package pkg import ( "context" "fmt" "github.com/julienschmidt/httprouter" "html/template" "math" "net/http" "strconv" "strings" ) type ProductEntry struct { Slug string Name string Price string Tags []string } type productsIndexPage struct { Products []*ProductEntry Filters *productFilterForm } func IndexProducts(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { conn := getConn(r) company := mustGetCompany(r) locale := getLocale(r) filters := newProductFilterForm(locale) if err := filters.Parse(r); err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } page := &productsIndexPage{ Products: mustCollectProductEntries(r.Context(), conn, company, filters), Filters: filters, } mustRenderMainTemplate(w, r, "products/index.gohtml", page) } func GetProductForm(w http.ResponseWriter, r *http.Request, params httprouter.Params) { locale := getLocale(r) conn := getConn(r) company := mustGetCompany(r) form := newProductForm(r.Context(), conn, locale, company) slug := params[0].Value if slug == "new" { w.WriteHeader(http.StatusOK) mustRenderNewProductForm(w, r, form) return } if !form.MustFillFromDatabase(r.Context(), conn, slug) { http.NotFound(w, r) return } w.WriteHeader(http.StatusOK) mustRenderEditProductForm(w, r, slug, form) } func mustRenderNewProductForm(w http.ResponseWriter, r *http.Request, form *productForm) { mustRenderMainTemplate(w, r, "products/new.gohtml", form) } type editProductPage struct { Slug string ProductName string Form *productForm } func mustRenderEditProductForm(w http.ResponseWriter, r *http.Request, slug string, form *productForm) { page := &editProductPage{ Slug: slug, ProductName: form.Name.Val, Form: form, } mustRenderMainTemplate(w, r, "products/edit.gohtml", page) } func HandleAddProduct(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { conn := getConn(r) locale := getLocale(r) company := mustGetCompany(r) form := newProductForm(r.Context(), conn, locale, company) if err := form.Parse(r); err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } if err := verifyCsrfTokenValid(r); err != nil { http.Error(w, err.Error(), http.StatusForbidden) return } if !form.Validate() { if !IsHTMxRequest(r) { w.WriteHeader(http.StatusUnprocessableEntity) } mustRenderNewProductForm(w, r, form) return } taxes := mustSliceAtoi(form.Tax.Selected) conn.MustExec(r.Context(), "select add_product($1, $2, $3, $4, $5, $6)", company.Id, form.Name, form.Description, form.Price, taxes, form.Tags) htmxRedirect(w, r, companyURI(company, "/products")) } func sliceAtoi(s []string) ([]int, error) { var i []int for _, vs := range s { vi, err := strconv.Atoi(vs) if err != nil { return i, err } i = append(i, vi) } return i, nil } func mustSliceAtoi(s []string) []int { i, err := sliceAtoi(s) if err != nil { panic(err) } return i } func HandleUpdateProduct(w http.ResponseWriter, r *http.Request, params httprouter.Params) { conn := getConn(r) locale := getLocale(r) company := mustGetCompany(r) form := newProductForm(r.Context(), conn, locale, company) if err := form.Parse(r); err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } if err := verifyCsrfTokenValid(r); err != nil { http.Error(w, err.Error(), http.StatusForbidden) return } slug := params[0].Value if !form.Validate() { if !IsHTMxRequest(r) { w.WriteHeader(http.StatusUnprocessableEntity) } mustRenderEditProductForm(w, r, slug, form) return } taxes := mustSliceAtoi(form.Tax.Selected) if ok := conn.MustGetBool(r.Context(), "select edit_product($1, $2, $3, $4, $5, $6)", slug, form.Name, form.Description, form.Price, taxes, form.Tags); !ok { http.NotFound(w, r) return } htmxRedirect(w, r, companyURI(company, "/products")) } type productFilterForm struct { Name *InputField Tags *TagsField TagsCondition *ToggleField } func newProductFilterForm(locale *Locale) *productFilterForm { return &productFilterForm{ Name: &InputField{ Name: "number", Label: pgettext("input", "Name", locale), Type: "search", }, Tags: &TagsField{ Name: "tags", Label: pgettext("input", "Tags", locale), }, TagsCondition: &ToggleField{ Name: "tags_condition", Label: pgettext("input", "Tags Condition", locale), Selected: "and", FirstOption: &ToggleOption{ Value: "and", Label: pgettext("tag condition", "All", locale), Description: gettext("Invoices must have all the specified labels.", locale), }, SecondOption: &ToggleOption{ Value: "or", Label: pgettext("tag condition", "Any", locale), Description: gettext("Invoices must have at least one of the specified labels.", locale), }, }, } } func (form *productFilterForm) Parse(r *http.Request) error { if err := r.ParseForm(); err != nil { return err } form.Name.FillValue(r) form.Tags.FillValue(r) form.TagsCondition.FillValue(r) return nil } func mustCollectProductEntries(ctx context.Context, conn *Conn, company *Company, filters *productFilterForm) []*ProductEntry { args := []interface{}{company.Id} where := []string{"product.company_id = $1"} appendWhere := func(expression string, value interface{}) { args = append(args, value) where = append(where, fmt.Sprintf(expression, len(args))) } if filters != nil { name := strings.TrimSpace(filters.Name.String()) if name != "" { appendWhere("product.name ilike $%d", "%"+name+"%") } if len(filters.Tags.Tags) > 0 { if filters.TagsCondition.Selected == "and" { appendWhere("product.tags @> $%d", filters.Tags) } else { appendWhere("product.tags && $%d", filters.Tags) } } } rows := conn.MustQuery(ctx, fmt.Sprintf(` select product.slug , product.name , to_price(price, decimal_digits) , tags from product join company using (company_id) join currency using (currency_code) where (%s) order by name `, strings.Join(where, ") AND (")), args...) defer rows.Close() var entries []*ProductEntry for rows.Next() { entry := &ProductEntry{} if err := rows.Scan(&entry.Slug, &entry.Name, &entry.Price, &entry.Tags); err != nil { panic(err) } entries = append(entries, entry) } if rows.Err() != nil { panic(rows.Err()) } return entries } type productForm struct { locale *Locale company *Company Name *InputField Description *InputField Price *InputField Tax *SelectField Tags *TagsField } func newProductForm(ctx context.Context, conn *Conn, locale *Locale, company *Company) *productForm { return &productForm{ locale: locale, company: company, Name: &InputField{ Name: "name", Label: pgettext("input", "Name", locale), Type: "text", Required: true, }, Description: &InputField{ Name: "description", Label: pgettext("input", "Description", locale), Type: "textarea", }, Price: &InputField{ Name: "price", Label: pgettext("input", "Price", locale), Type: "number", Required: true, Attributes: []template.HTMLAttr{ `min="0"`, template.HTMLAttr(fmt.Sprintf(`step="%v"`, company.MinCents())), }, }, Tax: &SelectField{ Name: "tax", Label: pgettext("input", "Taxes", locale), Multiple: true, Options: mustGetTaxOptions(ctx, conn, company), }, Tags: &TagsField{ Name: "tags", Label: pgettext("input", "Tags", locale), }, } } func (form *productForm) Parse(r *http.Request) error { if err := r.ParseForm(); err != nil { return err } form.Name.FillValue(r) form.Description.FillValue(r) form.Price.FillValue(r) form.Tax.FillValue(r) form.Tags.FillValue(r) return nil } func (form *productForm) Validate() bool { validator := newFormValidator() validator.CheckRequiredInput(form.Name, gettext("Name can not be empty.", form.locale)) if validator.CheckRequiredInput(form.Price, gettext("Price can not be empty.", form.locale)) { validator.CheckValidDecimal(form.Price, form.company.MinCents(), math.MaxFloat64, gettext("Price must be a number greater than zero.", form.locale)) } validator.CheckValidSelectOption(form.Tax, gettext("Selected tax is not valid.", form.locale)) validator.CheckAtMostOneOfEachGroup(form.Tax, gettext("You can only select a tax of each class.", form.locale)) return validator.AllOK() } func (form *productForm) MustFillFromDatabase(ctx context.Context, conn *Conn, slug string) bool { return !notFoundErrorOrPanic(conn.QueryRow(ctx, ` select product.name , product.description , to_price(price, decimal_digits) , array_agg(tax_id) , array_to_string(tags, ',') from product left join product_tax using (product_id) join company using (company_id) join currency using (currency_code) where product.slug = $1 group by product_id , product.name , product.description , price , tags , decimal_digits `, slug).Scan( form.Name, form.Description, form.Price, form.Tax, form.Tags)) } func HandleProductSearch(w http.ResponseWriter, r *http.Request, _ httprouter.Params) { filters := newProductFilterForm(getLocale(r)) query := r.URL.Query() index := query.Get("index") filters.Name.Val = strings.TrimSpace(query.Get("product.name." + index)) var products []*ProductEntry if len(filters.Name.Val) > 0 { products = mustCollectProductEntries(r.Context(), getConn(r), mustGetCompany(r), filters) } mustRenderStandaloneTemplate(w, r, "products/search.gohtml", products) }