Opengram arguments

The arguments plugin lets you parse & validate arguments of commands / inline query with ease.

Features

• Joi validation support
• Arguments remapping
• Inline query / Message / Channel posts support

Docs

You can find documentation here and examples here and try now here

Installation

NPM

npm i @opengram/arguments

Yarn

yarn add @opengram/arguments

PNPM

pnpm add @opengram/arguments

Quick start

const { Opengram } = require('opengram')
const bot = new Opengram(process.env.BOT_TOKEN)

const Joi = require('joi')
const arguments = require('@opengram/arguments')
  
// Create middleware instance
const sumArgs = arguments({
  mapping: ['first', 'second'], // First argument to "first" property, second to "second" property
  errorHandler: (err, ctx) => ctx.reply(`Invalid arguments: ${err.message}`), // Error handler for validation errors
  // Validation schema
  schema: Joi.object({
    first: Joi
      .number()
      .integer()
      .required(),
    second: Joi
      .number()
      .integer()
      .required()
  })
})

bot.command('sum', sumArgs, ctx => {
  // Destructuring assignment from safe, validated object, with converted to number args
  const { first, second } = ctx.state.args.result
  // Send sum result
  return ctx.replyWithHTML(`<b>Result:</b> ${first + second}`)
})

bot.launch()

Flowchart

flowchart TB
  U("Incoming update") --> M("Upstream middlewares")
  M --> F("Filter by given update types")
  F --> E("Has command entity?")
  E -- No --> N("Nothing to do, run next")
  E -- Yes --> Parsing --> HV("Need mapping?")
  HV -- No --> K
  HV -- Yes --> Mapping --> NV("Need validation?")
  NV -- No --> K
  NV -- Yes --> VC("Validate / cast") --> ISV("Valid?")
  ISV -- Yes --> K
  ISV -- No --> ER("Error handler")
  K("Add result to <code>ctx.state</code> and run next") --> DM("Downstream middlewares")

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License