From 75044eef0331bb9448da813288aafc6735ce7c22 Mon Sep 17 00:00:00 2001
From: Brian Picciano <mediocregopher@gmail.com>
Date: Fri, 20 May 2022 10:13:46 -0600
Subject: [PATCH] Implement edit post page

---
 srv/src/api/api.go             |  3 +-
 srv/src/api/assets.go          |  4 +-
 srv/src/api/posts.go           | 32 ++++++++++++-
 srv/src/api/tpl.go             |  4 ++
 srv/src/api/tpl/edit-post.html | 82 ++++++++++++++++++++++++++++++++++
 srv/src/api/tpl/index.html     |  4 +-
 srv/src/api/tpl/post.html      |  4 +-
 srv/src/api/tpl/posts.html     |  2 +-
 8 files changed, 126 insertions(+), 9 deletions(-)
 create mode 100644 srv/src/api/tpl/edit-post.html

diff --git a/srv/src/api/api.go b/srv/src/api/api.go
index fc6f6a2..bc56164 100644
--- a/srv/src/api/api.go
+++ b/srv/src/api/api.go
@@ -214,7 +214,8 @@ func (a *api) handler() http.Handler {
 		v2Mux.Handle("/follow.html", a.renderDumbTplHandler("follow.html"))
 		v2Mux.Handle("/posts/", http.StripPrefix("/posts",
 			apiutil.MethodMux(map[string]http.Handler{
-				"GET": a.renderPostHandler(),
+				"GET":  a.renderPostHandler(),
+				"EDIT": a.editPostHandler(),
 				"DELETE": authMiddleware(auther,
 					formMiddleware(a.deletePostHandler()),
 				),
diff --git a/srv/src/api/assets.go b/srv/src/api/assets.go
index c1cd75e..47be14c 100644
--- a/srv/src/api/assets.go
+++ b/srv/src/api/assets.go
@@ -149,7 +149,7 @@ func (a *api) postPostAssetHandler() http.Handler {
 	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
 
 		id := r.PostFormValue("id")
-		if id == "" {
+		if id == "/" {
 			apiutil.BadRequest(rw, r, errors.New("id is required"))
 			return
 		}
@@ -176,7 +176,7 @@ func (a *api) deletePostAssetHandler() http.Handler {
 
 		id := filepath.Base(r.URL.Path)
 
-		if id == "" {
+		if id == "/" {
 			apiutil.BadRequest(rw, r, errors.New("id is required"))
 			return
 		}
diff --git a/srv/src/api/posts.go b/srv/src/api/posts.go
index a906f14..e5916e1 100644
--- a/srv/src/api/posts.go
+++ b/srv/src/api/posts.go
@@ -138,13 +138,43 @@ func (a *api) renderPostsIndexHandler() http.Handler {
 	})
 }
 
+func (a *api) editPostHandler() http.Handler {
+
+	tpl := a.mustParseBasedTpl("edit-post.html")
+
+	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
+
+		id := filepath.Base(r.URL.Path)
+
+		var storedPost post.StoredPost
+
+		if id != "/" {
+
+			var err error
+			storedPost, err = a.params.PostStore.GetByID(id)
+
+			if errors.Is(err, post.ErrPostNotFound) {
+				http.Error(rw, "Post not found", 404)
+				return
+			} else if err != nil {
+				apiutil.InternalServerError(
+					rw, r, fmt.Errorf("fetching post with id %q: %w", id, err),
+				)
+				return
+			}
+		}
+
+		executeTemplate(rw, r, tpl, storedPost)
+	})
+}
+
 func (a *api) deletePostHandler() http.Handler {
 
 	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
 
 		id := filepath.Base(r.URL.Path)
 
-		if id == "" {
+		if id == "/" {
 			apiutil.BadRequest(rw, r, errors.New("id is required"))
 			return
 		}
diff --git a/srv/src/api/tpl.go b/srv/src/api/tpl.go
index 5e33bea..9818b10 100644
--- a/srv/src/api/tpl.go
+++ b/srv/src/api/tpl.go
@@ -8,6 +8,7 @@ import (
 	"net/http"
 	"path/filepath"
 	"strings"
+	"time"
 
 	"github.com/mediocregopher/blog.mediocregopher.com/srv/api/apiutil"
 )
@@ -50,6 +51,9 @@ func (a *api) mustParseTpl(name string) *template.Template {
 			path := filepath.Join("posts", id)
 			return blogURL(path)
 		},
+		"DateTimeFormat": func(t time.Time) string {
+			return t.Format("2006-01-02")
+		},
 	})
 
 	tpl = template.Must(tpl.Parse(mustReadTplFile(name)))
diff --git a/srv/src/api/tpl/edit-post.html b/srv/src/api/tpl/edit-post.html
new file mode 100644
index 0000000..9e30d4d
--- /dev/null
+++ b/srv/src/api/tpl/edit-post.html
@@ -0,0 +1,82 @@
+{{ define "body" }}
+
+  <form method="POST" action="{{ BlogURL "posts/" }}">
+
+    <div class="row">
+
+      <div class="columns six">
+        <label for="idInput">Unique ID (e.g. "how-to-fly-a-kite")</label>
+        <input
+            id="idInput"
+            name="id"
+            class="u-full-width"
+            type="text"
+            value="{{ .Payload.ID }}" />
+      </div>
+
+      <div class="columns three">
+        <label for="tagsInput">Tags (space separated)</label>
+        <input
+            id="tagsInput"
+            name="tags"
+            class="u-full-width"
+            type="text"
+            value="{{ range $i, $tag := .Payload.Tags }}{{ if ne $i 0 }} {{ end }}{{ $tag }}{{ end }}" />
+      </div>
+
+      <div class="columns three">
+        <label for="seriesInput">Series</label>
+        <input
+            id="seriesInput"
+            name="series"
+            class="u-full-width"
+            type="text"
+            value="{{ .Payload.Series }}" />
+      </div>
+
+    </div>
+
+    <div class="row">
+
+      <div class="columns six">
+        <label for="titleInput">Title</label>
+        <input
+            id="titleInput"
+            name="title"
+            class="u-full-width"
+            type="text"
+            value="{{ .Payload.Title }}" />
+      </div>
+
+      <div class="columns six">
+        <label for="descrInput">Description</label>
+        <input
+            id="descrInput"
+            name="description"
+            class="u-full-width"
+            type="text"
+            value="{{ .Payload.Description }}" />
+      </div>
+
+    </div>
+
+    <div class="row">
+      <div class="columns twelve">
+       <textarea
+         name="body"
+         class="u-full-width"
+         placeholder="Blog body"
+         style="height: 50vh;"
+         >
+         {{ .Payload.Body }}
+       </textarea>
+      </div>
+    </div>
+
+    <input type="submit" value="Save" />
+
+  </form>
+
+{{ end }}
+
+{{ template "base.html" . }}
diff --git a/srv/src/api/tpl/index.html b/srv/src/api/tpl/index.html
index 946a3e4..e27cbef 100644
--- a/srv/src/api/tpl/index.html
+++ b/srv/src/api/tpl/index.html
@@ -7,9 +7,9 @@
       <h2>
         <a href="{{ PostURL .ID }}">{{ .Title }}</a>
       </h2>
-      <span>{{ .PublishedAt.Format "2006-01-02" }}</span>
+      <span>{{ DateTimeFormat .PublishedAt }}</span>
       {{ if not .LastUpdatedAt.IsZero }}
-      <span>(Updated {{ .LastUpdatedAt.Format "2006-01-02" }})</span>
+      <span>(Updated {{ DateTimeFormat .LastUpdatedAt }})</span>
       {{ end }}
       <p>{{ .Description }}</p>
     </li>
diff --git a/srv/src/api/tpl/post.html b/srv/src/api/tpl/post.html
index fadab3c..474d7c2 100644
--- a/srv/src/api/tpl/post.html
+++ b/srv/src/api/tpl/post.html
@@ -5,10 +5,10 @@
     {{ .Payload.Title }}
   </h1>
   <div class="light">
-    {{ .Payload.PublishedAt.Format "2006-01-02" }}
+    {{ DateTimeFormat .Payload.PublishedAt }}
     &nbsp;•&nbsp;
     {{ if not .Payload.LastUpdatedAt.IsZero }}
-    (Updated {{ .Payload.LastUpdatedAt.Format "2006-01-02" }})
+    (Updated {{ DateTimeFormat .Payload.LastUpdatedAt }})
     &nbsp;•&nbsp;
     {{ end }}
     <em>{{ .Payload.Description }}</em>
diff --git a/srv/src/api/tpl/posts.html b/srv/src/api/tpl/posts.html
index e701f59..714cf07 100644
--- a/srv/src/api/tpl/posts.html
+++ b/srv/src/api/tpl/posts.html
@@ -22,7 +22,7 @@
 
 
   <p style="text-align: center;">
-    <a href="{{ BlogURL "posts/" }}?method=new">
+    <a href="{{ BlogURL "posts/" }}?method=edit">
       <button>New Post</button>
     </a>
   </p>