[Dev] Problem creating an API call with an array

[Dinithi De Silva]

I am trying to develop an ESB connector for ToodleDo API v3. In that API, I
need to add an array of tasks with various parameters. The number of
parameters in one element of the array, can be different from other
elements.
The API call looks as below.

http://api.toodledo.com/3/tasks/add.php
        access_token=yourtoken
        tasks=[{"title"%3A"My
Task"}%2C{"title"%3A"Another"%2C"star"%3A"1"%2C"ref"%3A"98765"}%2C{"title"%3A""%2C"ref"%3A"1234"}]
        fields=folder,star


Tasks are added by creating a JSON object and submitting a POST to the API.
Also I need to encode the data before transferring via the URL.

I tried this operation by using javascript. I just tried with two
parameters in the array (Mandatory -title and optional - star). My code is
as below.

            <![CDATA[

                        var added = 0;
            var query = "";

                        var taskString = '{"tasks":' + 
mc.getProperty('uri.var.tasks') + '}';

           if (mc.getProperty('uri.var.tasks') != null &&
mc.getProperty('uri.var.tasks') != "") {

                var taskObj = eval ("(" + taskString + ")");

                                if(Boolean(added)) {
                                    query = query + ',"tasks":[';
                            }else {
                                query = query + '"tasks":[';
                                added = 1;
                            }

                var count = 0;
                            for (var i in taskObj.tasks) {
                    if (taskObj.tasks.hasOwnProperty(i)) {
                        if(count == 0 ) {
                            query=query +
'{\"title\":\"'+mc.getProperty('uri.var.title')+'\",';
                            query=query +
'{\"star\":\"'+mc.getProperty('uri.var.star')+'\"}';
                            count =1;
                        }else {
                            query=query +
',{\"title\":\"'+mc.getProperty('uri.var.title')+'\",';
                            query=query +
'{\"star\":\"'+mc.getProperty('uri.var.star')+'\"}';
                        }

                    }
                }

                query = query + ']';

                var encoded_query= encodeURIComponent(query);
                        }
                        mc.setProperty('uri.var.encoded_query', encoded_query);

                ]]>
        </script>


And I have wrritten the payload factory as below.

<payloadFactory media-type="xml">
            <format>
                <xform>
                    <access_token>$1</access_token>
                    <tasks>$2</tasks>
                    <fields>$3</fields>
                </xform>
                <!--{                    "access_token" : "$1",
            "tasks" : "$2"                    "fields" : "$3"
      }-->
            </format>
            <args>
                <arg expression="$func:access_token" />
                <arg expression="get-property('uri.var.encoded_query')" />
                <arg expression="$func:fields" />
            </args></payloadFactory>



But it gives me an error as below.

[2014-09-10 22:39:22,129] ERROR - SynapseJsonPath #stringValueOf. Error
evaluating JSON Path <$.access_token>. Returning empty result. Error>>>
Unexpected character ({) at position 96.
[2014-09-10 22:39:22,130] ERROR - SynapseJsonPath #stringValueOf. Error
evaluating JSON Path <$.tasks>. Returning empty result. Error>>> Unexpected
character ({) at position 96.
[2014-09-10 22:39:22,130] ERROR - SynapseJsonPath #stringValueOf. Error
evaluating JSON Path <$.fields>. Returning empty result. Error>>>
Unexpected character ({) at position 96.
[2014-09-10 22:39:22,132] ERROR - ScriptMediator Failed to get the JSON
payload from the input stream. Error>>>
com.google.gson.stream.MalformedJsonException: Expected name at line 1
column 101


What am I missing?
How can I modify this to work with all the optional parameters?

Thank you
Dinithi De Silva
Associate Software Engineer

Mob: +94 716 667 655

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