feature #14: Add routes for get follows of one citizen

src/main/resources/sql/functions/follow/find_follows_article_by_citizen.sql

@@ -0,0 +1,26 @@
+create or replace function find_follows_article_by_citizen(
+    _citizen_id uuid,
+    "limit" int default 50,
+    "offset" int default 0,
+    out resource json,
+    out total int
+) language plpgsql as
+$$
+begin
+    select json_agg(t), (select count(id) from follow)
+    into resource, total
+    from (
+        select
+            f.*,
+            find_article_by_id(f.target_id) as target,
+            find_citizen_by_id(f.citizen_id) as citizen
+        from follow as f
+        where citizen_id = _citizen_id
+        order by created_at desc,
+        f.created_at desc
+        limit "limit" offset "offset"
+    ) as t;
+end;
+$$;
+
+-- drop function if exists find_follows_article_by_citizen(uuid, int, int);

src/main/resources/sql/functions/follow/find_follows_by_citizen.sql

@@ -0,0 +1,26 @@
+create or replace function find_follows_by_citizen(
+    _citizen_id uuid,
+    "limit" int default 50,
+    "offset" int default 0,
+    out resource json,
+    out total int
+) language plpgsql as
+$$
+begin
+    select json_agg(t), (select count(id) from follow)
+    into resource, total
+    from (
+        select
+            f.*,
+            json_build_object('id', f.target_id) as target,
+            find_citizen_by_id(f.citizen_id) as citizen
+        from follow as f
+        where citizen_id = _citizen_id
+        order by created_at desc,
+        f.created_at desc
+        limit "limit" offset "offset"
+    ) as t;
+end;
+$$;
+
+-- drop function if exists find_follows_by_citizen(uuid, int, int);

src/main/resources/sql/functions/follow/find_follows_constitution_by_citizen.sql

@@ -0,0 +1,26 @@
+create or replace function find_follows_constitution_by_citizen(
+    _citizen_id uuid,
+    "limit" int default 50,
+    "offset" int default 0,
+    out resource json,
+    out total int
+) language plpgsql as
+$$
+begin
+    select json_agg(t), (select count(id) from follow)
+    into resource, total
+    from (
+        select
+            f.*,
+            find_constitution_by_id(f.target_id) as target,
+            find_citizen_by_id(f.citizen_id) as citizen
+        from follow as f
+        where citizen_id = _citizen_id
+        order by created_at desc,
+        f.created_at desc
+        limit "limit" offset "offset"
+    ) as t;
+end;
+$$;
+
+-- drop function if exists find_follows_constitution_by_citizen(uuid, int, int);