290 lines
7.6 KiB
Go
290 lines
7.6 KiB
Go
package pkg
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import (
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"context"
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"fmt"
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"github.com/julienschmidt/httprouter"
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"html/template"
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"math"
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"net/http"
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"strconv"
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)
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type ProductEntry struct {
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Slug string
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Name string
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Price string
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Tags []string
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}
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type productsIndexPage struct {
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Products []*ProductEntry
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}
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func IndexProducts(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
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conn := getConn(r)
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company := mustGetCompany(r)
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tag := r.URL.Query().Get("tag")
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page := &productsIndexPage{
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Products: mustCollectProductEntries(r.Context(), conn, company, tag),
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}
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mustRenderMainTemplate(w, r, "products/index.gohtml", page)
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}
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func GetProductForm(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
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locale := getLocale(r)
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conn := getConn(r)
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company := mustGetCompany(r)
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form := newProductForm(r.Context(), conn, locale, company)
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slug := params[0].Value
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if slug == "new" {
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w.WriteHeader(http.StatusOK)
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mustRenderNewProductForm(w, r, form)
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return
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}
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if !form.MustFillFromDatabase(r.Context(), conn, slug) {
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http.NotFound(w, r)
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return
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}
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w.WriteHeader(http.StatusOK)
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mustRenderEditProductForm(w, r, slug, form)
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}
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func mustRenderNewProductForm(w http.ResponseWriter, r *http.Request, form *productForm) {
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mustRenderModalTemplate(w, r, "products/new.gohtml", form)
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}
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type editProductPage struct {
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Slug string
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ProductName string
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Form *productForm
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}
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func mustRenderEditProductForm(w http.ResponseWriter, r *http.Request, slug string, form *productForm) {
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page := &editProductPage{
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Slug: slug,
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ProductName: form.Name.Val,
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Form: form,
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}
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mustRenderModalTemplate(w, r, "products/edit.gohtml", page)
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}
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func HandleAddProduct(w http.ResponseWriter, r *http.Request, _ httprouter.Params) {
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conn := getConn(r)
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locale := getLocale(r)
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company := mustGetCompany(r)
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form := newProductForm(r.Context(), conn, locale, company)
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if err := form.Parse(r); err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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if err := verifyCsrfTokenValid(r); err != nil {
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http.Error(w, err.Error(), http.StatusForbidden)
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return
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}
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if !form.Validate() {
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if !IsHTMxRequest(r) {
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w.WriteHeader(http.StatusUnprocessableEntity)
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}
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mustRenderNewProductForm(w, r, form)
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return
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}
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taxes := mustSliceAtoi(form.Tax.Selected)
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conn.MustExec(r.Context(), "select add_product($1, $2, $3, $4, $5, $6)", company.Id, form.Name, form.Description, form.Price, taxes, form.Tags)
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if IsHTMxRequest(r) {
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w.Header().Set("HX-Trigger", "closeModal")
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w.Header().Set("HX-Refresh", "true")
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w.WriteHeader(http.StatusNoContent)
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} else {
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http.Redirect(w, r, companyURI(company, "/products"), http.StatusSeeOther)
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}
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}
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func sliceAtoi(s []string) ([]int, error) {
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var i []int
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for _, vs := range s {
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vi, err := strconv.Atoi(vs)
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if err != nil {
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return i, err
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}
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i = append(i, vi)
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}
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return i, nil
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}
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func mustSliceAtoi(s []string) []int {
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i, err := sliceAtoi(s)
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if err != nil {
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panic(err)
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}
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return i
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}
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func HandleUpdateProduct(w http.ResponseWriter, r *http.Request, params httprouter.Params) {
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conn := getConn(r)
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locale := getLocale(r)
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company := mustGetCompany(r)
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form := newProductForm(r.Context(), conn, locale, company)
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if err := form.Parse(r); err != nil {
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http.Error(w, err.Error(), http.StatusBadRequest)
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return
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}
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if err := verifyCsrfTokenValid(r); err != nil {
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http.Error(w, err.Error(), http.StatusForbidden)
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return
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}
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slug := params[0].Value
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if !form.Validate() {
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w.WriteHeader(http.StatusUnprocessableEntity)
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mustRenderEditProductForm(w, r, slug, form)
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return
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}
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taxes := mustSliceAtoi(form.Tax.Selected)
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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 {
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http.NotFound(w, r)
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}
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if IsHTMxRequest(r) {
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w.Header().Set("HX-Trigger", "closeModal")
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w.Header().Set("HX-Refresh", "true")
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w.WriteHeader(http.StatusNoContent)
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} else {
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http.Redirect(w, r, companyURI(company, "/products/"+slug), http.StatusSeeOther)
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}
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}
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func mustCollectProductEntries(ctx context.Context, conn *Conn, company *Company, tag string) []*ProductEntry {
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rows, err := conn.Query(ctx, `
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select product.slug
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, product.name
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, to_price(price, decimal_digits)
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, array_agg(coalesce(tag.name::text, ''))
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from product
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join company using (company_id)
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join currency using (currency_code)
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left join product_tag using (product_id)
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left join tag using(tag_id)
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where product.company_id = $1 and (($2 = '') or (tag.name = $2))
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group by product.slug
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, product.name
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, to_price(price, decimal_digits)
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order by name
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`, company.Id, tag)
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if err != nil {
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panic(err)
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}
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defer rows.Close()
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var entries []*ProductEntry
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for rows.Next() {
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entry := &ProductEntry{}
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err = rows.Scan(&entry.Slug, &entry.Name, &entry.Price, &entry.Tags)
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if err != nil {
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panic(err)
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}
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entries = append(entries, entry)
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}
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if rows.Err() != nil {
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panic(rows.Err())
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}
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return entries
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}
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type productForm struct {
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locale *Locale
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company *Company
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Name *InputField
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Description *InputField
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Price *InputField
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Tax *SelectField
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Tags *TagsField
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}
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func newProductForm(ctx context.Context, conn *Conn, locale *Locale, company *Company) *productForm {
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return &productForm{
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locale: locale,
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company: company,
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Name: &InputField{
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Name: "name",
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Label: pgettext("input", "Name", locale),
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Type: "text",
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Required: true,
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},
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Description: &InputField{
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Name: "description",
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Label: pgettext("input", "Description", locale),
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Type: "textarea",
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},
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Price: &InputField{
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Name: "price",
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Label: pgettext("input", "Price", locale),
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Type: "number",
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Required: true,
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Attributes: []template.HTMLAttr{
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`min="0"`,
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template.HTMLAttr(fmt.Sprintf(`step="%v"`, company.MinCents())),
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},
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},
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Tax: &SelectField{
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Name: "tax",
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Label: pgettext("input", "Taxes", locale),
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Multiple: true,
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Options: mustGetTaxOptions(ctx, conn, company),
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},
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Tags: &TagsField{
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Name: "tags",
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Label: pgettext("input", "Tags", locale),
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},
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}
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}
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func (form *productForm) Parse(r *http.Request) error {
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if err := r.ParseForm(); err != nil {
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return err
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}
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form.Name.FillValue(r)
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form.Description.FillValue(r)
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form.Price.FillValue(r)
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form.Tax.FillValue(r)
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form.Tags.FillValue(r)
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return nil
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}
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func (form *productForm) Validate() bool {
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validator := newFormValidator()
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validator.CheckRequiredInput(form.Name, gettext("Name can not be empty.", form.locale))
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if validator.CheckRequiredInput(form.Price, gettext("Price can not be empty.", form.locale)) {
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validator.CheckValidDecimal(form.Price, form.company.MinCents(), math.MaxFloat64, gettext("Price must be a number greater than zero.", form.locale))
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}
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validator.CheckValidSelectOption(form.Tax, gettext("Selected tax is not valid.", form.locale))
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validator.CheckAtMostOneOfEachGroup(form.Tax, gettext("You can only select a tax of each class.", form.locale))
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return validator.AllOK()
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}
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func (form *productForm) MustFillFromDatabase(ctx context.Context, conn *Conn, slug string) bool {
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return !notFoundErrorOrPanic(conn.QueryRow(ctx, `
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select product.name
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, product.description
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, to_price(price, decimal_digits)
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, array_agg(tax_id)
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, string_agg(tag.name, ',')
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from product
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left join product_tax using (product_id)
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left join product_tag using (product_id)
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left join tag using(company_id, tag_id)
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join company using (company_id)
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join currency using (currency_code)
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where product.slug = $1
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group by product_id
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, product.name
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, product.description
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, price
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, decimal_digits
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`, slug).Scan(
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form.Name,
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form.Description,
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form.Price,
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form.Tax,
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form.Tags))
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}
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