notmuch: add notmuch bindings

aerc is using an unmaintained fork of a not-well-functioning notmuch
binding library. Add custom bindings directly into the aerc repo to make
them more maintainable and more customizable to our needs.

Signed-off-by: Tim Culverhouse <tim@timculverhouse.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 39 insertions, 0 deletions

diff --git a/lib/notmuch/properties.go b/lib/notmuch/properties.go
new file mode 100644
index 00000000..6c025d05
--- /dev/null
+++ b/lib/notmuch/properties.go
@@ -0,0 +1,39 @@
+//go:build notmuch
+// +build notmuch
+
+package notmuch
+
+/*
+#cgo LDFLAGS: -lnotmuch
+
+#include <notmuch.h>
+
+*/
+import "C"
+
+type Properties struct {
+	key        *C.char
+	value      *C.char
+	properties *C.notmuch_message_properties_t
+}
+
+// Next advances the Properties iterator to the next property. Next returns false if
+// no more properties are available
+func (p *Properties) Next() bool {
+	if C.notmuch_message_properties_valid(p.properties) == 0 {
+		return false
+	}
+	p.key = C.notmuch_message_properties_key(p.properties)
+	p.value = C.notmuch_message_properties_value(p.properties)
+	C.notmuch_message_properties_move_to_next(p.properties)
+	return true
+}
+
+// Returns the key of the current iterator location
+func (p *Properties) Key() string {
+	return C.GoString(p.key)
+}
+
+func (p *Properties) Value() string {
+	return C.GoString(p.value)
+}