Allow dynamic images on each blog post (#143)

* Allow dynamic images on each blog post

* Adding responsive CSS for blog post images

* Adding image parameter to YAML front matter

README.md

@@ -137,6 +137,7 @@ subtitle    | Short description of page or blog post that goes under the title
 bigimg      | Include a large full-width image at the top of the page.  You can either give the path to a single image, or provide a list of images to cycle through (see [my personal website](http://deanattali.com/) as an example).
 comments    | If you want do add Disqus comments to a specific page, use `comments: true`. Comments are automatically enabled on blog posts; to turn comments off for a specific post, use `comments: false`. Comments only work if you set your Disqus id in the `_config.yml` file.
 show-avatar | If you have an avatar configured in the `_config.yml` but you want to turn it off on a specific page, use `show-avatar: false`. If you want to turn it off by default, locate the line `show-avatar: true` in the file `_config.yml` and change the `true` to `false`; then you can selectively turn it on in specific pages using `show-avatar: true`.
+image       | If you want to add a personalized image to your blog post that will show up next to the post's excerpt and on the post itself, use `image: /img/some_image.jpeg` where `some_image.jpeg` is replaced by the name of the image you would like to use.
 share-img   | If you want to specify an image to use when sharing the page on Facebook or Twitter, then provide the image's full URL here.
 social-share | If you don't want to show buttons to share a blog post on social media, use `social-share: false` (this feature is turned on by default).
 layout      | What type of page this is (default is `blog` for blog posts and `page` for other pages. You can use `minimal` if you don't want a header and footer)  

_config.yml

@@ -182,6 +182,13 @@ prose:
           help: "Enter date of post."
           placeholder: "yyyy-mm-dd"
           alterable: true
+      - name: "image"
+        field:
+          element: "text"
+          label: "Image"
+          help: "Add a thumbnail image to your post."
+          placeholder: "Thumbnail"
+          alterable: true
       - name: "published"
         field:
           element: "checkbox"

_includes/nav.html

@@ -37,7 +37,15 @@
       </ul>
     </div>
 
-	{% if site.avatar and (layout.show-avatar or page.show-avatar) %}
+	{% if page.image and (layout.show-avatar or page.show-avatar) %}
+	<div class="avatar-container">
+	  <div class="avatar-img-border">
+	    <a href="{{ site.url }} ">
+	      <img class="avatar-img" src="{{ page.image | prepend: site.baseurl | replace: '//', '/' }}" />
+		</a>
+	  </div>
+	</div>
+	{% elsif site.avatar and (layout.show-avatar or page.show-avatar) %}
 	<div class="avatar-container">
 	  <div class="avatar-img-border">
 	    <a href="{{ site.url }} ">

_posts/2015-01-04-first-post.md

@@ -1,6 +1,7 @@
 ---
 layout: post
 title: First post!
+image: /img/hello_world.jpeg
 tags: [random, exciting-stuff]
 ---
 

css/main.css

@@ -340,6 +340,28 @@ footer .theme-by {
 .post-preview .post-entry {
   font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
 }
+.post-entry-container {
+  display: inline-block;
+  width: 100%;
+}
+.post-entry {
+  width: 100%;
+}
+.post-image {
+  float: right;
+  height: 192px;
+  width: 192px;
+  margin-top: -35px;
+  filter: grayscale(90%);
+}
+.post-image:hover {
+  filter: grayscale(0%);
+}
+.post-image img {
+  border-radius: 100px;
+  height: 192px;
+  width: 192px;
+}
 .post-preview .post-read-more {
   font-weight: 800;
 }
@@ -382,6 +404,19 @@ footer .theme-by {
   }
 }
 
+@media only screen and (max-width: 500px) {
+  .post-image, .post-image img {
+    height: 100px;
+    width: 100px;
+  }
+  
+  .post-image {
+    width: 100%;
+    text-align: center;
+    margin-top: 0;
+    float: left;
+  }
+}
 /* --- Post and page headers --- */
 
 .intro-header {

index.html

@@ -21,12 +21,21 @@ subtitle: This is where I will tell my friends way too much about me
       Posted on {{ post.date | date: "%B %-d, %Y" }}
     </p>
 
-    <div class="post-entry">
-      {{ post.excerpt | strip_html | xml_escape | truncatewords: site.excerpt_length }}
-      {% assign excerpt_word_count = post.excerpt | number_of_words %}
-      {% if post.content != post.excerpt or excerpt_word_count > site.excerpt_length %}
-        <a href="{{ post.url | prepend: site.baseurl }}" class="post-read-more">[Read&nbsp;More]</a>
+    <div class="post-entry-container">
+      {% if post.image %}
+      <div class="post-image">
+        <a href="{{ post.url | prepend: site.baseurl }}">
+          <img src="{{ post.image }}">
+        </a>
+      </div>
       {% endif %}
+      <div class="post-entry">
+        {{ post.excerpt | strip_html | xml_escape | truncatewords: site.excerpt_length }}
+        {% assign excerpt_word_count = post.excerpt | number_of_words %}
+        {% if post.content != post.excerpt or excerpt_word_count > site.excerpt_length %}
+          <a href="{{ post.url | prepend: site.baseurl }}" class="post-read-more">[Read&nbsp;More]</a>
+        {% endif %}
+      </div>
     </div>
 
     {% if post.tags.size > 0 %}