From 34424bd317103a53c9f668baf367316caaa3da00 Mon Sep 17 00:00:00 2001
From: decentral1se <cellarspoon@riseup.net>
Date: Wed, 10 May 2023 09:53:08 +0200
Subject: [PATCH] wip: first fuzzy filter implementation

---
 go.mod   |  1 +
 go.sum   |  2 ++
 gshmm.go | 38 +++++++++++++++++++++++++-------------
 3 files changed, 28 insertions(+), 13 deletions(-)

diff --git a/go.mod b/go.mod
index 08ce792..aaa8dbe 100644
--- a/go.mod
+++ b/go.mod
@@ -5,6 +5,7 @@ go 1.18
 require (
 	github.com/charmbracelet/bubbles v0.15.0
 	github.com/charmbracelet/bubbletea v0.23.1
+	github.com/sahilm/fuzzy v0.1.0
 )
 
 require (
diff --git a/go.sum b/go.sum
index 6976545..81d752c 100644
--- a/go.sum
+++ b/go.sum
@@ -11,6 +11,7 @@ github.com/charmbracelet/lipgloss v0.6.0 h1:1StyZB9vBSOyuZxQUcUwGr17JmojPNm87ini
 github.com/charmbracelet/lipgloss v0.6.0/go.mod h1:tHh2wr34xcHjC2HCXIlGSG1jaDF0S0atAUvBMP6Ppuk=
 github.com/containerd/console v1.0.3 h1:lIr7SlA5PxZyMV30bDW0MGbiOPXwc63yRuCP0ARubLw=
 github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
+github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
 github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
@@ -37,6 +38,7 @@ github.com/muesli/termenv v0.13.0/go.mod h1:sP1+uffeLaEYpyOTb8pLCUctGcGLnoFjSn4Y
 github.com/rivo/uniseg v0.1.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/sahilm/fuzzy v0.1.0 h1:FzWGaw2Opqyu+794ZQ9SYifWv2EIXpwP4q8dY1kDAwI=
 github.com/sahilm/fuzzy v0.1.0/go.mod h1:VFvziUEIMCrT6A6tw2RFIXPXXmzXbOsSHF0DOI8ZK9Y=
 golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
diff --git a/gshmm.go b/gshmm.go
index cb26c4d..53473ab 100644
--- a/gshmm.go
+++ b/gshmm.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/charmbracelet/bubbles/textinput"
 	tea "github.com/charmbracelet/bubbletea"
+	"github.com/sahilm/fuzzy"
 )
 
 const help = `go-sh-manymanuals: TODO
@@ -20,7 +21,7 @@ Options:
 
 // minCharsUntilFilter is the minimum amount of characters that are
 // required before the filtering logic commences actually filtering.
-const minCharsUntilFilter = 3
+const minCharsUntilFilter = 2
 
 var helpFlag bool
 
@@ -34,17 +35,22 @@ func handleCliFlags() {
 }
 
 type model struct {
-	filterInput textinput.Model
-	datasheets  []string
+	filterInput    textinput.Model // fuzzy search interface
+	datasheets     []string        // all datasheets under cwd
+	dataSheetsView []string        // filtered view on all datasheets
 }
 
 func initialModel() model {
 	input := textinput.New()
 	input.Focus()
 
+	// TODO(d1): gather actual datasheets
+	ds := []string{"foo", "bar", "baz", "bing"}
+
 	return model{
-		filterInput: input,
-		datasheets:  []string{},
+		filterInput:    input,
+		datasheets:     ds,
+		dataSheetsView: ds,
 	}
 }
 
@@ -59,18 +65,24 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 	var cmd tea.Cmd
 
 	if m.filterInput.Focused() {
-		var filtered []string
+		var matched []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)
-				}
+			matches := fuzzy.Find(search, m.datasheets)
+			for _, match := range matches {
+				matched = append(matched, match.Str)
+			}
+
+			if len(matches) > 0 {
+				m.dataSheetsView = matched
+			} else {
+				m.dataSheetsView = m.datasheets
 			}
-			m.datasheets = filtered
+		} else {
+			m.dataSheetsView = m.datasheets
 		}
+
 	}
 
 	switch msg := msg.(type) {
@@ -89,7 +101,7 @@ func (m model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 func (m model) View() string {
 	body := strings.Builder{}
 
-	body.WriteString(strings.Join(m.datasheets, "\n") + "\n")
+	body.WriteString(strings.Join(m.dataSheetsView, "\n") + "\n")
 
 	body.WriteString(m.filterInput.View() + "\n")