Add a defaults button to the folder mapping dialog

Mapping the Exchange/Kerio special folders onto mailcow's by hand is
repetitive work that scales with the number of accounts. "By default"
maps Deleted Items to Trash, Junk E-mail to Junk, Sent Items to Sent and
unchecks Public Folders, which mailcow has no counterpart for.

The destination select only offered the source folder as a name to
create, so a target missing on the destination could not be selected at
all. It now also offers the current selection, and marks any name absent
from the destination as "(create)".

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

docker-compose-traefik.yml

@@ -8,7 +8,7 @@ services:
     volumes:
       - pgdata:/var/lib/postgresql
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U imap"]
+      test: ["CMD-SHELL", "pg_isready -U imap -d imapcopier"]
       interval: 5s
       timeout: 3s
       retries: 5

docker-compose.yml

@@ -8,7 +8,7 @@ services:
     volumes:
       - pgdata:/var/lib/postgresql
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U imap imapcopier"]
+      test: ["CMD-SHELL", "pg_isready -U imap -d imapcopier"]
       interval: 5s
       timeout: 3s
       retries: 5

internal/httpapi/endpoints.go

@@ -2,8 +2,11 @@ package httpapi
 
 import (
 	"encoding/json"
+	"errors"
+	"fmt"
 	"net/http"
 
+	"github.com/jackc/pgx/v5/pgconn"
 	"github.com/vasyansk/imap-copier/internal/store"
 )
 
@@ -54,6 +57,36 @@ func (s *Server) handleUpdateEndpoint(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusNoContent)
 }
 
+// handleDeleteEndpoint removes an endpoint that no task references. A referenced
+// endpoint is refused with 409 rather than a foreign-key error, and the same
+// status covers the race where a task is created between check and delete.
+func (s *Server) handleDeleteEndpoint(w http.ResponseWriter, r *http.Request) {
+	id, err := pathID(r, "id")
+	if err != nil {
+		http.Error(w, "bad id", http.StatusBadRequest)
+		return
+	}
+	used, err := s.store.CountTasksUsingEndpoint(r.Context(), id)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	if used > 0 {
+		http.Error(w, fmt.Sprintf("endpoint is used by %d task(s) — delete them first", used), http.StatusConflict)
+		return
+	}
+	if err := s.store.DeleteEndpoint(r.Context(), id); err != nil {
+		var pgErr *pgconn.PgError
+		if errors.As(err, &pgErr) && pgErr.Code == "23503" {
+			http.Error(w, "endpoint is used by a task — delete it first", http.StatusConflict)
+			return
+		}
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}
+
 func (s *Server) handleListEndpoints(w http.ResponseWriter, r *http.Request) {
 	eps, err := s.store.ListEndpoints(r.Context())
 	if err != nil {

internal/httpapi/router.go

@@ -15,6 +15,7 @@ func (s *Server) Router() http.Handler {
 	api.HandleFunc("GET /api/endpoints", s.handleListEndpoints)
 	api.HandleFunc("POST /api/endpoints", s.handleCreateEndpoint)
 	api.HandleFunc("PUT /api/endpoints/{id}", s.handleUpdateEndpoint)
+	api.HandleFunc("DELETE /api/endpoints/{id}", s.handleDeleteEndpoint)
 	api.HandleFunc("GET /api/tasks", s.handleListTasks)
 	api.HandleFunc("POST /api/tasks", s.handleCreateTask)
 	api.HandleFunc("GET /api/tasks/{id}", s.handleGetTask)

internal/store/crud_test.go

@@ -18,6 +18,41 @@ func TestUpdateEndpoint(t *testing.T) {
 	}
 }
 
+func TestDeleteEndpoint(t *testing.T) {
+	s := testStore(t)
+	ctx := context.Background()
+	id, _ := s.CreateEndpoint(ctx, Endpoint{RoleLabel: "src", Host: "a.com", Port: 993, TLSMode: "ssl"})
+	if err := s.DeleteEndpoint(ctx, id); err != nil {
+		t.Fatalf("delete: %v", err)
+	}
+	eps, _ := s.ListEndpoints(ctx)
+	if len(eps) != 0 {
+		t.Fatalf("endpoint not deleted: %d remain", len(eps))
+	}
+}
+
+func TestDeleteEndpointUsedByTaskRefused(t *testing.T) {
+	s := testStore(t)
+	ctx := context.Background()
+	ep1, _ := s.CreateEndpoint(ctx, Endpoint{RoleLabel: "s", Host: "a", Port: 993, TLSMode: "ssl"})
+	ep2, _ := s.CreateEndpoint(ctx, Endpoint{RoleLabel: "d", Host: "b", Port: 993, TLSMode: "ssl"})
+	if _, err := s.CreateTask(ctx, Task{Name: "t", SrcEndpointID: ep1, DstEndpointID: ep2}); err != nil {
+		t.Fatalf("create task: %v", err)
+	}
+	for _, id := range []int64{ep1, ep2} {
+		n, err := s.CountTasksUsingEndpoint(ctx, id)
+		if err != nil {
+			t.Fatalf("count: %v", err)
+		}
+		if n != 1 {
+			t.Fatalf("count for ep %d = %d, want 1", id, n)
+		}
+		if err := s.DeleteEndpoint(ctx, id); err == nil {
+			t.Fatalf("delete of referenced endpoint %d succeeded, want FK violation", id)
+		}
+	}
+}
+
 func TestDeleteAccountCascadesJournal(t *testing.T) {
 	s := testStore(t)
 	ctx := context.Background()

internal/store/endpoints.go

@@ -26,6 +26,23 @@ func (s *Store) UpdateEndpoint(ctx context.Context, e Endpoint) error {
 	return err
 }
 
+// CountTasksUsingEndpoint reports how many tasks reference the endpoint on
+// either side, so a delete can be refused with a meaningful message instead of
+// surfacing a raw foreign-key violation.
+func (s *Store) CountTasksUsingEndpoint(ctx context.Context, id int64) (int, error) {
+	var n int
+	err := s.Pool.QueryRow(ctx,
+		`SELECT count(*) FROM tasks WHERE src_endpoint_id=$1 OR dst_endpoint_id=$1`, id).Scan(&n)
+	return n, err
+}
+
+// DeleteEndpoint removes an endpoint. Tasks reference endpoints without ON
+// DELETE CASCADE, so Postgres rejects the delete while any task still uses it.
+func (s *Store) DeleteEndpoint(ctx context.Context, id int64) error {
+	_, err := s.Pool.Exec(ctx, `DELETE FROM endpoints WHERE id=$1`, id)
+	return err
+}
+
 func (s *Store) GetEndpoint(ctx context.Context, id int64) (Endpoint, error) {
 	var e Endpoint
 	err := s.Pool.QueryRow(ctx,

web/src/api.ts

@@ -82,6 +82,8 @@ export const updateEndpoint = (
   body: { role_label: string; host: string; port: number; tls_mode: TLSMode },
 ) => api(`/api/endpoints/${id}`, { ...jsonBody(body), method: 'PUT' })
 
+export const deleteEndpoint = (id: number) => api(`/api/endpoints/${id}`, { method: 'DELETE' })
+
 export const deleteTask = (id: number) => api(`/api/tasks/${id}`, { method: 'DELETE' })
 
 export const deleteAccount = (taskId: number, accountId: number) =>

web/src/app.css

@@ -488,11 +488,23 @@
   cursor: pointer;
 }
 
+.map-toolbar {
+  display: flex;
+  align-items: center;
+  gap: 14px;
+  margin-bottom: 12px;
+  flex-wrap: wrap;
+}
+
+.map-toolbar .btn {
+  padding: 6px 12px;
+  font-size: 11px;
+}
+
 .map-all {
   display: flex;
   align-items: center;
   gap: 8px;
-  margin-bottom: 12px;
   font-size: 11px;
   text-transform: uppercase;
   letter-spacing: 0.08em;
@@ -905,11 +917,24 @@ table.tbl a.rowlink:hover {
 
 .upload-row {
   display: flex;
-  align-items: center;
+  align-items: flex-start;
   gap: 12px;
   flex-wrap: wrap;
 }
 
+/* One import route per column: the action on top, its sample file underneath. */
+.upload-item {
+  display: flex;
+  flex-direction: column;
+  align-items: stretch;
+  gap: 6px;
+}
+
+.upload-item .link-btn {
+  align-self: center;
+  text-align: center;
+}
+
 .file-btn {
   position: relative;
   overflow: hidden;

web/src/components/FolderMappingModal.tsx

@@ -20,6 +20,21 @@ function defaultDst(src: string, dstFolders: string[], initial: Record<string, s
   return src
 }
 
+// Exchange/Kerio special folders and their mailcow counterparts. Keyed by the
+// lowercased source name so casing differences between servers don't matter.
+const DEFAULT_TARGETS: Record<string, string> = {
+  'deleted items': 'Trash',
+  'deleted messages': 'Trash',
+  'junk e-mail': 'Junk',
+  'junk email': 'Junk',
+  spam: 'Junk',
+  'sent items': 'Sent',
+  'sent messages': 'Sent',
+}
+
+// Source folders with no counterpart on mailcow — unchecked by the defaults.
+const DEFAULT_EXCLUDED = new Set(['public folders'])
+
 export function FolderMappingModal({
   open, srcFolders, dstFolders, initialMapping, initialExcluded, accountLabel, onConfirm, onCancel,
 }: Props) {
@@ -31,16 +46,40 @@ export function FolderMappingModal({
 
   // Options per select: all destination folders, plus the source name itself
   // (marked "create") when it does not already exist on the destination.
+  const valueFor = (src: string) => choice[src] ?? defaultDst(src, dstFolders, initialMapping)
+
+  // Options per select: all destination folders, plus any name not present there
+  // — the source folder itself and the current selection — marked "create".
   const options = useMemo(() => {
     const set = new Set(dstFolders)
-    return (src: string) => {
+    return (src: string, current: string) => {
       const opts = [...dstFolders]
-      if (!set.has(src)) opts.unshift(src)
+      if (!set.has(current)) opts.unshift(current)
+      if (!set.has(src) && src !== current) opts.unshift(src)
       return opts
     }
   }, [dstFolders])
 
-  const valueFor = (src: string) => choice[src] ?? defaultDst(src, dstFolders, initialMapping)
+  // Collapse the Exchange/Kerio folder layout onto mailcow's in one click: the
+  // per-account mapping is otherwise repetitive work when importing many users.
+  function applyDefaults() {
+    const nextChoice = { ...choice }
+    const nextSynced = { ...synced }
+    for (const src of srcFolders) {
+      const key = src.trim().toLowerCase()
+      if (DEFAULT_EXCLUDED.has(key)) {
+        nextSynced[src] = false
+        continue
+      }
+      const target = DEFAULT_TARGETS[key]
+      if (target) {
+        nextChoice[src] = target
+        nextSynced[src] = true
+      }
+    }
+    setChoice(nextChoice)
+    setSynced(nextSynced)
+  }
 
   function confirm() {
     const mapping: Record<string, string> = {}
@@ -70,6 +109,15 @@ export function FolderMappingModal({
           Route each source folder to an existing destination folder. Leaving a folder mapped to its own name
           creates it on the destination if missing (e.g. map <code>Спам</code> → <code>Spam</code> to avoid duplicates).
         </p>
+        <div className="map-toolbar">
+          <button
+            type="button"
+            className="btn btn-ghost"
+            onClick={applyDefaults}
+            title="Map Deleted Items → Trash, Junk E-mail → Junk, Sent Items → Sent and skip Public Folders"
+          >
+            By default
+          </button>
           <label className="map-all">
             <input
               type="checkbox"
@@ -81,6 +129,7 @@ export function FolderMappingModal({
             />
             sync all folders
           </label>
+        </div>
         <div className="map-grid">
           {srcFolders.map((src) => {
             const on = synced[src] !== false
@@ -107,10 +156,10 @@ export function FolderMappingModal({
                   disabled={!on}
                   onChange={(e) => setChoice((c) => ({ ...c, [src]: e.target.value }))}
                 >
-                  {options(src).map((f) => (
+                  {options(src, val).map((f) => (
                     <option key={f} value={f}>
                       {f}
-                      {f === src && !dstFolders.includes(src) ? ' (create)' : ''}
+                      {dstFolders.includes(f) ? '' : ' (create)'}
                     </option>
                   ))}
                 </select>

web/src/pages/Endpoints.tsx

@@ -1,5 +1,6 @@
 import { useEffect, useState, type FormEvent } from 'react'
-import { createEndpoint, listEndpoints, updateEndpoint, type Endpoint, type TLSMode } from '../api'
+import { createEndpoint, deleteEndpoint, listEndpoints, updateEndpoint, type Endpoint, type TLSMode } from '../api'
+import { useConfirm } from '../components/ConfirmProvider'
 
 const emptyForm = { role_label: '', host: '', port: '993', tls_mode: 'ssl' as TLSMode }
 
@@ -9,6 +10,7 @@ export function Endpoints() {
   const [editingId, setEditingId] = useState<number | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [busy, setBusy] = useState(false)
+  const confirm = useConfirm()
 
   function startEdit(ep: Endpoint) {
     setEditingId(ep.id)
@@ -29,6 +31,25 @@ export function Endpoints() {
 
   useEffect(reload, [])
 
+  async function onDelete(ep: Endpoint) {
+    const ok = await confirm({
+      title: 'Delete endpoint',
+      message: `Delete endpoint "${ep.role_label}" (${ep.host}:${ep.port})?`,
+      confirmLabel: 'Delete',
+      danger: true,
+    })
+    if (!ok) return
+    setError(null)
+    try {
+      await deleteEndpoint(ep.id)
+      // The form still edits a row that no longer exists — drop back to create mode.
+      if (editingId === ep.id) cancelEdit()
+      reload()
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Failed to delete endpoint')
+    }
+  }
+
   async function submit(e: FormEvent) {
     e.preventDefault()
     setBusy(true)
@@ -159,6 +180,9 @@ export function Endpoints() {
                       <td className="num-cell">
                         <button type="button" className="link-btn" onClick={() => startEdit(ep)} disabled={busy}>
                           edit
+                        </button>{' '}
+                        <button type="button" className="link-btn danger" onClick={() => onDelete(ep)} disabled={busy}>
+                          delete
                         </button>
                       </td>
                     </tr>

web/src/pages/TaskDetail.tsx

@@ -260,18 +260,38 @@ export function TaskDetail({ id }: { id: number }) {
     }
   }
 
+  function downloadCSV(name: string, content: string) {
+    const url = URL.createObjectURL(new Blob([content], { type: 'text/csv' }))
+    const a = document.createElement('a')
+    a.href = url
+    a.download = name
+    a.click()
+    URL.revokeObjectURL(url)
+  }
+
+  // Plain import: comma-separated, no header, src_login,src_pass,dst_login,dst_pass.
   function downloadExampleCSV() {
-    const sample = [
+    const sample =
+      [
         'alice@source.example,SrcPass1,alice@dest.example,DstPass1',
         'bob@source.example,SrcPass2,bob@dest.example,DstPass2',
         'carol@source.example,SrcPass3,carol@dest.example,DstPass3',
       ].join('\n') + '\n'
-    const url = URL.createObjectURL(new Blob([sample], { type: 'text/csv' }))
+    downloadCSV('imap-copier-accounts-example.csv', sample)
-    const a = document.createElement('a')
+  }
-    a.href = url
+
-    a.download = 'imap-copier-accounts-example.csv'
+  // Kerio Connect export: semicolon-separated with a Name;FullName;Description;Enable
-    a.click()
+  // header. The password lives in Description; disabled rows and admin are skipped
-    URL.revokeObjectURL(url)
+  // on import, and the domain is supplied in the import dialog.
+  function downloadKerioExampleCSV() {
+    const sample =
+      [
+        'Name;FullName;Description;Enable',
+        'alice;Alice Smith;SrcPass1;Yes',
+        'bob;Bob Jones;SrcPass2;Yes',
+        'carol;Carol White (disabled, skipped);SrcPass3;No',
+      ].join('\n') + '\n'
+    downloadCSV('kerio-users-example.csv', sample)
   }
 
   async function onFileChosen(e: ChangeEvent<HTMLInputElement>) {
@@ -556,17 +576,24 @@ export function TaskDetail({ id }: { id: number }) {
 
           <div className="divider-label">or bulk import</div>
           <div className="upload-row">
+            <div className="upload-item">
               <label className={`btn file-btn${busy !== null ? ' is-disabled' : ''}`}>
                 {busy === 'import' ? 'Importing…' : 'Upload CSV'}
                 <input ref={fileInputRef} type="file" accept=".csv,text/csv" onChange={onFileChosen} disabled={busy !== null} />
               </label>
-            <button type="button" className="btn" onClick={() => setKerioOpen(true)} disabled={busy !== null}>
-              Import from Kerio
-            </button>
               <button type="button" className="link-btn" onClick={downloadExampleCSV}>
                 download example.csv
               </button>
             </div>
+            <div className="upload-item">
+              <button type="button" className="btn" onClick={() => setKerioOpen(true)} disabled={busy !== null}>
+                Import from Kerio
+              </button>
+              <button type="button" className="link-btn" onClick={downloadKerioExampleCSV}>
+                download kerio example.csv
+              </button>
+            </div>
+          </div>
         </div>
 
         <div className="panel">