statusline: implement per-account status

Implement a statusline state for each account. Keep the ex line and the
push notifications global. Add account name prefix to push
notifications. Prefix status line with account name when multiple
accounts are available.

Use account-specific status line for each tab where an account is
defined.

Handle threading, filter/search, viewer passthrough and connection
status.

Signed-off-by: Koni Marti <koni.marti@gmail.com>
Acked-by: Robin Jarry <robin@jarry.cc>

1 files changed, 133 insertions, 0 deletions

diff --git a/lib/statusline/state.go b/lib/statusline/state.go
new file mode 100644
index 00000000..30029c13
--- /dev/null
+++ b/lib/statusline/state.go
@@ -0,0 +1,133 @@
+package statusline
+
+import (
+	"fmt"
+	"strings"
+)
+
+type State struct {
+	Name      string
+	Multiple  bool
+	Separator string
+
+	Connection   string
+	ConnActivity string
+	Connected    bool
+
+	Search         string
+	Filter         string
+	FilterActivity string
+
+	Threading   string
+	Passthrough string
+}
+
+func NewState(name string, multipleAccts bool, sep string) *State {
+	return &State{Name: name, Multiple: multipleAccts, Separator: sep}
+}
+
+func (s *State) String() string {
+	var line []string
+	if s.Connection != "" || s.ConnActivity != "" {
+		conn := s.Connection
+		if s.ConnActivity != "" {
+			conn = s.ConnActivity
+		}
+		if s.Multiple {
+			line = append(line, fmt.Sprintf("[%s] %s", s.Name, conn))
+		} else {
+			line = append(line, conn)
+		}
+	}
+	if s.Connected {
+		if s.FilterActivity != "" {
+			line = append(line, s.FilterActivity)
+		} else {
+			if s.Filter != "" {
+				line = append(line, s.Filter)
+			}
+		}
+		if s.Search != "" {
+			line = append(line, s.Search)
+		}
+		if s.Threading != "" {
+			line = append(line, s.Threading)
+		}
+		if s.Passthrough != "" {
+			line = append(line, s.Passthrough)
+		}
+	}
+	return strings.Join(line, s.Separator)
+}
+
+type SetStateFunc func(s *State)
+
+func Connected(state bool) SetStateFunc {
+	return func(s *State) {
+		s.ConnActivity = ""
+		s.Connected = state
+		if state {
+			s.Connection = "Connected"
+		} else {
+			s.Connection = "Disconnected"
+		}
+	}
+}
+
+func ConnectionActivity(desc string) SetStateFunc {
+	return func(s *State) {
+		s.ConnActivity = desc
+	}
+}
+
+func SearchFilterClear() SetStateFunc {
+	return func(s *State) {
+		s.Search = ""
+		s.FilterActivity = ""
+		s.Filter = ""
+	}
+}
+
+func FilterActivity(str string) SetStateFunc {
+	return func(s *State) {
+		s.FilterActivity = str
+	}
+}
+
+func FilterResult(str string) SetStateFunc {
+	return func(s *State) {
+		s.FilterActivity = ""
+		s.Filter = concatFilters(s.Filter, str)
+	}
+}
+
+func concatFilters(existing, next string) string {
+	if existing == "" {
+		return next
+	}
+	return fmt.Sprintf("%s && %s", existing, next)
+}
+
+func Search(desc string) SetStateFunc {
+	return func(s *State) {
+		s.Search = desc
+	}
+}
+
+func Threading(on bool) SetStateFunc {
+	return func(s *State) {
+		s.Threading = ""
+		if on {
+			s.Threading = "threading"
+		}
+	}
+}
+
+func Passthrough(on bool) SetStateFunc {
+	return func(s *State) {
+		s.Passthrough = ""
+		if on {
+			s.Passthrough = "passthrough"
+		}
+	}
+}