1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
/*
* This file is part of GNU Taler
* (C) 2020 Taler Systems S.A.
*
* GNU Taler is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 3, or (at your option) any later version.
*
* GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
package net.taler.merchantpos
import android.content.Context
import android.text.format.DateUtils.DAY_IN_MILLIS
import android.text.format.DateUtils.FORMAT_ABBREV_MONTH
import android.text.format.DateUtils.FORMAT_ABBREV_RELATIVE
import android.text.format.DateUtils.FORMAT_NO_YEAR
import android.text.format.DateUtils.FORMAT_SHOW_DATE
import android.text.format.DateUtils.FORMAT_SHOW_TIME
import android.text.format.DateUtils.MINUTE_IN_MILLIS
import android.text.format.DateUtils.formatDateTime
import android.text.format.DateUtils.getRelativeTimeSpanString
import android.view.View
import android.view.View.INVISIBLE
import android.view.View.VISIBLE
import androidx.annotation.StringRes
import androidx.fragment.app.Fragment
import androidx.lifecycle.LiveData
import androidx.lifecycle.MediatorLiveData
import androidx.lifecycle.Observer
import androidx.navigation.NavController
import androidx.navigation.NavDirections
import androidx.navigation.fragment.findNavController
import com.google.android.material.snackbar.BaseTransientBottomBar.ANIMATION_MODE_FADE
import com.google.android.material.snackbar.BaseTransientBottomBar.Duration
import com.google.android.material.snackbar.Snackbar.make
object Utils {
private const val HEX_CHARS = "0123456789ABCDEF"
fun hexStringToByteArray(data: String): ByteArray {
val result = ByteArray(data.length / 2)
for (i in data.indices step 2) {
val firstIndex = HEX_CHARS.indexOf(data[i])
val secondIndex = HEX_CHARS.indexOf(data[i + 1])
val octet = firstIndex.shl(4).or(secondIndex)
result[i.shr(1)] = octet.toByte()
}
return result
}
private val HEX_CHARS_ARRAY = HEX_CHARS.toCharArray()
@Suppress("unused")
fun toHex(byteArray: ByteArray): String {
val result = StringBuffer()
byteArray.forEach {
val octet = it.toInt()
val firstIndex = (octet and 0xF0).ushr(4)
val secondIndex = octet and 0x0F
result.append(HEX_CHARS_ARRAY[firstIndex])
result.append(HEX_CHARS_ARRAY[secondIndex])
}
return result.toString()
}
}
fun View.fadeIn(endAction: () -> Unit = {}) {
if (visibility == VISIBLE) return
alpha = 0f
visibility = VISIBLE
animate().alpha(1f).withEndAction {
if (context != null) endAction.invoke()
}.start()
}
fun View.fadeOut(endAction: () -> Unit = {}) {
if (visibility == INVISIBLE) return
animate().alpha(0f).withEndAction {
if (context == null) return@withEndAction
visibility = INVISIBLE
alpha = 1f
endAction.invoke()
}.start()
}
fun topSnackbar(view: View, text: CharSequence, @Duration duration: Int) {
make(view, text, duration)
.setAnimationMode(ANIMATION_MODE_FADE)
.setAnchorView(R.id.navHostFragment)
.show()
}
fun topSnackbar(view: View, @StringRes resId: Int, @Duration duration: Int) {
topSnackbar(view, view.resources.getText(resId), duration)
}
fun NavDirections.navigate(nav: NavController) = nav.navigate(this)
fun Fragment.navigate(directions: NavDirections) = findNavController().navigate(directions)
fun Long.toRelativeTime(context: Context): CharSequence {
val now = System.currentTimeMillis()
return if (now - this > DAY_IN_MILLIS * 2) {
val flags = FORMAT_SHOW_TIME or FORMAT_SHOW_DATE or FORMAT_ABBREV_MONTH or FORMAT_NO_YEAR
formatDateTime(context, this, flags)
} else getRelativeTimeSpanString(this, now, MINUTE_IN_MILLIS, FORMAT_ABBREV_RELATIVE)
}
class CombinedLiveData<T, K, S>(
source1: LiveData<T>,
source2: LiveData<K>,
private val combine: (data1: T?, data2: K?) -> S
) : MediatorLiveData<S>() {
private var data1: T? = null
private var data2: K? = null
init {
super.addSource(source1) { t ->
data1 = t
value = combine(data1, data2)
}
super.addSource(source2) { k ->
data2 = k
value = combine(data1, data2)
}
}
override fun <S : Any?> addSource(source: LiveData<S>, onChanged: Observer<in S>) {
throw UnsupportedOperationException()
}
override fun <T : Any?> removeSource(toRemote: LiveData<T>) {
throw UnsupportedOperationException()
}
}
/**
* Use this with 'when' expressions when you need it to handle all possibilities/branches.
*/
val <T> T.exhaustive: T
get() = this
|
