Add cell navigation, editor hotkey, stats and filter

3 files changed, 74 insertions, 2 deletions

diff --git a/internal/task/stats.go b/internal/task/stats.go
new file mode 100644
index 0000000..c516249
--- /dev/null
+++ b/internal/task/stats.go
@@ -0,0 +1,40 @@
+package task
+
+import "time"
+
+// TotalTasks returns the number of tasks provided.
+func TotalTasks(tasks []Task) int {
+	return len(tasks)
+}
+
+// InProgressTasks returns the number of tasks that have been started and are not completed.
+func InProgressTasks(tasks []Task) int {
+	count := 0
+	for _, t := range tasks {
+		if t.Status == "completed" {
+			continue
+		}
+		if t.Start != "" {
+			count++
+		}
+	}
+	return count
+}
+
+// DueTasks returns the number of tasks with a due date that is not in the future.
+func DueTasks(tasks []Task, now time.Time) int {
+	count := 0
+	for _, t := range tasks {
+		if t.Status == "completed" || t.Due == "" {
+			continue
+		}
+		ts, err := time.Parse("20060102T150405Z", t.Due)
+		if err != nil {
+			continue
+		}
+		if !ts.After(now) {
+			count++
+		}
+	}
+	return count
+}
diff --git a/internal/task/stats_test.go b/internal/task/stats_test.go
new file mode 100644
index 0000000..fddbd69
--- /dev/null
+++ b/internal/task/stats_test.go
@@ -0,0 +1,28 @@
+package task
+
+import (
+	"testing"
+	"time"
+)
+
+func TestStats(t *testing.T) {
+	now := time.Now()
+	tasks := []Task{
+		{Description: "t1"},
+		{Description: "t2", Start: "20240101T000000Z"},
+		{Description: "t3", Due: now.Add(-time.Hour).Format("20060102T150405Z")},
+		{Description: "t4", Start: "20240101T000000Z", Due: now.Add(-time.Hour).Format("20060102T150405Z")},
+	}
+
+	if TotalTasks(tasks) != 4 {
+		t.Errorf("total tasks wrong: %d", TotalTasks(tasks))
+	}
+
+	if InProgressTasks(tasks) != 2 {
+		t.Errorf("in progress wrong: %d", InProgressTasks(tasks))
+	}
+
+	if DueTasks(tasks, now) != 2 {
+		t.Errorf("due tasks wrong: %d", DueTasks(tasks, now))
+	}
+}
diff --git a/internal/task/task.go b/internal/task/task.go
index 4c33fdb..f7a3f73 100644
--- a/internal/task/task.go
+++ b/internal/task/task.go
@@ -46,8 +46,12 @@ func Add(description string, tags []string) error {
 
 // Export retrieves all tasks using `task export rc.json.array=off` and parses
 // the JSON output into a slice of Task structs.
-func Export() ([]Task, error) {
-	cmd := exec.Command("task", "export", "rc.json.array=off")
+// Export retrieves tasks using `task <filter> export rc.json.array=off` and parses
+// the JSON output into a slice of Task structs. Optional filter arguments are
+// passed directly to the `task` command before `export`.
+func Export(filters ...string) ([]Task, error) {
+	args := append(filters, "export", "rc.json.array=off")
+	cmd := exec.Command("task", args...)
 	out, err := cmd.Output()
 	if err != nil {
 		return nil, err