Captura no Ionic

Abra a captura a partir de um app Ionic com um plugin Capacitor local.

Markdown

Seu back-end cria o processo no Human Plugin com um fluxo Journey e um callbackUri que usa o URL scheme do seu app. Um plugin Capacitor local abre o link da resposta em Custom Tabs no Android e em ASWebAuthenticationSession no iOS. Quando a captura termina, o plugin resolve e o app assume o controle.

Guarde o id do Human Plugin retornado pelo create. Seu back-end lê o resultado com ele.

Pré-requisitos

• Ionic com Capacitor 4 ou superior
• Xcode 14 ou superior, e Android Studio
• Um URL scheme exclusivo do seu app, como myapp

1. Crie o processo com o seu scheme

Seu back-end envia o scheme como callbackUri:

{
  "flow": "humantoken",
  "clientId": "client-a",
  "correlationId": "order-1001",
  "credential": { "type": "DUI_TYPE_NG_BVN", "value": "<document number>" },
  "callbackUri": "myapp://callback"
}

e devolve id e link ao app.

2. Defina a interface do plugin

// src/plugins/capture-plugin.ts
import { registerPlugin } from '@capacitor/core';

export interface CapturePlugin {
  openSession(options: { url: string }): Promise<{ callbackUrl: string }>;
}

const Capture = registerPlugin<CapturePlugin>('CapturePlugin');
export default Capture;

3. Implemente o plugin iOS

import Capacitor
import AuthenticationServices

@objc(CapturePlugin)
public class CapturePlugin: CAPPlugin, ASWebAuthenticationPresentationContextProviding {
    private var session: ASWebAuthenticationSession?

    @objc func openSession(_ call: CAPPluginCall) {
        guard let urlString = call.getString("url"),
              let url = URL(string: urlString) else {
            call.reject("Invalid URL")
            return
        }

        DispatchQueue.main.async {
            let newSession = ASWebAuthenticationSession(
                url: url,
                callbackURLScheme: "myapp"
            ) { callbackURL, error in
                self.session = nil
                if let callbackURL = callbackURL {
                    call.resolve(["callbackUrl": callbackURL.absoluteString])
                } else {
                    call.reject(error?.localizedDescription ?? "Session cancelled")
                }
            }
            newSession.presentationContextProvider = self
            newSession.prefersEphemeralWebBrowserSession = true
            newSession.start()
            self.session = newSession
        }
    }

    public func presentationAnchor(for session: ASWebAuthenticationSession) -> ASPresentationAnchor {
        guard let windowScene = UIApplication.shared.connectedScenes.first as? UIWindowScene,
              let window = windowScene.windows.first else {
            return ASPresentationAnchor()
        }
        return window
    }
}

4. Implemente o plugin Android

import android.content.Intent
import android.net.Uri
import androidx.browser.customtabs.CustomTabsIntent
import com.getcapacitor.JSObject
import com.getcapacitor.Plugin
import com.getcapacitor.PluginCall
import com.getcapacitor.PluginMethod
import com.getcapacitor.annotation.CapacitorPlugin

@CapacitorPlugin(name = "CapturePlugin")
class CapturePlugin : Plugin() {

    private var pendingCall: PluginCall? = null

    @PluginMethod
    fun openSession(call: PluginCall) {
        val url = call.getString("url") ?: return call.reject("Missing URL")
        pendingCall = call

        activity.runOnUiThread {
            CustomTabsIntent.Builder().build()
                .launchUrl(activity, Uri.parse(url))
        }
    }

    override fun handleOnNewIntent(intent: Intent) {
        super.handleOnNewIntent(intent)
        intent.data?.let { uri ->
            if (uri.scheme == "myapp") {
                pendingCall?.resolve(JSObject().put("callbackUrl", uri.toString()))
                pendingCall = null
            }
        }
    }
}

5. Registre o seu scheme

iOS

No Info.plist:

<key>CFBundleURLTypes</key>
<array>
    <dict>
        <key>CFBundleURLSchemes</key>
        <array>
            <string>myapp</string>
        </array>
    </dict>
</array>

Android

No AndroidManifest.xml, dentro da sua <activity> principal:

<intent-filter>
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:scheme="myapp" android:host="callback" />
</intent-filter>

No build.gradle:

implementation("androidx.browser:browser:1.5.0")

6. Inicie a captura

Um serviço Angular em torno do plugin:

import { Injectable } from '@angular/core';
import Capture from '../plugins/capture-plugin';

@Injectable({ providedIn: 'root' })
export class CaptureService {
  /** Resolve true quando a captura terminou, false quando a pessoa a fechou. */
  async open(link: string): Promise<boolean> {
    try {
      await Capture.openSession({ url: link });
      return true;
    } catch {
      return false;
    }
  }
}

const ended = await this.captureService.open(link);
if (ended) {
  // A captura terminou. Peça ao seu back-end para ler o resultado
  // com GET /v1/processes/{id}, usando o id do Human Plugin.
}

Resumo

Arquivo	Finalidade
capture-plugin.ts	Interface do plugin Capacitor
CapturePlugin.swift	iOS: ASWebAuthenticationSession
CapturePlugin.kt	Android: Custom Tabs
Info.plist	URL scheme do iOS
AndroidManifest.xml	Intent filter do Android
capture.service.ts	Serviço Angular