From 96c086ea139047fc893ffb51843d3e24c5422c44 Mon Sep 17 00:00:00 2001
From: rabuzarus <rabuzarus@t-online.de>
Date: Fri, 16 Mar 2018 13:55:26 +0100
Subject: [PATCH] hashtag autocomplete

---
 src/Module/Hashtag.php  | 36 ++++++++++++++++++++++++++++++++++++
 view/js/autocomplete.js | 27 +++++++++++++++++++++++++--
 2 files changed, 61 insertions(+), 2 deletions(-)
 create mode 100644 src/Module/Hashtag.php

diff --git a/src/Module/Hashtag.php b/src/Module/Hashtag.php
new file mode 100644
index 000000000..879b27ea7
--- /dev/null
+++ b/src/Module/Hashtag.php
@@ -0,0 +1,36 @@
+<?php
+/**
+ * @file src/Module/Hashtag.php
+ */
+namespace Friendica\Module;
+
+use Friendica\BaseModule;
+use Friendica\Core\System;
+use dba;
+
+/**
+ * Hashtag module.
+ */
+class Hashtag extends BaseModule {
+
+	public static function init()
+{
+		$result = [];
+
+		$t = escape_tags($_REQUEST['t']);
+		if (empty($t)) {
+			System::jsonExit($result);
+		}
+
+		$taglist = dba::p("SELECT DISTINCT(`term`) FROM `term` WHERE `term` LIKE ? AND `type` = ? ORDER BY `term`",
+			$t . '%',
+			intval(TERM_HASHTAG)
+		);
+		while ($tag = dba::fetch($taglist)) {
+			$result[] = ['text' => strtolower($tag['term'])];
+		}
+		dba::close($taglist);
+
+		System::jsonExit($result);
+	}
+}
diff --git a/view/js/autocomplete.js b/view/js/autocomplete.js
index 219ad794b..eb9d5efbe 100644
--- a/view/js/autocomplete.js
+++ b/view/js/autocomplete.js
@@ -77,6 +77,10 @@ function contact_format(item) {
 		return "<div>" + item.text + "</div>";
 }
 
+function tag_format(item) {
+	return "<div class='dropdown-item'>" + '#' + item.text + "</div>";
+}
+
 function editor_replace(item) {
 	if (typeof item.replace !== 'undefined') {
 		return '$1$2' + item.replace;
@@ -212,6 +216,15 @@ function string2bb(element) {
 			template: contact_format,
 		};
 
+		// Autocomplete hashtags
+		tags = {
+			match: /(^|\s)(\#)([^ \n]{2,})$/,
+			index: 3,
+			search: function(term, callback) { $.getJSON(baseurl + '/hashtag/' + '?f=&t=' + term).done(function(data) { callback($.map(data, function(entry) { return entry.text.indexOf(term) === 0 ? entry : null; })); }); },
+			replace: function(item) { return "$1$2" + item.text + ' '; },
+			template: tag_format
+		};
+
 		// Autocomplete smilies e.g. ":like"
 		smilies = {
 			match: /(^|\s)(:[a-z]{2,})$/,
@@ -222,7 +235,7 @@ function string2bb(element) {
 		};
 
 		this.attr('autocomplete','off');
-		this.textcomplete([contacts, forums, smilies], {className:'acpopup', zIndex:10000});
+		this.textcomplete([contacts, forums, smilies, tags], {className:'acpopup', zIndex:10000});
 	};
 })( jQuery );
 
@@ -248,8 +261,18 @@ function string2bb(element) {
 			replace: webbie_replace,
 			template: contact_format,
 		};
+
+		// Autocomplete hashtags
+		tags = {
+			match: /(^|\s)(\#)([^ \n]{2,})$/,
+			index: 3,
+			search: function(term, callback) { $.getJSON(baseurl + '/hashtag/' + '?f=&t=' + term).done(function(data) { callback($.map(data, function(entry) { return entry.text.indexOf(term) === 0 ? entry : null; })); }); },
+			replace: function(item) { return "$1$2" + item.text; },
+			template: tag_format
+		};
+
 		this.attr('autocomplete', 'off');
-		var a = this.textcomplete([contacts, community], {className:'acpopup', maxCount:100, zIndex: 10000, appendTo:'nav'});
+		var a = this.textcomplete([contacts, community, tags], {className:'acpopup', maxCount:100, zIndex: 10000, appendTo:'nav'});
 		a.on('textComplete:select', function(e, value, strategy) { submit_form(this); });
 	};
 })( jQuery );