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AvatarPlaceHolder: skip 05 for initials, and get hash from sha512

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Audric Ackermann 2020-09-18 10:48:55 +10:00
parent c660acc3e7
commit 60d3fc3f1d
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GPG Key ID: 999F434D76324AD4
1 changed files with 27 additions and 13 deletions
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40
src/org/thoughtcrime/securesms/loki/utilities/AvatarPlaceholderGenerator.kt
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@ -8,6 +8,8 @@ import android.text.TextUtils
import androidx.annotation.ColorInt
import androidx.core.graphics.ColorUtils
import network.loki.messenger.R
import java.math.BigInteger
import java.security.MessageDigest
import java.util.*
object AvatarPlaceholderGenerator {
@ -15,11 +17,29 @@ object AvatarPlaceholderGenerator {
private const val EMPTY_LABEL = "0";
fun getSHA512(input:String):String{
val md: MessageDigest = MessageDigest.getInstance("SHA-512")
val messageDigest = md.digest(input.toByteArray())
// Convert byte array into signum representation
val no = BigInteger(1, messageDigest)
// Convert message digest into hex value
var hashtext: String = no.toString(16)
// Add preceding 0s to make it 32 bit
while (hashtext.length < 32) {
hashtext = "0$hashtext"
}
// return the HashText
return hashtext
}
fun generate(context: Context, pixelSize: Int, hashString: String, displayName: String?): BitmapDrawable {
//TODO That should be replaced with a proper hash extraction code.
val hash: Long
if (hashString.length >= 12 && hashString.matches(Regex("^[0-9A-Fa-f]+\$"))) {
hash = hashString.substring(0 until 12).toLong(16)
hash = AvatarPlaceholderGenerator.getSHA512(hashString).substring(0 until 12).toLong(16)
} else {
hash = 0
}
@ -27,7 +47,6 @@ object AvatarPlaceholderGenerator {
// Do not cache color array, it may be different depends on the current theme.
val colorArray = context.resources.getIntArray(R.array.profile_picture_placeholder_colors)
val colorPrimary = colorArray[(hash % colorArray.size).toInt()]
val colorSecondary = changeColorHueBy(colorPrimary, 12f)
val labelText = when {
!TextUtils.isEmpty(displayName) -> extractLabel(displayName!!.capitalize())
@ -62,18 +81,13 @@ object AvatarPlaceholderGenerator {
return BitmapDrawable(context.resources, bitmap)
}
@ColorInt
private fun changeColorHueBy(@ColorInt color: Int, hueDelta: Float): Int {
val hslColor = tmpFloatArray
ColorUtils.colorToHSL(color, hslColor)
hslColor[0] = (hslColor[0] + hueDelta) % 360f
return ColorUtils.HSLToColor(hslColor)
}
private fun extractLabel(content: String): String {
var content = content.trim()
if (content.isEmpty()) return EMPTY_LABEL
return content.first().toString().toUpperCase(Locale.ROOT)
return if (content.length > 2 && content.startsWith("05")) {
content[2].toString().toUpperCase(Locale.ROOT)
} else {
content.first().toString().toUpperCase(Locale.ROOT)
}
}
}