add new templates and template helper functions, render webring on homepage

cmd/web/handlers.go

@@ -4,7 +4,6 @@ import (
 	"errors"
 	"fmt"
 	"net/http"
-	"text/template"
 
 	"git.32bit.cafe/yequari/webring/internal/models"
 )
@@ -15,21 +14,14 @@ func (app *application) home(w http.ResponseWriter, r *http.Request) {
         return
     }
 
-    files := []string{
-        "./ui/html/base.tmpl.html",
-        "./ui/html/pages/home.tmpl.html",
-    }
-
-    ts, err := template.ParseFiles(files...)
-    if err != nil {
-        app.serverError(w, err)
-        return
-    }
-
-    err = ts.ExecuteTemplate(w, "base", nil)
+    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) {
@@ -52,18 +44,12 @@ func (app *application) webmasterCreate(w http.ResponseWriter, r *http.Request)
 }
 
 func (app *application) siteEntryView(w http.ResponseWriter, r *http.Request) {
-    if r.URL.Path == "/sites/view" {
-        entries, err := app.siteEntries.Latest()
-        if err != nil {
-            app.serverError(w, err)
-            return
-        }
-        for _, entry := range entries {
-            fmt.Fprintf(w, "%+v\n", entry)
-        }
+    id := models.SiteId(r.URL.Query().Get("id"))
+
+    if id == "" {
+        app.notFound(w)
         return
     }
-    id := models.SiteId(r.URL.Query().Get("id"))
 
     siteEntry, err := app.siteEntries.Get(id)
     if err != nil {
@@ -75,7 +61,20 @@ func (app *application) siteEntryView(w http.ResponseWriter, r *http.Request) {
         return
     }
 
-    fmt.Fprintf(w, "%+v", siteEntry)
+    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) {

cmd/web/helpers.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"net/http"
 	"path"
@@ -30,3 +31,26 @@ func (app *application) cleanUrl(url string) string {
     s = "http://" + s
     return s
 }
+
+func (app *application) render(w http.ResponseWriter, status int, page string, data *templateData) {
+    ts, ok := app.templateCache[page]
+    if !ok {
+        err := fmt.Errorf("the template %s does not exist", page)
+        app.serverError(w, err)
+        return
+    }
+
+    // a buffer to attempt to write the template to
+    // before writing it to the ResponseWriter w
+    buf := new(bytes.Buffer)
+
+    err := ts.ExecuteTemplate(buf, "base", data)
+    if err != nil {
+        app.serverError(w, err)
+        return
+    }
+
+    w.WriteHeader(status)
+
+    buf.WriteTo(w)
+}

cmd/web/main.go

@@ -1,15 +1,16 @@
 package main
 
 import (
+	"database/sql"
 	"flag"
 	"log"
 	"net/http"
 	"os"
-    "database/sql"
+	"text/template"
 
 	"git.32bit.cafe/yequari/webring/internal/models"
 
-    _ "modernc.org/sqlite"
+	_ "modernc.org/sqlite"
 )
 
 type application struct {
@@ -17,6 +18,7 @@ type application struct {
     infoLog *log.Logger
     siteEntries *models.SiteEntryModel
     webmasters *models.WebmasterModel
+    templateCache map[string]*template.Template
 }
 
 func main() {
@@ -33,11 +35,17 @@ func main() {
     }
     defer db.Close()
 
+    templateCache, err := newTemplateCache()
+    if err != nil {
+        errorLog.Fatal(err)
+    }
+
     app := &application{
         errorLog: errorLog,
         infoLog: infoLog,
         siteEntries: &models.SiteEntryModel{DB: db},
         webmasters: &models.WebmasterModel{DB: db},
+        templateCache: templateCache,
     }
 
     srv := &http.Server{

cmd/web/templates.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"path/filepath"
+	"text/template"
+
+	"git.32bit.cafe/yequari/webring/internal/models"
+)
+
+type templateData struct {
+    SiteEntry *models.SiteEntry
+    Webmaster *models.Webmaster
+    SiteEntries []*models.SiteEntry
+}
+
+func newTemplateCache() (map[string]*template.Template, error) {
+    cache := map[string]*template.Template{}
+
+    pages, err := filepath.Glob("./ui/html/pages/*.tmpl.html")
+    if err != nil {
+        return nil, err
+    }
+
+    for _, page := range pages {
+        name := filepath.Base(page)
+
+        ts, err := template.ParseFiles("./ui/html/base.tmpl.html")
+        if err != nil {
+            return nil, err
+        }
+
+        // parse all partials into the template set
+        ts, err = ts.ParseGlob("./ui/html/partials/*.tmpl.html")
+        if err != nil {
+            return nil, err
+        }
+
+        // parse the page template last
+        ts, err = ts.ParseFiles(page)
+        if err != nil {
+            return nil, err
+        }
+
+        cache[name] = ts
+    }
+
+    return cache, nil
+}

internal/models/siteentry.go

@@ -47,8 +47,7 @@ func (m *SiteEntryModel) Get(id SiteId) (*SiteEntry, error) {
     s := &SiteEntry{}
 
     
-    var timeStr string
-    err := row.Scan(&s.Id, &s.Name, &s.Url, &s.Webmaster, &timeStr, &s.Next, &s.Prev)
+    err := row.Scan(&s.Id, &s.Name, &s.Url, &s.Webmaster, &s.DateAdded, &s.Next, &s.Prev)
     if err != nil {
         if errors.Is(err, sql.ErrNoRows) {
             return nil, ErrNoRecord
@@ -56,13 +55,6 @@ func (m *SiteEntryModel) Get(id SiteId) (*SiteEntry, error) {
             return nil, err
         }
     }
-    // time is stored as a string in sqlite, so we need to parse it
-    // probably is something taken care of in the driver
-    dateAdded, err := time.Parse(time.DateTime, timeStr)
-    if err != nil {
-        return nil, err
-    }
-    s.DateAdded = dateAdded
 
     return s, nil
 }
@@ -76,8 +68,7 @@ func (m *SiteEntryModel) GetByUrl(url string) (*SiteEntry, error) {
     s := &SiteEntry{}
 
     
-    var timeStr string
-    err := row.Scan(&s.Id, &s.Name, &s.Url, &s.Webmaster, &timeStr, &s.Next, &s.Prev)
+    err := row.Scan(&s.Id, &s.Name, &s.Url, &s.Webmaster, &s.DateAdded, &s.Next, &s.Prev)
     if err != nil {
         if errors.Is(err, sql.ErrNoRows) {
             return nil, ErrNoRecord
@@ -85,15 +76,8 @@ func (m *SiteEntryModel) GetByUrl(url string) (*SiteEntry, error) {
             return nil, err
         }
     }
-    // time is stored as a string in sqlite, so we need to parse it
-    // probably is something taken care of in the driver
-    s.DateAdded, err = time.Parse(time.DateTime, timeStr)
-    if err != nil {
-        return nil, err
-    }
 
     return s, nil
-
 }
 
 // Update existing SiteEntry with the values of passed entry
@@ -119,15 +103,14 @@ func (m *SiteEntryModel) Latest() ([]*SiteEntry, error) {
     defer rows.Close()
 
     entries := []*SiteEntry{}
-    var timeStr string
+    // var timeStr string
 
     for rows.Next() {
         s := &SiteEntry{}
-        err = rows.Scan(&s.Id, &s.Name, &s.Url, &s.Webmaster, &timeStr)
+        err = rows.Scan(&s.Id, &s.Name, &s.Url, &s.Webmaster, &s.DateAdded)
         if err != nil {
             return nil, err
         }
-        s.DateAdded, err = time.Parse(time.DateTime, timeStr)
         if err != nil {
             return nil, err
         }

ui/html/base.tmpl.html

@@ -8,6 +8,7 @@
     <body>
         <header>
             <h1>Webring</h1>
+            {{template "nav" .}}
         </header>
         <main>
             {{template "main" .}}

ui/html/pages/home.tmpl.html

@@ -2,5 +2,13 @@
 
 {{define "main"}}
 <h2>Latest Websites</h2>
+{{ if .SiteEntries }}
+<ul>
+{{ range .SiteEntries }}
+<li><a href="{{.Url}}">{{.Name}}</a> (<a href="/sites/view?id={{.Id}}">info</a>)</li>
+{{ end }}
+</ul>
+{{ else }}
 <p>There's nothing to see here yet!</p>
+{{ end }}
 {{end}}

ui/html/pages/view.tmpl.html

@@ -0,0 +1,13 @@
+{{define "title"}}Site Entry #{{.SiteEntry.Id}}{{end}}
+{{define "main"}}
+<div class='snippet'>
+    <div class='metadata'>
+        <strong>{{.SiteEntry.Name}}</strong>
+        <span>#{{.SiteEntry.Id}}</span>
+    </div>
+    <div class='metadata'>
+        <time>Created: {{.SiteEntry.DateAdded}}</time>
+        <p>Webmaster: {{.Webmaster.Name}}</p>
+    </div>
+</div>
+{{end}}

ui/html/partials/nav.tmpl.html

@@ -0,0 +1,5 @@
+{{define "nav"}}
+<nav>
+    <a href="/">Home</a>
+</nav>
+{{end}}