❂ Objecture

 ⏣ Object Watcher, Property Manager
    ⊚ Capture property changes for object, array mutator methods.
    ⊚ Schematize and validate object, array properties.
    ⊚ Browser, NodeJS compatible.

 ⁘ Uses Core-Plex - Event Listener Management System.
 ⁜ Used by MVC Framework - Presentation Abtraction Control (PAC) Pattern.

Guide

⏣ Introduction

• Manage structured data models using familiar JS Object, Array, EventTarget APIs.
• Schematize data structures with property validators.
• Capture data model and validation events for property changes (including nested property events).

⏣ Impetus

• Frontend, backend applications require or benefit from structured data models with validatable schema.
• Detecting changes to structured through property events promotes event-driven application architecture.
• Few libraries offer both browser-and-Node-compatible schematized data models with validators or that nested property change events.

⏣ Impact

• Manage data models for primitive/object data types:
  • string, number, boolean, null primitives;
  • object, array.
• Schematize data models with property validators.
  • type, required, match, enum, range, length and custom validators.
• Capture data model events for any methods that modify data models.
  • Object Events:
    • assign, defineProperties/defineProperty, freeze, and seal events.
  • Array Events:
    • concat, copyWithin, fill, pop, push, reverse, shift, splice, and unshift events.
  • Map Events:
    • get, set, delete
• Capture validation events/data for array/object properties.
  • valid, nonvalid validProperty, nonvalidProperty events.
  • Schema validation object with report method.

⏣ Illustrations

• Model
• Schematized Model
• Ventilated Model
• Ventilated, Schematized Model (Nonvalid Literal)
• Ventilated, Schematized Model (Nonvalid Object)

import { Model, Schema } from 'objecture'

Model

• Example A.1.

const content = {
  propertyA: {
    propertyB: {
      propertyC: true
    }
  },
  propertyD: [{
    propertyE: { 
      propertyF: 1
    }
  }],
  propertyG: "TRUE"
}
const object = new Model(content)
console.log(object.toString({ space: 2, replacer: null }))
console.log("pass", object.toString() === JSON.stringify(content))

object.valueOf logs:

{
  "propertyA": {
    "propertyB": {
      "propertyC": true
    }
  },
  "propertyD": [
    {
      "propertyE": {
        "propertyF": 1
      }
    }
  ],
  "propertyG": "TRUE"
}

Schematized Model

• Example A.2.

const schema = {
  propertyA: {
    propertyB: {
      propertyC: Boolean
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: Number,
      propertyE: {
        propertyFFF: Number
      }
    }
  }],
  propertyG: String
}
const content = {
  propertyA: {
    propertyB: {
      propertyC: true
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: 1,
      propertyE: {
        propertyFFF: 1
      }
    }
  }],
  propertyG: true
}
const object = new Model(content, schema)
console.log(object.toString({ space: 2, replacer: null }))

object.toString logs:

{
  "propertyA": {
    "propertyB": {
      "propertyC": true
    }
  },
  "propertyD": [
    {
      "propertyE": {
        "propertyF": 1,
        "propertyE": {
          "propertyFFF": 1
        }
      }
    }
  ],
  "propertyG": "true"
}

(propertyG nonvalid)

Ventilated Model

• Example A.3.

function eventLog($event) {
  console.log($event.type, $event.path, JSON.stringify($event.value))
}
const content = {
  propertyA: {
    propertyB: {
      propertyC: true
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: 1
    }
  }],
  propertyG: "TRUE"
}
const object = new Model(content, null, {
  events: {
    'propertyA.propertyB setProperty': eventLog,
    'propertyA setProperty': eventLog,
    'setProperty': eventLog,
    'propertyD pushProp': eventLog,
    'propertyD.[0-9] set': eventLog,
    '** set': eventLog,
  },
  enableEvents: true
})
console.log(object.toString({ space: 2, replacer: null }))

logs

setProperty propertyA.propertyB.propertyC true
set propertyA.propertyB {
  "propertyC": true
}
setProperty propertyA.propertyB {
  "propertyC": true
}
set propertyA {
  "propertyB": {
    "propertyC": true
  }
}
setProperty propertyA {
  "propertyB": {
    "propertyC": true
  }
}
set propertyD.0.propertyE {
  "propertyF": 1
}
2set propertyD.0 {
  "propertyE": {
    "propertyF": 1
  }
}
set propertyD [
  {
    "propertyE": {
      "propertyF": 1
    }
  }
]
setProperty propertyD [
  {
    "propertyE": {
      "propertyF": 1
    }
  }
]
setProperty propertyG "TRUE"
set null {
  "propertyA": {
    "propertyB": {
      "propertyC": true
    }
  },
  "propertyD": [
    {
      "propertyE": {
        "propertyF": 1
      }
    }
  ],
  "propertyG": "TRUE"
}
{
  "propertyA": {
    "propertyB": {
      "propertyC": true
    }
  },
  "propertyD": [
    {
      "propertyE": {
        "propertyF": 1
      }
    }
  ],
  "propertyG": "TRUE"
}

Ventilated, Schematized Model (Nonvalid Literal)

• Example A.4.

const schema = new Schema({
  propertyA: {
    propertyB: {
      propertyC: Boolean
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: Number,
      propertyE: {
        propertyFFF: Number
      }
    }
  }],
  propertyG: Boolean
})
const content = {
  propertyA: {
    propertyB: {
      propertyC: true
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: 1,
      propertyE: {
        propertyFFF: 1
      }
    }
  }],
  propertyG: "true"
}
const object = new Model(content, schema, {
  events: {
    '** validProperty': eventLog,
    '** nonvalidProperty': eventLog,
  },
  enableEvents: true,
})
console.log(object.toString({ space: 2, replacer: null }))

logs

validProperty propertyA
validProperty propertyA.propertyB
validProperty propertyA.propertyB.propertyC
validProperty propertyD
validProperty propertyD.0
validProperty propertyD.0.propertyE
validProperty propertyD.0.propertyE.propertyF
validProperty propertyD.0.propertyE.propertyE
validProperty propertyD.0.propertyE.propertyE.propertyFFF
nonvalidProperty propertyG
{
  "propertyA": {
    "propertyB": {
      "propertyC": true
    }
  },
  "propertyD": [
    {
      "propertyE": {
        "propertyF": 1,
        "propertyE": {
          "propertyFFF": 1
        }
      }
    }
  ]
}

(propertyG nonvalid)

Ventilated, Schematized Model (Nonvalid Object)

• Example A.5.

const schema = new Schema({
  propertyA: {
    propertyB: {
      propertyC: Boolean
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: Number,
      propertyE: { required: true, type: {
        propertyFFF: Number,
        propertyGGG: Boolean,
      } },
      propertyFF: { required: true, type: Boolean },
    }
  }],
  propertyG: Boolean
})
const content = {
  propertyA: {
    propertyB: {
      propertyC: true
    }
  },
  propertyD: [{
    propertyE: {
      propertyF: 1,
      propertyE: {
        propertyFFF: "1",
        propertyGGG: "true",
      },
      propertyFF: true,
    }
  }, {
    propertyE: {
      propertyF: 1,
      propertyE: {
        propertyFFF: 1,
        propertyGGG: true,
      },
      propertyFF: true,
    }
  }],
  propertyG: true
}
const object = new Model(content, schema, {
  events: {
    '** validProperty': eventLog,
    '** nonvalidProperty': eventLog,
  },
  enableEvents: true,
})
console.log(object.toString({ space: 2, replacer: null }))

logs

validProperty propertyA
validProperty propertyA.propertyB
validProperty propertyA.propertyB.propertyC
validProperty propertyD
nonvalidProperty propertyD.0
validProperty propertyD.1
validProperty propertyD.1.propertyE
validProperty propertyD.1.propertyE.propertyF
validProperty propertyD.1.propertyE.propertyE
validProperty propertyD.1.propertyE.propertyE.propertyFFF
validProperty propertyD.1.propertyE.propertyE.propertyGGG
validProperty propertyD.1.propertyE.propertyFF
validProperty propertyG
{
  "propertyA": {
    "propertyB": {
      "propertyC": true
    }
  },
  "propertyD": [
    null,
    {
      "propertyE": {
        "propertyF": 1,
        "propertyE": {
          "propertyFFF": 1,
          "propertyGGG": true
        },
        "propertyFF": true
      }
    }
  ],
  "propertyG": true
}

(propertyD.0 nonvalid)