Add ability to browse data

data.go

@@ -27,3 +27,29 @@ func (a *App) GetAllRAMTypes() ([]string, error) {
 	}
 	return types, err
 }
+
+func (a *App) GetAllTypes() ([]string, error) {
+	var types []string
+	var err error
+	for row := range a.db.Query("SELECT type FROM assets GROUP BY type ORDER BY type ASC").Range(&err) {
+		var name string
+		err := row.Scan(&name)
+		if err != nil {
+			return nil, err
+		}
+		types = append(types, name)
+	}
+	return types, err
+}
+
+func (a *App) GetAssetCount() (int, error) {
+	var count int
+	err := a.db.Query("SELECT COUNT(*) FROM assets").ScanSingle(&count)
+	return count, err
+}
+
+func (a *App) GetBrandCount() (int, error) {
+	var count int
+	err := a.db.Query("SELECT COUNT(DISTINCT brand) FROM assets").ScanSingle(&count)
+	return count, err
+}

go.mod

@@ -5,7 +5,7 @@ go 1.24
 toolchain go1.24.1
 
 require (
-	gitea.seeseepuff.be/seeseemelk/mysqlite v0.7.0
+	gitea.seeseepuff.be/seeseemelk/mysqlite v0.9.0
 	github.com/gin-gonic/gin v1.10.0
 )
 

go.sum

@@ -1,5 +1,5 @@
-gitea.seeseepuff.be/seeseemelk/mysqlite v0.7.0 h1:gq75Ce7QTQ5Rj5fzS/6eeOA/enyV0oDMVt5mejwX14Y=
+gitea.seeseepuff.be/seeseemelk/mysqlite v0.9.0 h1:GaU2DSrgDfZEqST3HdnNgfKSI4sNXvMm8SSfeMvBxA4=
-gitea.seeseepuff.be/seeseemelk/mysqlite v0.7.0/go.mod h1:cgswydOxJjMlNwfcBIXnKjr47LwXnMT9BInkiHb0tXE=
+gitea.seeseepuff.be/seeseemelk/mysqlite v0.9.0/go.mod h1:cgswydOxJjMlNwfcBIXnKjr47LwXnMT9BInkiHb0tXE=
 github.com/bytedance/sonic v1.13.1 h1:Jyd5CIvdFnkOWuKXr+wm4Nyk2h0yAFsr8ucJgEasO3g=
 github.com/bytedance/sonic v1.13.1/go.mod h1:o68xyaF9u2gvVBuGHPlUVCy+ZfmNNO5ETf1+KgkJhz4=
 github.com/bytedance/sonic/loader v0.1.1/go.mod h1:ncP89zfokxS5LZrJxl5z0UJcsk4M4yY2JpfqGeCtNLU=

main.go

@@ -37,6 +37,8 @@ func main() {
 		Funcs(template.FuncMap{
 			"statusText":       http.StatusText,
 			"createDeviceLink": createDeviceLink,
+			"formatMemorySize": formatMemorySize,
+			"formatType":       formatType,
 		}).
 		ParseFS(templateFS, "templates/*.gohtml")
 
@@ -54,6 +56,7 @@ func main() {
 	r.GET("/device", app.getDevice)
 	r.GET("/create", app.getCreateDevice)
 	r.POST("/create", app.postCreateDevice)
+	r.GET("/browse", app.getBrowse)
 	err = r.Run()
 	if err != nil {
 		log.Fatalf("error serving website: %v", err)

template_funcs.go

@@ -1,5 +1,9 @@
 package main
 
+import (
+	"fmt"
+)
+
 func createDeviceLink(deviceType, name string, qr *int) CreateDeviceLink {
 	return CreateDeviceLink{
 		Type: deviceType,
@@ -13,3 +17,31 @@ type CreateDeviceLink struct {
 	Name string
 	Qr   *int
 }
+
+func formatMemorySize(size int) string {
+	const (
+		KB = 1024
+		MB = KB * 1024
+		GB = MB * 1024
+	)
+
+	switch {
+	case size >= GB:
+		return fmt.Sprintf("%.2f GB", float64(size)/GB)
+	case size >= MB:
+		return fmt.Sprintf("%.2f MB", float64(size)/MB)
+	case size >= KB:
+		return fmt.Sprintf("%.2f KB", float64(size)/KB)
+	default:
+		return fmt.Sprintf("%d B", size)
+	}
+}
+
+func formatType(t string) string {
+	switch t {
+	case "ram":
+		return "Random Access Memory"
+	default:
+		return t
+	}
+}

templates/browse.gohtml

@@ -0,0 +1,31 @@
+{{- /*gotype: main.BrowseVM */}}
+{{define "browse"}}
+{{template "header" "Search Results"}}
+	<table border="1">
+		<tr>
+			<th>QR</th>
+			<th>Type</th>
+			<th>Name</th>
+			<th>Brand</th>
+			<th>Description</th>
+			{{if .HasRam}}
+				<th>RAM Type</th>
+				<th>RAM Capacity</th>
+			{{end}}
+		</tr>
+		{{range .Assets}}
+		<tr>
+			<td><a href="/device?id={{.Qr}}">{{.Qr}}</a></td>
+			<td><a href="/device?id={{.Qr}}">{{.Type | formatType}}</a></td>
+			<td>{{.Name}}</td>
+			<td>{{.Brand}}</td>
+			<td>{{.Description}}</td>
+			{{if $.HasRam}}
+				<td>{{.RamType}}</td>
+				<td>{{.RamCapacity | formatMemorySize}}</td>
+			{{end}}
+		</tr>
+		{{end}}
+	</table>
+{{template "footer"}}
+{{end}}

templates/device.gohtml

@@ -0,0 +1,33 @@
+{{- /*gotype: main.DeviceVM */}}
+{{define "device"}}
+{{template "header" "Device Details"}}
+	<table border="1">
+		<tr>
+			<td>Name:</td>
+			<td>{{.Name}}</td>
+		</tr>
+		<tr>
+			<td>Brand:</td>
+			<td>{{.Brand}}</td>
+		</tr>
+		<tr>
+			<td>Type:</td>
+			<td>{{.Type}}</td>
+		</tr>
+		<tr>
+			<td>Description:</td>
+			<td>{{.Description}}</td>
+		</tr>
+		{{if eq .Type "ram"}}
+		<tr>
+			<td>RAM Type:</td>
+			<td>{{.RamType}}</td>
+		</tr>
+		<tr>
+			<td>RAM Capacity:</td>
+			<td>{{.RamCapacity | formatMemorySize}}</td>
+		</tr>
+		{{end}}
+	</table>
+{{template "footer"}}
+{{end}}

templates/index.gohtml

@@ -1,9 +1,32 @@
 {{- /*gotype: main.IndexVM */}}
 {{define "index"}}
 {{template "header"}}
-	Some statistics:
+	<h2>Some statistics</h2>
 	<ul>
 		<li>Database contains {{.AssetCount}} assets.</li>
+		<li>Database contains {{.BrandCount}} brands.</li>
 	</ul>
+
+	<h2>Filter Devices</h2>
+	<form action="/browse" method="get">
+		<h3>Select Brands:</h3>
+		{{range .Brands}}
+		<label>
+			<input type="checkbox" name="brand" checked value="{{.}}">
+			{{.}}
+		</label><br>
+		{{end}}
+
+		<h3>Select Types:</h3>
+		{{range .Types}}
+		<label>
+			<input type="checkbox" name="type" checked value="{{.}}">
+			{{. | formatType}}
+		</label><br>
+		{{end}}
+
+		<button type="submit">Browse</button>
+	</form>
+
 {{template "footer"}}
 {{end}}

views.go

@@ -16,11 +16,33 @@ type App struct {
 
 type IndexVM struct {
 	AssetCount int
+	BrandCount int
+	Brands     []string
+	Types      []string
 }
 
 func (a *App) getIndex(c *gin.Context) {
 	vm := &IndexVM{}
-	err := a.db.Query("SELECT COUNT(*) FROM assets").ScanSingle(&vm.AssetCount)
+	var err error
+	vm.AssetCount, err = a.GetAssetCount()
+	if err != nil {
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	vm.BrandCount, err = a.GetBrandCount()
+	if err != nil {
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	vm.Brands, err = a.GetAllBrands()
+	if err != nil {
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	vm.Types, err = a.GetAllTypes()
 	if err != nil {
 		c.AbortWithError(http.StatusInternalServerError, err)
 		return
@@ -29,6 +51,15 @@ func (a *App) getIndex(c *gin.Context) {
 	c.HTML(http.StatusOK, "index", vm)
 }
 
+type DeviceVM struct {
+	Name        string
+	Brand       string
+	Type        string
+	Description string
+	RamType     string
+	RamCapacity int
+}
+
 func (a *App) getDevice(c *gin.Context) {
 	qr, err := strconv.Atoi(c.Query("id"))
 	if err != nil {
@@ -49,6 +80,27 @@ func (a *App) getDevice(c *gin.Context) {
 		c.Redirect(http.StatusTemporaryRedirect, "/create?id="+strconv.Itoa(qr))
 		return
 	}
+
+	vm := &DeviceVM{}
+	err = a.db.Query("SELECT name, brand, type, description FROM assets WHERE qr = ?").
+		Bind(qr).
+		ScanSingle(&vm.Name, &vm.Brand, &vm.Type, &vm.Description)
+	if err != nil {
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	if vm.Type == "ram" {
+		err = a.db.Query("SELECT type, capacity FROM info_ram WHERE asset = ?").
+			Bind(qr).
+			ScanSingle(&vm.RamType, &vm.RamCapacity)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+	}
+
+	c.HTML(http.StatusOK, "device", vm)
 }
 
 type CreateDeviceVM struct {
@@ -153,3 +205,70 @@ func (a *App) postCreateDeviceRam(c *gin.Context, qr int) error {
 	}
 	return tx.Commit()
 }
+
+type BrowseVM struct {
+	Assets []Asset
+	HasRam bool
+}
+
+type Asset struct {
+	Qr          int
+	Name        string
+	Brand       string
+	Type        string
+	Description string
+	RamType     string
+	RamCapacity int
+}
+
+func (a *App) getBrowse(c *gin.Context) {
+	brands := c.QueryArray("brand")
+	types := c.QueryArray("type")
+
+	query := `SELECT assets.qr, assets.name, assets.brand, assets.type, assets.description,
+    			info_ram.type, info_ram.capacity
+				FROM assets 
+				JOIN info_ram ON info_ram.asset = assets.qr
+				WHERE 1=1`
+	if len(brands) > 0 {
+		query += " AND assets.brand IN (" + placeholders(len(brands)) + ")"
+	}
+	if len(types) > 0 {
+		query += " AND assets.type IN (" + placeholders(len(types)) + ")"
+	}
+
+	vm := &BrowseVM{}
+
+	var err error
+	q := a.db.Query(query).Bind(brands, types)
+	for row := range q.Range(&err) {
+		var asset Asset
+		err := row.Scan(&asset.Qr, &asset.Name, &asset.Brand, &asset.Type, &asset.Description, &asset.RamType, &asset.RamCapacity)
+		if err != nil {
+			c.AbortWithError(http.StatusInternalServerError, err)
+			return
+		}
+		vm.Assets = append(vm.Assets, asset)
+		if asset.Type == "ram" {
+			vm.HasRam = true
+		}
+	}
+	if err != nil {
+		c.AbortWithError(http.StatusInternalServerError, err)
+		return
+	}
+
+	c.HTML(http.StatusOK, "browse", vm)
+}
+
+func placeholders(count int) string {
+	if count == 0 {
+		return ""
+	}
+	placeholder := "?"
+	for count > 1 {
+		placeholder += ", ?"
+		count--
+	}
+	return placeholder
+}