kimtrien · May 17, 2023 01:05 · Jul 3, 2014 · Jul 3, 2014
diff --git a/display-read-time.php b/display-read-time.php
@@ -25,7 +25,7 @@ function rkv_display_read_time( $content ) {
 	$readprfx	= __( 'Estimated read time:', 'rkv-reading-time' );
 
 	// make a fancy box
-	$readbox	= '<p class="estimated-read-time"><strong>' . esc_attr( $readprfx ). '</strong> ' . esc_attr( $readtime ) . '</p>';
+	$readbox	= '<p class="estimated-read-time"><strong>' . esc_attr( $readprfx ) . '</strong> ' . esc_attr( $readtime ) . '</p>';
 
 	// send it back before the content
 	return $readbox.$content;

diff --git a/calc-read-time.php b/calc-read-time.php
@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * handle the calculation
+ * @param  integer $seconds [description]
+ * @return [type]           [description]
+ */
+function rkv_calc_read_time( $seconds = 0 ) {
+
+	// calc the minutes
+	$minutes	= floor( $seconds / 60 );
+
+	// if the time is less than a minute, return that
+	if ( $minutes < 1 ) {
+		return __( 'less than 1 minute', 'rkv-reading-time' );
+	} else {
+		return sprintf( _n( '%d minute', '%d minutes', $minutes, 'rkv-reading-time'), $minutes );
+	}
+
+}
diff --git a/display-read-time.php b/display-read-time.php
@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * display the estimated time to read the content
+ * @param  [type] $content [description]
+ * @return [type]          [description]
+ */
+function rkv_display_read_time( $content ) {
+
+	// fetch the global post object
+	global $post;
+
+	// check for our meta key
+	$seconds	= get_post_meta( $post->ID, '_seconds_read_time', true );
+
+	// bail without the key
+	if ( empty( $seconds ) ) {
+		return $content;
+	}
+
+	// get our calculation
+	$readtime	= rkv_calc_read_time( $seconds );
+
+	// create a prefix
+	$readprfx	= __( 'Estimated read time:', 'rkv-reading-time' );
+
+	// make a fancy box
+	$readbox	= '<p class="estimated-read-time"><strong>' . esc_attr( $readprfx ). '</strong> ' . esc_attr( $readtime ) . '</p>';
+
+	// send it back before the content
+	return $readbox.$content;
+
+}
+
+add_filter( 'the_content', 'rkv_display_read_time', 10 );
diff --git a/save-read-time.php b/save-read-time.php
@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * store the estimated time to read the content
+ * @param  integer $post_id [description]
+ * @return [type]           [description]
+ */
+function rkv_store_read_time( $post_id = 0 ) {
+
+	// run various checks to make sure we aren't doing anything weird
+	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
+		return $post_id;
+	}
+
+	// only save on posts. would probably set this to a filter
+	if ( get_post_type( $post_id ) != 'post' ) {
+		return $post_id;
+	}
+
+	// fetch the post content and get the word count
+	$content	= get_post_field( 'post_content', $post_id, 'raw' );
+	$wordnum	= str_word_count( strip_tags( $content ) );
+
+	// set the average reading time at 120 wpm
+	$avgtime	= apply_filters( 'rkv_estimated_reading_time', 120 );
+
+	// calc the total seconds to read
+	$seconds	= floor( (int) $wordnum / (int) $avgtime ) * 60;
+
+	// update the post meta
+	update_post_meta( $post_id, '_seconds_read_time', $seconds );
+
+}
+
+add_action( 'save_post', 'rkv_store_read_time' );