webring/cmd/web/handlers.go

package main

import (
	"errors"
	"fmt"
	"net/http"

	"git.32bit.cafe/yequari/webring/internal/models"
)

func (app *application) home(w http.ResponseWriter, r *http.Request) {
    if r.URL.Path != "/" {
        http.NotFound(w, r)
        return
    }

    sites, err := app.siteEntries.Latest()
    if err != nil {
        app.serverError(w, err)
    }

    app.render(w, http.StatusOK, "home.tmpl.html", &templateData{
        SiteEntries: sites,
    })
}

func (app *application) webmasterView(w http.ResponseWriter, r *http.Request) {
    id := models.WebmasterId(r.URL.Query().Get("id"))

    webmaster, err := app.webmasters.Get(id)
    if err != nil {
        if errors.Is(err, models.ErrNoRecord) {
            app.notFound(w)
        } else {
            app.serverError(w, err)
        }
        return
    }

    fmt.Fprintf(w, "%+v", webmaster)
}

func (app *application) webmasterCreate(w http.ResponseWriter, r *http.Request) {
}

func (app *application) siteEntryView(w http.ResponseWriter, r *http.Request) {
    id := models.SiteId(r.URL.Query().Get("id"))

    if id == "" {
        app.notFound(w)
        return
    }

    siteEntry, err := app.siteEntries.Get(id)
    if err != nil {
        if errors.Is(err, models.ErrNoRecord) {
            app.notFound(w)
        } else {
            app.serverError(w, err)
        }
        return
    }

    webmaster, err := app.webmasters.Get(siteEntry.Webmaster)
    if err != nil {
        if errors.Is(err, models.ErrNoRecord) {
            app.notFound(w)
        } else {
            app.serverError(w, err)
        }
        return
    }

    app.render(w, http.StatusOK, "view.tmpl.html", &templateData{
        SiteEntry: siteEntry,
        Webmaster: webmaster,
    })
}

func (app *application) siteEntryCreate(w http.ResponseWriter, r *http.Request) {
}

func (app *application) nextSiteEntry(w http.ResponseWriter, r *http.Request) {
    ref := app.cleanUrl(r.Referer())
    refSite, err := app.siteEntries.GetByUrl(ref)
    if err != nil {
        app.serverError(w, err)
        return
    }
    nextSite, err := app.siteEntries.Get(refSite.Next)
    if err != nil {
        app.serverError(w, err)
        app.infoLog.Printf("%+v", nextSite)
        return
    }
    // TODO ping next site to see if it is up
    w.Header().Set("Location", nextSite.Url)
    w.WriteHeader(http.StatusFound)
}

func (app *application) prevSiteEntry(w http.ResponseWriter, r *http.Request) {
    ref := app.cleanUrl(r.Referer())
    refSite, err := app.siteEntries.GetByUrl(ref)
    if err != nil {
        app.serverError(w, err)
        return
    }
    prevSite, err := app.siteEntries.Get(refSite.Prev)
    if err != nil {
        app.serverError(w, err)
        return
    }
    // TODO ping next site to see if it is up
    w.Header().Set("Location", prevSite.Url)
    w.WriteHeader(http.StatusFound)
}