SQLite FTS example (#20)

* SQLite FTS example

* refactor: remove via cfg chaining

---------

Co-authored-by: Joao Goncalves <joao.goncalves01@gmail.com>

internal/examples/shakespeare/main.go

@@ -0,0 +1,109 @@
+package main
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+	"time"
+
+	"github.com/go-via/via"
+	"github.com/go-via/via/h"
+	_ "github.com/mattn/go-sqlite3"
+)
+
+type DataSource interface {
+	Open()
+	Query(str string) (*sql.Rows, error)
+	Close() error
+}
+
+type ShakeDB struct {
+	db             *sql.DB
+	findByTextStmt *sql.Stmt
+}
+
+func (shakeDB *ShakeDB) Prepare() {
+	db, err := sql.Open("sqlite3", "shake.db")
+	if err != nil {
+		log.Fatal(err)
+	}
+	stmt, err := db.Prepare(`select play,player,plays.text 
+	from playsearch inner join plays on playsearch.playsrowid=plays.rowid where playsearch.text match ?
+	order by plays.play, plays.player limit 200;`)
+	if err != nil {
+		log.Fatal(err)
+	}
+	shakeDB.db = db
+	shakeDB.findByTextStmt = stmt
+}
+
+func (shakeDB *ShakeDB) Query(str string) (*sql.Rows, error) {
+	return shakeDB.findByTextStmt.Query(str)
+}
+
+func (shakeDB *ShakeDB) Close() {
+	if shakeDB.db != nil {
+		shakeDB.db.Close()
+		shakeDB.db = nil
+	}
+}
+
+func main() {
+	v := via.New()
+
+	v.Config(via.Options{
+		DevMode:       true,
+		DocumentTitle: "Search",
+		LogLvl:        via.LogLevelWarn,
+	})
+
+	v.AppendToHead(
+		h.Link(h.Rel("stylesheet"), h.Href("https://cdn.jsdelivr.net/npm/@picocss/pico@2/css/pico.min.css")),
+		h.StyleEl(h.Raw(".no-wrap { white-space: nowrap; }")),
+	)
+	shakeDB := &ShakeDB{}
+	shakeDB.Prepare()
+	defer shakeDB.Close()
+
+	v.Page("/", func(c *via.Context) {
+		query := c.Signal("whether tis")
+		var rowsTable H
+		runQuery := func() {
+			qry := query.String()
+			start := time.Now()
+			rows, error := shakeDB.Query(qry)
+			fmt.Println("query ", qry, "took", time.Since(start))
+			if error != nil {
+				rowsTable = h.Div(h.Text("Error: " + error.Error()))
+			} else {
+				table, err := RenderTable(rows, []string{"no-wrap", "no-wrap", ""})
+				if err != nil {
+					rowsTable = h.Div(h.Text("Error: " + err.Error()))
+				} else {
+					rowsTable = table
+				}
+			}
+		}
+		runQueryAction := c.Action(func() {
+			runQuery()
+			c.Sync()
+		})
+		runQuery()
+		c.View(func() h.H {
+			return h.Div(
+				h.H2(h.Text("Search")), h.FieldSet(
+					h.Attr("role", "group"),
+					h.Input(
+						h.Type("text"),
+						query.Bind(),
+						h.Attr("autofocus"),
+						runQueryAction.OnKeyDown("Enter"),
+					),
+					h.Button(h.Text("Search"), runQueryAction.OnClick())),
+				rowsTable,
+			)
+		})
+	})
+
+	v.Start()
+}