := attr[0:1]
+		value := attr[1:]
+		out.Extra[key] = append(out.Extra[key], value)
+	}
+
+	out.LastKnownFilename = parts[1]
+
+	return out, nil
+}
+
+func (e *Entry) Key() string {
+	parts := strings.SplitN(e.LastKnownFilename, ":", 2)
+
+	return parts[0]
+}
+
+func (e *Entry) String() string {
+	// FIXME: also disturbingly similar to header.go
+	var sb strings.Builder
+	fmt.Fprintf(&sb, "%d", e.UID)
+	for k, v := range e.Extra {
+		fmt.Fprintf(&sb, " %s%s", k, v)
+	}
+	fmt.Fprintf(&sb, " :%s", e.LastKnownFilename)
+
+	return sb.String()
+}