Add Knocket live chat service (#970)

_config.yml

@@ -886,6 +886,13 @@ tidio:
   enable: false
   key: # Public Key, get it from dashboard. See: https://www.tidio.com/panel/settings/developer
 
+# Knocket is a 100% free live chat widget by Tencent RTC.
+# For more information: https://trtc.io/solutions/knocket
+knocket:
+  enable: false
+  async: true
+  identifier: # Get it from https://trtc.io/solutions/knocket
+
 
 # ---------------------------------------------------------------
 # CDN Settings

layout/_third-party/chat/knocket.njk

@@ -0,0 +1,5 @@
+{#- Knocket live chat — https://trtc.io/solutions/knocket -#}
+{#- Free-forever live chat widget. Get your identifier at https://trtc.io/solutions/knocket -#}
+{%- if theme.knocket.identifier %}
+<script{{ ' async' if theme.knocket.async }} src="https://trtc.io/knocket-sdk/sdk.js?identifier={{ theme.knocket.identifier }}"></script>
+{%- endif %}

layout/_third-party/index.njk

@@ -8,6 +8,8 @@
   {%- include 'chat/chatra.njk' -%}
 {%- elif theme.tidio.enable %}
   {%- include 'chat/tidio.njk' -%}
+{%- elif theme.knocket.enable %}
+  {%- include 'chat/knocket.njk' -%}
 {%- endif %}
 
 {%- include 'tags/pdf.njk' -%}