mirror of
https://github.com/meshtastic/Meshtastic-Android.git
synced 2026-04-20 22:23:37 +00:00
76 lines
2.9 KiB
Kotlin
76 lines
2.9 KiB
Kotlin
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package com.geeksville.mesh.model
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import android.graphics.Bitmap
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import android.net.Uri
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import android.util.Base64
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import com.geeksville.mesh.AppOnlyProtos
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import com.geeksville.mesh.MeshProtos
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import com.google.protobuf.ByteString
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import com.google.zxing.BarcodeFormat
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import com.google.zxing.MultiFormatWriter
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import com.journeyapps.barcodescanner.BarcodeEncoder
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import java.net.MalformedURLException
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/** Utility function to make it easy to declare byte arrays - FIXME move someplace better */
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fun byteArrayOfInts(vararg ints: Int) = ByteArray(ints.size) { pos -> ints[pos].toByte() }
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data class ChannelSet(
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val protobuf: AppOnlyProtos.ChannelSet = AppOnlyProtos.ChannelSet.getDefaultInstance()
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) {
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companion object {
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// Placeholder when emulating
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val emulated = ChannelSet(
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AppOnlyProtos.ChannelSet.newBuilder().addSettings(Channel.emulated.settings).build()
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)
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const val prefix = "https://www.meshtastic.org/d/#"
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private const val base64Flags = Base64.URL_SAFE + Base64.NO_WRAP + Base64.NO_PADDING
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private fun urlToChannels(url: Uri): AppOnlyProtos.ChannelSet {
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val urlStr = url.toString()
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// We no longer support the super old (about 0.8ish? verison of the URLs that don't use the # separator - I doubt
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// anyone is still using that old format
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val pathRegex = Regex("$prefix(.*)", RegexOption.IGNORE_CASE)
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val (base64) = pathRegex.find(urlStr)?.destructured
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?: throw MalformedURLException("Not a meshtastic URL: ${urlStr.take(40)}")
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val bytes = Base64.decode(base64, base64Flags)
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return AppOnlyProtos.ChannelSet.parseFrom(bytes)
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}
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}
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constructor(url: Uri) : this(urlToChannels(url))
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/// Can this channel be changed right now?
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var editable = false
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/// Return an URL that represents the current channel values
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/// @param upperCasePrefix - portions of the URL can be upper case to make for more efficient QR codes
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fun getChannelUrl(upperCasePrefix: Boolean = false): Uri {
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// If we have a valid radio config use it, othterwise use whatever we have saved in the prefs
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val channelBytes = protobuf.toByteArray() ?: ByteArray(0) // if unset just use empty
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val enc = Base64.encodeToString(channelBytes, base64Flags)
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val p = if(upperCasePrefix)
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prefix.toUpperCase()
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else
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prefix
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return Uri.parse("$p$enc")
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}
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fun getChannelQR(): Bitmap {
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val multiFormatWriter = MultiFormatWriter()
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// We encode as UPPER case for the QR code URL because QR codes are more efficient for that special case
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val bitMatrix =
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multiFormatWriter.encode(getChannelUrl(true).toString(), BarcodeFormat.QR_CODE, 192, 192);
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val barcodeEncoder = BarcodeEncoder()
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return barcodeEncoder.createBitmap(bitMatrix)
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}
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}
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