freemarker-to-json2.js

This module take a yaml file or a json file and convert it to a freemarker file that output the data as valid json format.

Example:

Convert this
``yaml
name: paul
id: 1
favorite:
- type: food
value: ramen
- type: drink
value: milk-tea
`

or
`json
{
"name": "paul",
"id": 1,
"favorite": [{
"type": "food",
"value": "ramen"
}, {
"type": "drink",
"value": "milk-tea"
}]
}
`

to
`ftl
{
"name": ${get(name)},

"id": ${get(id)},

"favorite":
<@arrayFrame favorite; item>{
"type": ${get(item, 'type')},

"value": ${get(item, 'value')}
}
}
`

which the get, arrayFrame is just a convenient way to transform ftl data to valid json.

`ftl
<#-- A simple helper to convert ftl data to valid json value -->
<#function value input="">
<#if input?is_number>
<#return input?c>

<#elseif input?is_boolean>
<#return input?string>

<#elseif input?is_string>
<#return '"' + input?js_string + '"'>

<#elseif input?is_date>
<#return '"' + input?string["yyyy/MM/dd HH:mm:ss"] + '"'>

<#-- A lodash.get alike helper -->
<#function get object="" path="" default='""'>
<#if object?is_hash && path != "">
<#local childs = path?split(".")>
<#list childs as child>
<#if object[child]??>
<#local object = object[child]>
<#else>
<#return default>




<#return value(object)>


<#-- A simple helper to wrap freemarker #list with json array -->
<#macro arrayFrame items=[]>
<#compress>
[
<#list items as item>
<#nested item><#if item_has_next>,

]


`

Usage

`js
const transform = require('freemarker-to-json2')

transform('input.yaml', 'output.ftl')
.then(result => console.log(result)) // same as output.ftl
`

Test

`sh
npm test
``