From 87f737b8a38454c674d786674af7669cc808e0c9 Mon Sep 17 00:00:00 2001
From: "J. Ryan Stinnett" <jryans@gmail.com>
Date: Thu, 2 May 2019 11:48:32 +0100
Subject: [PATCH] Increment an existing reaction

This allows you to increment an existing reaction below a message by clicking on
it.

At the moment, this is not linked to the action bar, so they each are using
local state. We'll likely want to add some mechanism so that we can local echo
to both of these UI areas at the same time, but that can be done separately.

Fixes https://github.com/vector-im/riot-web/issues/9486
---
 .../views/messages/_ReactionsRowButton.scss   |  6 ++++
 res/themes/dark/css/_dark.scss                |  2 ++
 res/themes/light/css/_light.scss              |  2 ++
 .../views/messages/ReactionsRowButton.js      | 36 +++++++++++++++++--
 4 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/res/css/views/messages/_ReactionsRowButton.scss b/res/css/views/messages/_ReactionsRowButton.scss
index 9cbf839f21f..49e39309790 100644
--- a/res/css/views/messages/_ReactionsRowButton.scss
+++ b/res/css/views/messages/_ReactionsRowButton.scss
@@ -23,8 +23,14 @@ limitations under the License.
     border: 1px solid $reaction-row-button-border-color;
     border-radius: 10px;
     background-color: $reaction-row-button-bg-color;
+    cursor: pointer;
 
     &:hover {
         border-color: $reaction-row-button-hover-border-color;
     }
+
+    &.mx_ReactionsRowButton_selected {
+        background-color: $reaction-row-button-selected-bg-color;
+        border-color: $reaction-row-button-selected-border-color;
+    }
 }
diff --git a/res/themes/dark/css/_dark.scss b/res/themes/dark/css/_dark.scss
index 30066c7af48..592b1a1887b 100644
--- a/res/themes/dark/css/_dark.scss
+++ b/res/themes/dark/css/_dark.scss
@@ -154,6 +154,8 @@ $message-action-bar-hover-border-color: $header-panel-text-primary-color;
 $reaction-row-button-bg-color: $header-panel-bg-color;
 $reaction-row-button-border-color: #616b7f;
 $reaction-row-button-hover-border-color: $header-panel-text-primary-color;
+$reaction-row-button-selected-bg-color: #1f6954;
+$reaction-row-button-selected-border-color: $accent-color;
 
 // ***** Mixins! *****
 
diff --git a/res/themes/light/css/_light.scss b/res/themes/light/css/_light.scss
index 223d0fc80c1..adadd39333e 100644
--- a/res/themes/light/css/_light.scss
+++ b/res/themes/light/css/_light.scss
@@ -262,6 +262,8 @@ $message-action-bar-hover-border-color: #b8c1d2;
 $reaction-row-button-bg-color: $header-panel-bg-color;
 $reaction-row-button-border-color: #e9edf1;
 $reaction-row-button-hover-border-color: #bebebe;
+$reaction-row-button-selected-bg-color: #e9fff9;
+$reaction-row-button-selected-border-color: $accent-color;
 
 // ***** Mixins! *****
 
diff --git a/src/components/views/messages/ReactionsRowButton.js b/src/components/views/messages/ReactionsRowButton.js
index 4afcf93fff2..985479a2371 100644
--- a/src/components/views/messages/ReactionsRowButton.js
+++ b/src/components/views/messages/ReactionsRowButton.js
@@ -16,6 +16,7 @@ limitations under the License.
 
 import React from 'react';
 import PropTypes from 'prop-types';
+import classNames from 'classnames';
 
 export default class ReactionsRowButton extends React.PureComponent {
     static propTypes = {
@@ -23,11 +24,42 @@ export default class ReactionsRowButton extends React.PureComponent {
         count: PropTypes.number.isRequired,
     }
 
+    constructor(props) {
+        super(props);
+
+        // TODO: This should be derived from actual reactions you may have sent
+        // once we have some API to read them.
+        this.state = {
+            selected: false,
+        };
+    }
+
+    onClick = (ev) => {
+        const state = this.state.selected;
+        this.setState({
+            selected: !state,
+        });
+        // TODO: Send the reaction event
+    };
+
     render() {
         const { content, count } = this.props;
+        const { selected } = this.state;
+
+        const classes = classNames({
+            mx_ReactionsRowButton: true,
+            mx_ReactionsRowButton_selected: selected,
+        });
+
+        let adjustedCount = count;
+        if (selected) {
+            adjustedCount++;
+        }
 
-        return <span className="mx_ReactionsRowButton">
-            {content} {count}
+        return <span className={classes}
+            onClick={this.onClick}
+        >
+            {content} {adjustedCount}
         </span>;
     }
 }