@prismadelabs/prismaid NPM

Web SDK

Purpose

The PrismaSDK is intended to be used in a web application and collect signals created by a PrismaID tag. The PrismaSDK will internally talk to the Prismade Decoder Backend and decode that signal. The result is sent back to the application through a callback. In addition to information related to the decoded data, there are events for user interaction and potential hints to improve reading results.

Install

npm install @prismadelabs/prismaid

Usage

At the moment we provided two minimalistic samples how to use the Web SDK in

Javascript application
Ionic application

Use SDK in Javascript application

It is assumed that one is experienced to create a web application, so we will not go too much into detail here. The SDK needs to collect raw touch events from any HTML element, in our example a canvas. Therefore, we will need a simple HTML page with a canvas. Secondly, the page has to include our JavaScript sample file.

# index.html

<!DOCTYPE html>
<html lang="en" dir="ltr">

<head>
    <meta charset="UTF-8">
    <title>Prisma SDK</title>
    <meta name="viewport" content="viewport-fit=cover, width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
</head>

<body>
    <canvas id="prismasdk" style="position: fixed; left: 10px; top: 10px; ">
    </canvas>

    <!-- The main bundle js is generated via browserify -->
    <script src="./bundle.js"></script>
</body>

</html>

# main.js

const pl = require("@prismadelabs/prismaid")

const canvas = document.getElementById("prismasdk")
canvas.width = window.innerWidth - 20
canvas.height = window.innerHeight - 20

const sdk = new pl.PrismaSDK("YOUR_API_KEY")  
const version = "Prisma SDK version " + pl.PrismaSDK.version()

const ctx = canvas.getContext("2d")
ctx.fillStyle = "blue"
ctx.fillRect(0, 0, canvas.width, canvas.height)
ctx.fillStyle = "white"
ctx.font = "15px Arial"
ctx.fillText(version , 10, 20)

sdk.getDetectionSuccessSubject().subscribe((response) => {
    console.log("*) detection success:", response.description())

    ctx.fillStyle = "blue"
    ctx.fillRect( 10, 30, 100, 20)
    ctx.fillStyle = "white"
    ctx.fillText(`${response.codeId}-${response.direction}`, 10, 40)
})

sdk.getDetectionErrorSubject().subscribe((response) => {
    console.log("*) detection error:", response.description())

    response.hints.forEach((hint) => {
        console.log("*) hint:", hint.description())
    })
})

sdk.getInteractionSubject().subscribe((response) => {
    console.log("*) interaction event:", response.event, response.activeSignals)
})

sdk.getInitialisationSubject().subscribe((response) => {
    console.log("*) config data:", response.codeSetTypes, response.dpi, response.devicePixelRatio)
})

sdk.getProgressSubject().subscribe((response) => {
    console.log("*) progress:", response.progress)
})

sdk.getHintSubject().subscribe((response) => {
    console.log("*) hint:", response.code, response.message, response.type)
})

sdk.getConnectivitySubject().subscribe((response) => {
    console.log("*) connectivity:", response.status)
})

sdk.attachToElement(canvas)

...

Use SDK in Ionic application

It is assumed that one is experienced with Ionic applications, so we will not go into detail here. Learn more

# home.html

<ion-content>
	<canvas #canvas id="home"></canvas>
</ion-content>

import { Component, ElementRef, ViewChild } from "@angular/core"
import { NavController } from "ionic-angular"

import { CodeType, DecoderResponseError, DecoderResponseSuccess, HintResponse, InitialisationResponse, InteractionResponse, PrismaSDK, ProgressResponse, SwipeDirection, SwipingGesture } from "@prismadelabs/prismaid"

@Component({
    selector: "page-home",
    templateUrl: "home.html",
})

export class HomePage {
    @ViewChild("canvas")
    private canvasRef: ElementRef

    private sdk: PrismaSDK

    constructor(public navCtrl: NavController, private contentManager: ContentManager) {
    }

    private ionViewDidLoad() {
        console.log("ionViewDidLoad: HomePage")

        this.initialisePrismaSDK()
    }

    private initialisePrismaSDK() {
        this.sdk = new PrismaSDK("YOUR_API_KEY")

        this.sdk.getInitialisation().setExpectedCodeType(CodeType.Displacement)
        this.sdk.getInitialisation().setExpectedSwipingGesture(SwipingGesture.singleSwipe)

        this.sdk.getDetectionSuccessSubject().subscribe((response: DecoderResponseSuccess) => {
            console.log("*) callback success:", response.codeId, response.direction)
        })

        this.sdk.getDetectionErrorSubject().subscribe((response: DecoderResponseError) => {
            console.log("*) callback error:", response.description())

            response.hints.forEach((hint) => {
                console.log("*) hint:", hint.description())
            })
        })

        this.sdk.getInteractionSubject().subscribe((response: InteractionResponse) => {
            console.log("*) interaction:", response.event, response.activeSignals)
        })

        this.sdk.getInitialisationSubject().subscribe((response: InitialisationResponse) => {
            console.log("*) config data:", response.codeSetTypes, response.dpi, response.devicePixelRatio)
        })

        this.sdk.getProgressSubject().subscribe((response: ProgressResponse) => {
            console.log("*) progress:", response.progress, response.direction, response.swipeRound)
        })

        this.sdk.getHintSubject().subscribe((response: HintResponse) => {
            console.log("*) hint:", response.code, response.message, response.type)
        })

        this.sdk.attachToElement(this.canvasRef.nativeElement)
    }

    ....

abortcontroller-polyfill browser-locale detect-browser pako rxjs sha3 ts-md5

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@prismadelabs/prismaid v2.3.0

Web SDK

Purpose

Install

Usage

Table of Contents

Use SDK in Javascript application

Use SDK in Ionic application