Add ability to browse data

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
+}