Add sort on comments -> findByTarget

src/main/resources/openApi.yaml

@@ -449,6 +449,22 @@ paths:
       tags:
         - comment
         - article
+      parameters:
+        - $ref: '#/components/parameters/page'
+        - $ref: '#/components/parameters/limit'
+        - $ref: '#/components/parameters/search'
+        - name: sort
+          in: query
+          required: false
+          example:
+            - created_at
+            - votes
+          schema:
+            type: string
+            default: created_at
+            enum:
+              - created_at
+              - votes
       responses:
         200:
           description: Return Comment and children

src/main/resources/sql/functions/comment/find_comments_by_target.sql

@@ -2,6 +2,7 @@ create or replace function find_comments_by_target(
     _target_id uuid,
     "limit" int default 50,
     "offset" int default 0,
+    "sort" text default 'created_at',
     out resource json,
     out total int
 ) language plpgsql as
@@ -18,7 +19,15 @@ begin
             count_vote(com.id) as votes
         from "comment" as com
         where com.target_id = _target_id
-        order by created_at asc,
+        order by
+            case sort
+                when 'votes' then (count_vote(com.id)->>'percent')::int
+                else null
+            end desc,
+            case sort
+                when 'created_at' then com.created_at::text
+                else null
+            end desc,
         com.created_at desc
         limit "limit" offset "offset"
     ) as t;

src/main/resources/sql/functions/vote/count_vote.sql

@@ -5,6 +5,7 @@ declare
     agg jsonb;
     empty jsonb = '{"down":0,"neutral":0,"up":0,"total":0,"score":0}'::jsonb;
     score int;
+    percent numeric;
     total int;
 begin
     select jsonb_object_agg(t.label, t.total)
@@ -25,12 +26,14 @@ begin
 
     agg = empty || coalesce(agg, empty);
     score = ((agg->>'up')::int - (agg->>'down')::int);
+    percent = ((agg->>'up')::int - (agg->>'down')::int);
     total = ((agg->>'up')::int + (agg->>'down')::int + (agg->>'neutral')::int);
 
     resource = agg ||
                jsonb_build_object('updated_at', now()) ||
                jsonb_build_object('total', total) ||
-               jsonb_build_object('score', score);
+               jsonb_build_object('score', score) ||
+               jsonb_build_object('percent', percent);
 end;
 $$;