Add --from-post=<post_id> flag to create duplicate posts

README.md

@@ -1965,7 +1965,7 @@ wp post
 Creates a new post.
 
 ~~~
-wp post create [--post_author=<post_author>] [--post_date=<post_date>] [--post_date_gmt=<post_date_gmt>] [--post_content=<post_content>] [--post_content_filtered=<post_content_filtered>] [--post_title=<post_title>] [--post_excerpt=<post_excerpt>] [--post_status=<post_status>] [--post_type=<post_type>] [--comment_status=<comment_status>] [--ping_status=<ping_status>] [--post_password=<post_password>] [--post_name=<post_name>] [--to_ping=<to_ping>] [--pinged=<pinged>] [--post_modified=<post_modified>] [--post_modified_gmt=<post_modified_gmt>] [--post_parent=<post_parent>] [--menu_order=<menu_order>] [--post_mime_type=<post_mime_type>] [--guid=<guid>] [--post_category=<post_category>] [--tags_input=<tags_input>] [--tax_input=<tax_input>] [--meta_input=<meta_input>] [<file>] [--<field>=<value>] [--edit] [--porcelain]
+wp post create [--post_author=<post_author>] [--post_date=<post_date>] [--post_date_gmt=<post_date_gmt>] [--post_content=<post_content>] [--post_content_filtered=<post_content_filtered>] [--post_title=<post_title>] [--post_excerpt=<post_excerpt>] [--post_status=<post_status>] [--post_type=<post_type>] [--comment_status=<comment_status>] [--ping_status=<ping_status>] [--post_password=<post_password>] [--post_name=<post_name>] [--from-post=<post_id>] [--to_ping=<to_ping>] [--pinged=<pinged>] [--post_modified=<post_modified>] [--post_modified_gmt=<post_modified_gmt>] [--post_parent=<post_parent>] [--menu_order=<menu_order>] [--post_mime_type=<post_mime_type>] [--guid=<guid>] [--post_category=<post_category>] [--tags_input=<tags_input>] [--tax_input=<tax_input>] [--meta_input=<meta_input>] [<file>] [--<field>=<value>] [--edit] [--porcelain]
 ~~~
 
 **OPTIONS**
@@ -2009,6 +2009,9 @@ wp post create [--post_author=<post_author>] [--post_date=<post_date>] [--post_d
 	[--post_name=<post_name>]
 		The post name. Default is the sanitized post title when creating a new post.
 
+	[--from-post=<post_id>]
+		Post id of a post to be duplicated.
+
 	[--to_ping=<to_ping>]
 		Space or carriage return-separated list of URLs to ping. Default empty.
 
@@ -2079,6 +2082,10 @@ wp post create [--post_author=<post_author>] [--post_date=<post_date>] [--post_d
     $ wp post create --post_title='A post' --post_content='Just a small post.' --meta_input='{"key1":"value1","key2":"value2"}
     Success: Created post 1923.
 
+	# Create a duplicate post from existing posts.
+	$ wp post create --from-post=123 --post_title='Different Title'
+	Success: Created post 2350.
+
 
 
 ### wp post delete

features/post-create-duplicate.feature

@@ -0,0 +1,82 @@
+Feature: Create Duplicate WordPress post from existing posts.
+
+  Background:
+	Given a WP install
+
+  Scenario: Generate duplicate post.
+	When I run `wp term create category "Test Category" --porcelain`
+	Then save STDOUT as {TERM_ID}
+
+	When I run `wp term create post_tag "Test Tag" --porcelain`
+	Then save STDOUT as {TAG_ID}
+
+	When I run `wp post create --post_title='Test Duplicate Post' --post_category={TERM_ID} --porcelain`
+	And save STDOUT as {POST_ID}
+
+	When I run `wp post term add {POST_ID} post_tag {TAG_ID} --by=id`
+	Then STDOUT should contain:
+      """
+      Success: Added term.
+      """
+
+	When I run `wp post create --from-post={POST_ID} --porcelain`
+	Then STDOUT should be a number
+	And save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post get {DUPLICATE_POST_ID} --field=title`
+	Then STDOUT should be:
+	  """
+	  Test Duplicate Post
+	  """
+
+	When I run `wp post term list {DUPLICATE_POST_ID} category --field=term_id`
+	Then STDOUT should be:
+      """
+      {TERM_ID}
+      """
+
+	When I run `wp post term list {DUPLICATE_POST_ID} post_tag --field=term_id`
+	Then STDOUT should be:
+      """
+      {TAG_ID}
+      """
+
+  @require-wp-4.4
+  Scenario: Generate duplicate post with post metadata.
+	When I run `wp post create --post_title='Test Post' --meta_input='{"key1":"value1","key2":"value2"}' --porcelain`
+	Then save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --porcelain`
+	Then save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post meta list {DUPLICATE_POST_ID} --format=table`
+	Then STDOUT should be a table containing rows:
+	  | post_id             | meta_key | meta_value |
+	  | {DUPLICATE_POST_ID} | key1     | value1     |
+	  | {DUPLICATE_POST_ID} | key2     | value2     |
+
+
+  Scenario: Generate duplicate page.
+	When I run `wp post create --post_type="page" --post_title="Test Page" --post_content="Page Content" --porcelain`
+	Then save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --post_title="Duplicate Page" --porcelain`
+	Then save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post list --post_type='page' --fields="title, content, type"`
+	Then STDOUT should be a table containing rows:
+	  | post_title     | post_content | post_type |
+	  | Test Page      | Page Content | page      |
+	  | Duplicate Page | Page Content | page      |
+
+  Scenario: Change type of duplicate post.
+	When I run `wp post create --post_title='Test Post' --porcelain`
+	Then save STDOUT as {POST_ID}
+
+	When I run `wp post create --from-post={POST_ID} --post_type=page --porcelain`
+	Then save STDOUT as {DUPLICATE_POST_ID}
+
+	When I run `wp post get {DUPLICATE_POST_ID} --fields=type`
+	Then STDOUT should be a table containing rows:
+	  | Field     | Value |
+	  | post_type | page  |

src/Post_Command.php

@@ -78,6 +78,9 @@ public function __construct() {
 	 * [--post_name=<post_name>]
 	 * : The post name. Default is the sanitized post title when creating a new post.
 	 *
+	 * [--from-post=<post_id>]
+	 * : Post id of a post to be duplicated.
+	 *
 	 * [--to_ping=<to_ping>]
 	 * : Space or carriage return-separated list of URLs to ping. Default empty.
 	 *
@@ -147,6 +150,10 @@ public function __construct() {
 	 *     # Create a post with multiple meta values.
 	 *     $ wp post create --post_title='A post' --post_content='Just a small post.' --meta_input='{"key1":"value1","key2":"value2"}
 	 *     Success: Created post 1923.
+	 *
+	 *     # Create a duplicate post from existing posts.
+	 *     $ wp post create --from-post=123 --post_title='Different Title'
+	 *     Success: Created post 2350.
 	 */
 	public function create( $args, $assoc_args ) {
 		if ( ! empty( $args[0] ) ) {
@@ -173,6 +180,27 @@ public function create( $args, $assoc_args ) {
 		$array_arguments = array( 'meta_input' );
 		$assoc_args      = \WP_CLI\Utils\parse_shell_arrays( $assoc_args, $array_arguments );
 
+		if ( isset( $assoc_args['from-post'] ) ) {
+			$post     = $this->fetcher->get_check( $assoc_args['from-post'] );
+			$post_arr = get_object_vars( $post );
+			$post_id  = $post_arr['ID'];
+			unset( $post_arr['post_date'] );
+			unset( $post_arr['post_date_gmt'] );
+			unset( $post_arr['guid'] );
+			unset( $post_arr['ID'] );
+
+			if ( empty( $assoc_args['meta_input'] ) ) {
+				$assoc_args['meta_input'] = $this->get_metadata( $post_id );
+			}
+			if ( empty( $assoc_args['post_category'] ) ) {
+				$post_arr['post_category'] = $this->get_category( $post_id );
+			}
+			if ( empty( $assoc_args['tags_input'] ) ) {
+				$post_arr['tags_input'] = $this->get_tags( $post_id );
+			}
+			$assoc_args = array_merge( $post_arr, $assoc_args );
+		}
+
 		$assoc_args = wp_slash( $assoc_args );
 		parent::_create( $args, $assoc_args, function ( $params ) {
 			return wp_insert_post( $params, true );
@@ -797,4 +825,60 @@ private function get_category_ids( $arg ) {
 		// If no category ids found, return exploded array for compat with previous WP-CLI versions.
 		return $category_ids ? $category_ids : $categories;
 	}
+
+	/**
+	 * Get post metadata.
+	 *
+	 * @param $post_id ID of the post.
+	 *
+	 * @return array
+	 */
+	private function get_metadata( $post_id ) {
+		$metadata = get_metadata( 'post', $post_id );
+		$items    = array();
+		foreach ( $metadata as $key => $values ) {
+			foreach ( $values as $item_value ) {
+				$item_value  = maybe_unserialize( $item_value );
+				$items[$key] = $item_value;
+			}
+		}
+
+		return $items;
+	}
+
+	/**
+	 * Get Categories of a post.
+	 *
+	 * @param $post_id ID of the post.
+	 *
+	 * @return array
+	 */
+	private function get_category( $post_id ) {
+		$category_data = get_the_category( $post_id );
+		$category_arr  = array();
+		foreach ( $category_data as $cat ) {
+			array_push( $category_arr, $cat->term_id );
+		}
+
+		return $category_arr;
+	}
+
+	/**
+	 * Get Tags of a post.
+	 *
+	 * @param $post_id ID of the post.
+	 *
+	 * @return array
+	 */
+	private function get_tags( $post_id ) {
+		$tag_data = get_the_tags( $post_id );
+		$tag_arr  = array();
+		if ( $tag_data ) {
+			foreach ( $tag_data as $tag ) {
+				array_push( $tag_arr, $tag->slug );
+			}
+		}
+
+		return $tag_arr;
+	}
 }