templates: add .AccountBackend

It's useful to know what the current account's backend is, especially if
one has multiple configs where the same account name might use
a different backend. Add AccountBackend to templates.

Changelog-added: Added `{{.AccountBackend}}` to templates.
Signed-off-by: Bence Ferdinandy <bence@ferdinandy.com>
Acked-by: Robin Jarry <robin@jarry.cc>

5 files changed, 36 insertions, 1 deletions

diff --git a/config/accounts.go b/config/accounts.go
index 4d1d60bf..77afa0f9 100644
--- a/config/accounts.go
+++ b/config/accounts.go
@@ -69,7 +69,8 @@ func (c *RemoteConfig) ConnectionString() (string, error) {
 }
 
 type AccountConfig struct {
-	Name string
+	Name    string
+	Backend string
 	// backend specific
 	Params map[string]string
 
@@ -247,6 +248,8 @@ func ParseAccountConfig(name string, section *ini.Section) (*AccountConfig, erro
 	if account.Source == "" {
 		return nil, fmt.Errorf("missing 'source' parameter")
 	}
+
+	account.Backend = parseBackend(account.Source)
 	if account.From == nil {
 		return nil, fmt.Errorf("missing 'from' parameter")
 	}
@@ -269,6 +272,23 @@ func ParseAccountConfig(name string, section *ini.Section) (*AccountConfig, erro
 	return &account, nil
 }
 
+func parseBackend(source string) string {
+	u, err := url.Parse(source)
+	if err != nil {
+		return ""
+	}
+	if strings.HasPrefix(u.Scheme, "imap") {
+		return "imap"
+	}
+	if strings.HasPrefix(u.Scheme, "maildir") {
+		return "maildir"
+	}
+	if strings.HasPrefix(u.Scheme, "jmap") {
+		return "jmap"
+	}
+	return u.Scheme
+}
+
 func (a *AccountConfig) ParseSource(sec *ini.Section, key *ini.Key) (string, error) {
 	var remote RemoteConfig
 	remote.Value = key.String()
diff --git a/config/templates.go b/config/templates.go
index edcd3abb..5a38cd61 100644
--- a/config/templates.go
+++ b/config/templates.go
@@ -65,6 +65,7 @@ var (
 )
 
 func (d *dummyData) Account() string                 { return "work" }
+func (d *dummyData) AccountBackend() string          { return "maildir" }
 func (d *dummyData) Signature() string               { return "" }
 func (d *dummyData) Folder() string                  { return "INBOX" }
 func (d *dummyData) To() []*mail.Address             { return []*mail.Address{&addr1} }
diff --git a/doc/aerc-templates.7.scd b/doc/aerc-templates.7.scd
index 71acc6b1..b5681030 100644
--- a/doc/aerc-templates.7.scd
+++ b/doc/aerc-templates.7.scd
@@ -200,6 +200,12 @@ available always.
 	{{.Account}}
 	```
 
+	The current account's backend:
+
+	```
+	{{.AccountBackend}}
+	```
+
 	Currently selected mailbox folder:
 
 	```
diff --git a/lib/state/templates.go b/lib/state/templates.go
index 37767660..e5206cf0 100644
--- a/lib/state/templates.go
+++ b/lib/state/templates.go
@@ -160,6 +160,13 @@ func (d *templateData) Account() string {
 	return ""
 }
 
+func (d *templateData) AccountBackend() string {
+	if d.account != nil {
+		return d.account.Backend
+	}
+	return ""
+}
+
 func (d *templateData) Folder() string {
 	if d.folder != nil {
 		return d.folder.Name
diff --git a/models/templates.go b/models/templates.go
index 5caed158..c9b5d5b3 100644
--- a/models/templates.go
+++ b/models/templates.go
@@ -9,6 +9,7 @@ import (
 // This interface needs to be implemented for compliance with aerc-templates(7)
 type TemplateData interface {
 	Account() string
+	AccountBackend() string
 	Folder() string
 	To() []*mail.Address
 	Cc() []*mail.Address