first draft

app/Resources/views/admin/blog/_form.html.twig

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+{#
+    By default, forms enable client-side validation. This means that you can't
+    test the server-side validation errors from the browser. To temporarily
+    disable this validation, add the 'novalidate' attribute:
+
+    {{ form_start(form, { attr: { novalidate: 'novalidate' } }) }}
+#}
+
+{% if show_confirmation|default(false) %}
+    {% set attr = {'data-confirmation': 'true'} %}
+    {{ include('blog/_delete_post_confirmation.html.twig') }}
+{% endif %}
+
+{{ form_start(form, { attr: attr|default({}) }) }}
+    {{ form_widget(form) }}
+
+    <input type="submit" value="{{ button_label|default('label.create_post'|trans) }}"
+           class="{{ button_css|default("btn btn-primary") }}" />
+
+    {% if include_back_to_home_link|default(false) %}
+        <a href="{{ path('admin_post_index') }}" class="btn btn-link">
+            {{ 'action.back_to_list'|trans }}
+        </a>
+    {% endif %}
+{{ form_end(form) }}

app/Resources/views/admin/blog/edit.html.twig

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+{% extends 'admin/layout.html.twig' %}
+
+{% block body_id 'admin_post_edit' %}
+
+{% block main %}
+    <h1>{{ 'title.edit_post'|trans({'%id%': post.id}) }}</h1>
+
+    {{ include('admin/blog/_form.html.twig', {
+        form: edit_form,
+        button_label: 'action.save'|trans,
+        include_back_to_home_link: true,
+    }, with_context = false) }}
+{% endblock %}
+
+{% block sidebar %}
+    <div class="section actions">
+        {{ include('admin/blog/_form.html.twig', {
+            form: delete_form,
+            button_label: 'action.delete_post'|trans,
+            button_css: 'btn btn-lg btn-block btn-danger',
+            show_confirmation: true,
+        }, with_context = false) }}
+    </div>
+
+    {{ parent() }}
+{% endblock %}

app/Resources/views/admin/blog/index.html.twig

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+{% extends 'admin/layout.html.twig' %}
+
+{% block body_id 'admin_post_index' %}
+
+{% block main %}
+    <h1>{{ 'title.post_list'|trans }}</h1>
+
+    <table class="table table-striped">
+        <thead>
+            <tr>
+                <th>{{ 'label.title'|trans }}</th>
+                <th><i class="fa fa-user"></i> {{ 'label.author'|trans }}</th>
+                <th><i class="fa fa-calendar"></i> {{ 'label.published_at'|trans }}</th>
+                <th><i class="fa fa-cogs"></i> {{ 'label.actions'|trans }}</th>
+            </tr>
+        </thead>
+        <tbody>
+        {% for post in posts %}
+            <tr>
+                <td>{{ post.title }}</td>
+                <td>{{ post.authorEmail }}</td>
+                {# it's not mandatory to set the timezone in localizeddate(). This is done to
+                   avoid errors when the 'intl' PHP extension is not available and the application
+                   is forced to use the limited "intl polyfill", which only supports UTC and GMT #}
+                <td>{% if post.publishedAt %}{{ post.publishedAt|localizeddate('short', 'short', null, 'UTC') }}{% endif %}</td>
+                <td>
+                    <div class="item-actions">
+                        <a href="{{ path('admin_post_show', { id: post.id }) }}" class="btn btn-sm btn-default">
+                            {{ 'action.show'|trans }}
+                        </a>
+
+                        {% if post.isAuthor(app.user) %}
+                            <a href="{{ path('admin_post_edit', { id: post.id }) }}" class="btn btn-sm btn-primary">
+                                <i class="fa fa-edit"></i> {{ 'action.edit'|trans }}
+                            </a>
+                        {% endif %}
+                    </div>
+                </td>
+            </tr>
+        {% else %}
+            <tr>
+                <td colspan="4" align="center">{{ 'post.no_posts_found'|trans }}</td>
+           </tr>
+        {% endfor %}
+        </tbody>
+    </table>
+{% endblock %}
+
+{% block sidebar %}
+    <div class="section actions">
+        <a href="{{ path('admin_post_new') }}" class="btn btn-lg btn-block btn-success">
+            <i class="fa fa-plus"></i> {{ 'action.create_post'|trans }}
+        </a>
+    </div>
+
+    {{ parent() }}
+{% endblock %}

app/Resources/views/admin/blog/new.html.twig

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+{% extends 'admin/layout.html.twig' %}
+
+{% block body_id 'admin_post_new' %}
+
+{% block main %}
+    <h1>{{ 'title.post_new'|trans }}</h1>
+
+    {{ form_start(form) }}
+        {{ form_row(form.title) }}
+        {{ form_row(form.summary) }}
+        {{ form_row(form.content) }}
+        {{ form_row(form.authorEmail) }}
+        {{ form_row(form.publishedAt) }}
+
+        <input type="submit" value="{{ 'label.create_post'|trans }}" class="btn btn-primary" />
+
+        {{ form_widget(form.saveAndCreateNew, { label: 'label.save_and_create_new', attr: { class: 'btn btn-primary' } }) }}
+
+        <a href="{{ path('admin_post_index') }}" class="btn btn-link">
+            {{ 'action.back_to_list'|trans }}
+        </a>
+    {{ form_end(form) }}
+{% endblock %}
+
+{% block sidebar %}
+    {{ parent() }}
+{% endblock %}

app/Resources/views/admin/blog/show.html.twig

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+{% extends 'admin/layout.html.twig' %}
+
+{% block body_id 'admin_post_show' %}
+
+{% block main %}
+    <h1>{{ post.title }}</h1>
+
+    <table class="table">
+        <tbody>
+            <tr>
+                <th>{{ 'label.summary'|trans }}</th>
+                <td>{{ post.summary|md2html }}</td>
+            </tr>
+            <tr>
+                <th>{{ 'label.content'|trans }}</th>
+                <td>{{ post.content|md2html }}</td>
+            </tr>
+            <tr>
+                <th>{{ 'label.author'|trans }}</th>
+                <td><p>{{ post.authorEmail }}</p></td>
+            </tr>
+            <tr>
+                <th>{{ 'label.published_at'|trans }}</th>
+                {# it's not mandatory to set the timezone in localizeddate(). This is done to
+                   avoid errors when the 'intl' PHP extension is not available and the application
+                   is forced to use the limited "intl polyfill", which only supports UTC and GMT #}
+                <td><p>{{ post.publishedAt|localizeddate('long', 'medium', null, 'UTC') }}</p></td>
+            </tr>
+        </tbody>
+    </table>
+{% endblock %}
+
+{% block sidebar %}
+    <div class="section">
+        <a href="{{ path('admin_post_edit', { id: post.id }) }}" class="btn btn-lg btn-block btn-success">
+            <i class="fa fa-edit"></i> {{ 'action.edit_contents'|trans }}
+        </a>
+    </div>
+
+    <div class="section">
+        {{ include('admin/blog/_form.html.twig', {
+            form: delete_form,
+            button_label: 'action.delete_post'|trans,
+            button_css: 'btn btn-lg btn-block btn-danger',
+            show_confirmation: true,
+        }, with_context = false) }}
+    </div>
+{% endblock %}

app/Resources/views/admin/layout.html.twig

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+{#
+   This is the base template of the all backend pages.
+   See http://symfony.com/doc/current/book/templating.html#template-inheritance-and-layouts
+#}
+{% extends 'base.html.twig' %}
+
+{% block header_navigation_links %}
+    {{ knp_menu_render('admin', {'template': 'menu/admin_menu.html.twig'}) }}
+{% endblock %}