APIM Fluid Scripts . These are policy transformation scripts. Use them to transform XML, JSON documents into JSON documents to match your platform requirements,

fluid-for-loop.xml

/*  
   @file  fluid-for-loop.xml
   @description  Use this script to convert an input array into json properties. Notice how a command is not added to the last item.
                  Use hyphen to strip extra blank chrs.
   @author ogarcia (ozkary) 
   @ref  https://shopify.dev/api/liquid/objects/for-loops
   
   Input JSON request:
    {
        "names": [
            {"name":"aaa", "value:"111"},
            {"name":"bbb", "value:"222"},
            {"name":"ccc", "value:"333"}
        ]
    }

   Output JSON request:
    {
       "names": {"aaa":"111", "bbb":"222", "ccc":"333"}
    }

*/

<set-body template="liquid">
     {%- for item in body.names -%}   
      { "names": {
              {%- if item.name -%}          
                  "{{item.name}}": "{{item.value}}",                      
              {%- endif -%} 
              {%- if forloop.last == false -%},{%- endif -%}                                    
        }
      }
      {%- endfor -%}    
  ]
  </set-body>

fluid-if.xml

/*  
   @file  fluid-if.xml
   @description  Use this script to transform a json document using conditional statements. Notice how empty values are filtered.
   @author ogarcia (ozkary) 
   @ref  https://shopify.github.io/liquid/basics/operators/
   
   Input JSON request:
    {
        "items": [
            {"name":"Burger", "price:"10"},
            {"name":"Frieds", "price:""},
            {"name":"Wings", "price:"20"}
        ]
    }

   Output JSON request of only valid items
    {
       "items": {"Burger":"10", "Wings":"20"}
    }

*/

<set-body template="liquid">
     {%- for item in body.names -%}   
      { "names": {
              {%- if item.value -%}          
                  "{{item.name}}": "{{item.value}}",                      
              {%- endif -%}
              {%- if forloop.last == false -%},{%- endif -%}                                    
        }
      }
      {%- endfor -%}    
  ]
  </set-body>

string-operations.xml

/*  
   @file  fluid-if.xml
   @description  Use this script to assign variables and do some string operations like replace, remove
   @author ogarcia (ozkary) 
   @ref  https://shopify.github.io/liquid/tags/variable/
   
   Input JSON request:
 { author" : 
     {
        "fullname":"Oscar Garcia",
        "bio": "Software engineer, **, Product developement ",
      }
 }
  

   Output JSON request of only valid items
{ author" : {
    {
       "firstName": "Oscar",
       "lastName": "Garcia",
        "bio": "Software engineer, *****, Product developement ",

    }
}
*/

<set-body template="liquid">
    <% assign author = body.author %>
    <% fullname = author.fullname | Split:" "%}    
    <% cleanBio = author.bio | Replace:", *****",""%}    
  { "author":
      {
       "firstName": "{{fullname[0]}}",
       "lastName": ""{{fullname[1]}}"",
        "bio": "{{cleanBio}}",

      }
  }
  </set-body>