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3ff57d1d03
Also, /remove-from-category now accepts multiple hyphae at once, and removes them all
122 lines
4.4 KiB
Go
122 lines
4.4 KiB
Go
package categories
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import (
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"github.com/bouncepaw/mycorrhiza/user"
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"github.com/bouncepaw/mycorrhiza/util"
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"github.com/bouncepaw/mycorrhiza/viewutil"
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"github.com/gorilla/mux"
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"io"
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"log"
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"net/http"
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"strings"
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)
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// InitHandlers initializes HTTP handlers for the given router. Call somewhere in package web.
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func InitHandlers(r *mux.Router) {
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r.PathPrefix("/add-to-category").HandlerFunc(handlerAddToCategory).Methods("POST")
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r.PathPrefix("/remove-from-category").HandlerFunc(handlerRemoveFromCategory).Methods("POST")
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r.PathPrefix("/category/").HandlerFunc(handlerCategory).Methods("GET")
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r.PathPrefix("/edit-category/").HandlerFunc(handlerEditCategory).Methods("GET")
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r.PathPrefix("/category").HandlerFunc(handlerListCategory).Methods("GET")
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prepareViews()
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}
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func handlerEditCategory(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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catName := util.CanonicalName(strings.TrimPrefix(strings.TrimPrefix(rq.URL.Path, "/edit-category"), "/"))
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if catName == "" {
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http.Error(w, "No category name", http.StatusBadRequest)
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return
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}
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log.Println("Editing category", catName)
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categoryEdit(viewutil.MetaFrom(w, rq), catName)
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}
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func handlerListCategory(w http.ResponseWriter, rq *http.Request) {
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log.Println("Viewing list of categories")
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categoryList(viewutil.MetaFrom(w, rq))
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}
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func handlerCategory(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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catName := util.CanonicalName(strings.TrimPrefix(strings.TrimPrefix(rq.URL.Path, "/category"), "/"))
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if catName == "" {
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handlerListCategory(w, rq)
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return
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}
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log.Println("Viewing category", catName)
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categoryPage(viewutil.MetaFrom(w, rq), catName)
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}
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// A request for removal of hyphae can either remove one hypha (used in the card on /hypha) or many hyphae (used in /edit-category). Both approaches are handled by /remove-from-category. This function finds all passed hyphae.
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//
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// There is one hypha from the hypha field. Then there are n hyphae in fields prefixed by _. It seems like I have to do it myself. Compare with PHP which handles it for you. I hope I am doing this wrong.
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func hyphaeFromRequest(rq *http.Request) (canonicalNames []string) {
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if err := rq.ParseForm(); err != nil {
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log.Println(err)
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}
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if hyphaName := util.CanonicalName(rq.PostFormValue("hypha")); hyphaName != "" {
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canonicalNames = append(canonicalNames, hyphaName)
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}
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// According to https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/checkbox,
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//
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// > If a checkbox is unchecked when its form is submitted, there is no value submitted to the server to represent its unchecked state
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//
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// It means, that if there is a value, it is checked. And we can ignore values altogether.
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for key, _ := range rq.PostForm {
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// No prefix or "_":
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if !strings.HasPrefix(key, "_") || len(key) == 1 {
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continue
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}
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canonicalNames = append(canonicalNames, util.CanonicalName(key[1:]))
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}
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return
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}
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func handlerRemoveFromCategory(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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var (
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u = user.FromRequest(rq)
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hyphaNames = hyphaeFromRequest(rq)
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catName = util.CanonicalName(rq.PostFormValue("cat"))
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redirectTo = rq.PostFormValue("redirect-to")
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)
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if !u.CanProceed("remove-from-category") {
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w.WriteHeader(http.StatusForbidden)
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_, _ = io.WriteString(w, "403 Forbidden")
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return
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}
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if len(hyphaNames) == 0 || catName == "" {
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log.Printf("%s passed no data for removal of hyphae from a category\n", u.Name)
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http.Redirect(w, rq, redirectTo, http.StatusSeeOther)
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return
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}
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for _, hyphaName := range hyphaNames {
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// TODO: Make it more effective.
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removeHyphaFromCategory(hyphaName, catName)
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}
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log.Printf("%s removed %q from category %s\n", u.Name, hyphaNames, catName)
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http.Redirect(w, rq, redirectTo, http.StatusSeeOther)
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}
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func handlerAddToCategory(w http.ResponseWriter, rq *http.Request) {
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util.PrepareRq(rq)
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var (
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hyphaName = util.CanonicalName(rq.PostFormValue("hypha"))
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catName = util.CanonicalName(rq.PostFormValue("cat"))
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redirectTo = rq.PostFormValue("redirect-to")
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)
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if !user.FromRequest(rq).CanProceed("add-to-category") {
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w.WriteHeader(http.StatusForbidden)
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_, _ = io.WriteString(w, "403 Forbidden")
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return
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}
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if hyphaName == "" || catName == "" {
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http.Redirect(w, rq, redirectTo, http.StatusSeeOther)
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return
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}
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log.Println(user.FromRequest(rq).Name, "added", hyphaName, "to", catName)
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AddHyphaToCategory(hyphaName, catName)
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http.Redirect(w, rq, redirectTo, http.StatusSeeOther)
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}
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