wip: towards file name filtering

gshmm.go

@@ -4,6 +4,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/charmbracelet/bubbles/textinput"
 	tea "github.com/charmbracelet/bubbletea"
@@ -17,6 +18,10 @@ Options:
 	-h    output help
 `
 
+// minCharsUntilFilter is the minimum amount of characters that are
+// required before the filtering logic commences actually filtering.
+const minCharsUntilFilter = 3
+
 var helpFlag bool
 
 type Configuration struct {
@@ -30,6 +35,7 @@ func handleCliFlags() {
 
 type model struct {
 	filterInput textinput.Model
+	datasheets  []string
 }
 
 func initialModel() model {
@@ -38,16 +44,35 @@ func initialModel() model {
 
 	return model{
 		filterInput: input,
+		datasheets:  []string{},
 	}
 }
 
 func (m model) Init() tea.Cmd {
+	// TODO(d1): implement reading all PDFs in cwd
+	// https://stackoverflow.com/a/67214584
+	// requires error reporting also
 	return textinput.Blink
 }
 
 func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	var cmd tea.Cmd
 
+	if m.filterInput.Focused() {
+		var filtered []string
+
+		search := m.filterInput.Value()
+		if len(search) >= minCharsUntilFilter {
+			// NOTE(d1): naive prototype implementation
+			for _, ds := range m.datasheets {
+				if strings.HasPrefix(ds, search) {
+					filtered = append(filtered, ds)
+				}
+			}
+			m.datasheets = filtered
+		}
+	}
+
 	switch msg := msg.(type) {
 	case tea.KeyMsg:
 		switch msg.String() {
@@ -62,7 +87,13 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 }
 
 func (m model) View() string {
-	return m.filterInput.View()
+	body := strings.Builder{}
+
+	body.WriteString(strings.Join(m.datasheets, "\n") + "\n")
+
+	body.WriteString(m.filterInput.View() + "\n")
+
+	return body.String()
 }
 
 func main() {