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|
package middleware
import (
"fmt"
"strings"
"sync"
"git.sr.ht/~rjarry/aerc/worker/types"
)
type folderMapper struct {
sync.Mutex
types.WorkerInteractor
fm folderMap
table map[string]string
}
func NewFolderMapper(base types.WorkerInteractor, mapping map[string]string,
order []string,
) types.WorkerInteractor {
base.Infof("loading worker middleware: foldermapper")
return &folderMapper{
WorkerInteractor: base,
fm: folderMap{mapping, order},
table: make(map[string]string),
}
}
func (f *folderMapper) Unwrap() types.WorkerInteractor {
return f.WorkerInteractor
}
func (f *folderMapper) incoming(msg types.WorkerMessage, dir string) string {
f.Lock()
defer f.Unlock()
mapped, ok := f.table[dir]
if !ok {
return dir
}
return mapped
}
func (f *folderMapper) outgoing(msg types.WorkerMessage, dir string) string {
f.Lock()
defer f.Unlock()
for k, v := range f.table {
if v == dir {
mapped := k
return mapped
}
}
return dir
}
func (f *folderMapper) store(s string) {
f.Lock()
defer f.Unlock()
display := f.fm.Apply(s)
f.table[display] = s
f.Tracef("store display folder '%s' to '%s'", display, s)
}
func (f *folderMapper) create(s string) (string, error) {
f.Lock()
defer f.Unlock()
backend := createFolder(f.table, s)
if _, exists := f.table[s]; exists {
return s, fmt.Errorf("folder already exists: %s", s)
}
f.table[s] = backend
f.Tracef("create display folder '%s' as '%s'", s, backend)
return backend, nil
}
func (f *folderMapper) ProcessAction(msg types.WorkerMessage) types.WorkerMessage {
switch msg := msg.(type) {
case *types.CheckMail:
for i := range msg.Directories {
msg.Directories[i] = f.incoming(msg, msg.Directories[i])
}
case *types.CopyMessages:
msg.Destination = f.incoming(msg, msg.Destination)
case *types.AppendMessage:
msg.Destination = f.incoming(msg, msg.Destination)
case *types.MoveMessages:
msg.Destination = f.incoming(msg, msg.Destination)
case *types.CreateDirectory:
var err error
msg.Directory, err = f.create(msg.Directory)
if err != nil {
f.Errorf("error creating new directory: %v", err)
}
case *types.RemoveDirectory:
msg.Directory = f.incoming(msg, msg.Directory)
case *types.OpenDirectory:
msg.Directory = f.incoming(msg, msg.Directory)
}
return f.WorkerInteractor.ProcessAction(msg)
}
func (f *folderMapper) PostMessage(msg types.WorkerMessage, cb func(m types.WorkerMessage)) {
switch msg := msg.(type) {
case *types.Done:
switch msg := msg.InResponseTo().(type) {
case *types.CheckMail:
for i := range msg.Directories {
msg.Directories[i] = f.outgoing(msg, msg.Directories[i])
}
case *types.CopyMessages:
msg.Destination = f.outgoing(msg, msg.Destination)
case *types.AppendMessage:
msg.Destination = f.outgoing(msg, msg.Destination)
case *types.MoveMessages:
msg.Destination = f.outgoing(msg, msg.Destination)
case *types.CreateDirectory:
msg.Directory = f.outgoing(msg, msg.Directory)
case *types.RemoveDirectory:
msg.Directory = f.outgoing(msg, msg.Directory)
case *types.OpenDirectory:
msg.Directory = f.outgoing(msg, msg.Directory)
}
case *types.CheckMailDirectories:
for i := range msg.Directories {
msg.Directories[i] = f.outgoing(msg, msg.Directories[i])
}
case *types.Directory:
f.store(msg.Dir.Name)
msg.Dir.Name = f.outgoing(msg, msg.Dir.Name)
case *types.DirectoryInfo:
msg.Info.Name = f.outgoing(msg, msg.Info.Name)
}
f.WorkerInteractor.PostMessage(msg, cb)
}
// folderMap contains the mapping between the ui and backend folder names
type folderMap struct {
mapping map[string]string
order []string
}
// Apply applies the mapping from the folder map to the backend folder
func (f *folderMap) Apply(s string) string {
for _, k := range f.order {
v := f.mapping[k]
strict := true
if strings.HasSuffix(v, "*") {
v = strings.TrimSuffix(v, "*")
strict = false
}
if (strings.HasPrefix(s, v) && !strict) || (s == v && strict) {
term := strings.TrimPrefix(s, v)
if strings.Contains(k, "*") && !strict {
prefix := k
for strings.Contains(prefix, "**") {
prefix = strings.ReplaceAll(prefix, "**", "*")
}
s = strings.Replace(prefix, "*", term, 1)
} else {
s = k + term
}
}
}
return s
}
// createFolder reverses the mapping of a new folder name
func createFolder(table map[string]string, s string) string {
max, key := 0, ""
for k := range table {
if strings.HasPrefix(s, k) && len(k) > max {
max, key = len(k), k
}
}
if max > 0 && key != "" {
s = table[key] + strings.TrimPrefix(s, key)
}
return s
}
|
