ruby-hash-with-or-without-rockets-to-javascript-object-notation-aka-json-style.rb

ruby-hash-with-or-without-rockets-to-javascript-object-notation-aka-json-style-howto-by-soawesomeman.rb

# ruby-hash-with-or-without-rockets-to-javascript-object-notation-aka-json-style.rb
# 
# - context: https://alwayscoding.ca/momentos/2012/06/15/ruby-hash-syntax-hashrocket-vs-json-style 
# - regex by SoAwesomeMane: https://rubular.com/r/9wlDeHLHejZvuB
# - regex research: https://sadique.io/blog/2013/09/29/named-capture-groups-in-regular-expressions
# - more regex research: https://www.regular-expressions.info/refquick.html "\k Named backreference"
# - json schema from https://www.liquid-technologies.com/online-json-to-schema-converter
# - 🍻🍻🍻

hash = {"$schema"=>"http://json-schema.org/draft-04/schema#",
 "type"=>"object",
 "properties"=>
  {"_id"=>{"type"=>"string"},
   "title"=>{"type"=>"string"},
   "attachment"=>{"type"=>"string"},
   "attachment_data"=>
    {"type"=>"object",
     "properties"=>
      {"id"=>{"type"=>"string"},
       "storage"=>{"type"=>"string"},
       "metadata"=>
        {"type"=>"object",
         "properties"=>{"filename"=>{"type"=>"string"}, "size"=>{"type"=>"integer"}, "mime_type"=>{"type"=>"string"}, "duration"=>{"type"=>"string"}},
         "required"=>["filename", "size", "mime_type", "duration"]}},
     "required"=>["id", "storage", "metadata"]}},
 "required"=>["_id", "title", "attachment", "attachment_data"]}


JSON.generate(hash).gsub(/(?<spaces>\s*)"(?<key>[^"]+)":/, '\k<spaces>\k<key>:')
# => "{$schema:\"http://json-schema.org/draft-04/schema#\",type:\"object\",properties:{_id:{type:\"string\"},title:{type:\"string\"},attachment:{type:\"string\"},attachment_data:{type:\"object\",properties:{id:{type:\"string\"},storage:{type:\"string\"},metadata:{type:\"object\",properties:{filename:{type:\"string\"},size:{type:\"integer\"},mime_type:{type:\"string\"},duration:{type:\"string\"}},required:[\"filename\",\"size\",\"mime_type\",\"duration\"]}},required:[\"id\",\"storage\",\"metadata\"]}},required:[\"_id\",\"title\",\"attachment\",\"attachment_data\"]}"


# use puts for maximum effect
pretty_str = JSON.pretty_generate(hash).gsub(/(?<spaces>\s*)"(?<key>[^"]+)":/, '\k<spaces>\k<key>:')
# => "{\n  $schema: \"http://json-schema.org/draft-04/schema#\",\n  type: \"object\",\n  properties: {\n    _id: {\n      type: \"string\"\n    },\n    title: {\n      type: \"string\"\n    },\n    attachment: {\n      type: \"string\"\n    },\n    attachment_data: {\n      type: \"object\",\n      properties: {\n        id: {\n          type: \"string\"\n        },\n        storage: {\n          type: \"string\"\n        },\n        metadata: {\n          type: \"object\",\n          properties: {\n            filename: {\n              type: \"string\"\n            },\n            size: {\n              type: \"integer\"\n            },\n            mime_type: {\n              type: \"string\"\n            },\n            duration: {\n              type: \"string\"\n            }\n          },\n          required: [\n            \"filename\",\n            \"size\",\n            \"mime_type\",\n            \"duration\"\n          ]\n        }\n      },\n      required: [\n        \"id\",\n        \"storage\",\n        \"metadata\"\n      ]\n    }\n  },\n  required: [\n    \"_id\",\n    \"title\",\n    \"attachment\",\n    \"attachment_data\"\n  ]\n}"

puts pretty_str
=begin
{
  $schema: "http://json-schema.org/draft-04/schema#",
  type: "object",
  properties: {
    _id: {
      type: "string"
    },
    title: {
      type: "string"
    },
    attachment: {
      type: "string"
    },
    attachment_data: {
      type: "object",
      properties: {
        id: {
          type: "string"
        },
        storage: {
          type: "string"
        },
        metadata: {
          type: "object",
          properties: {
            filename: {
              type: "string"
            },
            […]
required: [
  "_id",
  "title",
  "attachment",
  "attachment_data"
]
=end