support native nfc

packages/app/src/cores/nfc/nfc.core.js

@@ -1,40 +1,137 @@
 import Core from "evite/src/core"
 import TapShareDialog from "components/TapShare/Dialog"
-import { Nfc, NfcUtils, NfcTagTechType } from "@capawesome-team/capacitor-nfc"
+
+const RecordTypes = {
+    "T": "text",
+    "U": "url"
+}
+
+function decodePayload(record) {
+    let recordType = nfc.bytesToString(record.type)
+
+    let payload = {
+        recordId: nfc.bytesToHexString(record.id),
+        recordType: RecordTypes[recordType],
+        data: null
+    }
+
+    switch (recordType) {
+        case "T": {
+            let langCodeLength = record.payload[0]
+
+            payload.data = record.payload.slice((1 + langCodeLength), record.payload.length)
+
+            payload.data = nfc.bytesToString(text)
+
+            break
+        }
+        case "U": {
+            let identifierCode = record.payload.shift()
+
+            payload.data = nfc.bytesToString(record.payload)
+
+            switch (identifierCode) {
+                case 4: {
+                    payload.data = `https://${payload.data}`
+                    break
+                }
+                case 3: {
+                    payload.data = `http://${payload.data}`
+                    break
+                }
+            }
+
+            break
+        }
+        default: {
+            payload.data = nfc.bytesToString(record.payload)
+            break
+        }
+    }
+
+    return payload
+}
+
+function resolveSerialNumber(tag) {
+    let serialNumber = null
+
+    serialNumber = nfc.bytesToHexString(tag.id)
+
+    // transform serialNumber to contain a ":" every 2 bytes
+    serialNumber = serialNumber.replace(/(.{2})/g, "$1:")
+
+    // remove the last :
+    serialNumber = serialNumber.slice(0, -1)
+
+    return serialNumber
+}
+
+function parseNdefMessage(ndefMessage) {
+    let message = []
+
+    ndefMessage.forEach((ndefRecord) => {
+        message.push(decodePayload(ndefRecord))
+    })
+
+    return message
+}
 
 export default class NFC extends Core {
     static refName = "NFC"
 
     static namespace = "nfc"
 
+    isNativeMode = false
+
     instance = null
 
     subscribers = []
 
     public = {
-        incompatible: null,
+        incompatible: true,
         scanning: false,
-        startScanning: this.startScanning.bind(this),
+        writeNdef: this.writeNdef.bind(this),
         instance: function () { return this.instance }.bind(this),
         subscribe: this.subscribe.bind(this),
         unsubscribe: this.unsubscribe.bind(this),
     }
 
-    async onInitialize() {
-        if ("NDEFReader" in window === false) {
-            return this.public.incompatible = true
+    subscribe(callback) {
+        // check if scan service is available, if not try to initialize
+        if (this.public.scanning === false) {
+            this.startScanning()
         }
 
-        this.instance = new NDEFReader()
+        this.subscribers.push(callback)
+    }
 
-        this.startScanning()
+    unsubscribe(callback) {
+        this.subscribers = this.subscribers.filter((subscriber) => {
+            return subscriber !== callback
+        })
+    }
+
+    async onInitialize() {
+        if (window.nfc) {
+            this.instance = window.nfc
+
+            this.isNativeMode = true
+
+            return this.startNativeScanning()
+        }
+
+        if ("NDEFReader" in window) {
+            this.instance = new NDEFReader()
+
+            return this.startScanning()
+        }
+
+        return this.public.incompatible = true
     }
 
     async startScanning() {
         try {
-            //await navigator.permissions.query({ name: "nfc" })
-
-            this.instance.scan()
+            await this.instance.scan()
 
             this.public.scanning = true
             this.public.incompatible = false
@@ -48,23 +145,11 @@ export default class NFC extends Core {
         }
     }
 
-    subscribe(callback) {
-        // check if scan service is available, if not try to initialize
-        if (this.public.scanning === false) {
-            this.startScanning()
-        }
+    startNativeScanning() {
+        this.public.scanning = true
+        this.public.incompatible = false
 
-        this.subscribers.push(callback)
-
-        console.debug(`[NFC] SUBSCRIBED >`, this.subscribers.length)
-    }
-
-    unsubscribe(callback) {
-        this.subscribers = this.subscribers.filter((subscriber) => {
-            return subscriber !== callback
-        })
-
-        console.debug(`[NFC] UNSUBSCRIBED >`, this.subscribers.length)
+        return this.registerNativeEventListeners()
     }
 
     handleRead(tag) {
@@ -75,8 +160,6 @@ export default class NFC extends Core {
             subscriber(null, tag)
         })
 
-        console.log(this.subscribers)
-
         if (this.subscribers.length === 0) {
             if (tag.message.records?.length > 0) {
                 // open dialog
@@ -89,6 +172,32 @@ export default class NFC extends Core {
         }
     }
 
+    handleNativeRead(tag) {
+        console.debug(`[NFC] NATIVE READ >`, tag)
+
+        tag.serialNumber = resolveSerialNumber(tag)
+
+        if (tag.ndefMessage) {
+            tag.message = {}
+            tag.message.records = parseNdefMessage(tag.ndefMessage)
+        }
+
+        this.subscribers.forEach((subscriber) => {
+            subscriber(null, tag)
+        })
+
+        if (this.subscribers.length === 0 && tag.message?.records) {
+            if (tag.message.records?.length > 0) {
+                // open dialog
+                app.DrawerController.open("nfc_card_dialog", TapShareDialog, {
+                    componentProps: {
+                        tag: tag,
+                    }
+                })
+            }
+        }
+    }
+
     handleError(error) {
         this.subscribers.forEach((subscriber) => {
             subscriber(error, null)
@@ -99,4 +208,57 @@ export default class NFC extends Core {
         this.instance.addEventListener("reading", this.handleRead.bind(this))
         this.instance.addEventListener("error", this.handleError.bind(this))
     }
+
+    registerNativeEventListeners() {
+        nfc.addTagDiscoveredListener(
+            (e) => this.handleNativeRead(e.tag),
+            () => {
+                this.public.scanning = true
+                this.public.incompatible = false
+            },
+            this.handleError
+        )
+
+        nfc.addNdefListener(
+            (e) => this.handleNativeRead(e.tag),
+            () => {
+                this.public.scanning = true
+                this.public.incompatible = false
+            },
+            this.handleError
+        )
+    }
+
+    async writeNdef(payload, options) {
+        console.debug(`[NFC] WRITE >`, payload)
+
+        if (!this.isNativeMode) {
+            return this.instance.write(payload, options)
+        }
+
+        let message = []
+
+        const { records } = payload
+
+        if (!Array.isArray(records)) {
+            throw new Error("records must be an array")
+        }
+
+        for (const record of records) {
+            switch (record.recordType) {
+                case "text": {
+                    message.push(ndef.textRecord(record.data))
+                    break
+                }
+                case "url": {
+                    message.push(ndef.uriRecord(record.data))
+                    break
+                }
+            }
+        }
+
+        return await new Promise((resolve, reject) => {
+            this.instance.write(message, resolve, reject)
+        })
+    }
 }