summaryrefslogtreecommitdiff
path: root/wallet/src/main/java/net/taler/wallet/MainViewModel.kt
blob: c69c31c0161d92f9e14f9e7fd4d15132058954a5 (plain)
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
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
/*
 * 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.wallet

import android.app.Application
import android.util.Log
import androidx.annotation.UiThread
import androidx.lifecycle.AndroidViewModel
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.distinctUntilChanged
import androidx.lifecycle.viewModelScope
import com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.kotlin.KotlinModule
import net.taler.common.Amount
import net.taler.common.Event
import net.taler.common.assertUiThread
import net.taler.common.toEvent
import net.taler.wallet.backend.WalletBackendApi
import net.taler.wallet.balances.BalanceItem
import net.taler.wallet.history.DevHistoryManager
import net.taler.wallet.payment.PaymentManager
import net.taler.wallet.pending.PendingOperationsManager
import net.taler.wallet.refund.RefundManager
import net.taler.wallet.transactions.TransactionManager
import net.taler.wallet.withdraw.WithdrawManager
import org.json.JSONObject
import java.util.concurrent.TimeUnit.DAYS
import java.util.concurrent.TimeUnit.MINUTES
import kotlin.random.Random

const val TAG = "taler-wallet"

private val transactionNotifications = listOf(
    "proposal-accepted",
    "refresh-revealed",
    "withdraw-group-finished"
)

class MainViewModel(val app: Application) : AndroidViewModel(app) {

    private val mBalances = MutableLiveData<Map<String, BalanceItem>>()
    val balances: LiveData<Map<String, BalanceItem>> = mBalances.distinctUntilChanged()

    val devMode = MutableLiveData(BuildConfig.DEBUG)
    val showProgressBar = MutableLiveData<Boolean>()
    var exchangeVersion: String? = null
        private set
    var merchantVersion: String? = null
        private set

    private val walletBackendApi = WalletBackendApi(app, {
        // nothing to do when we connect, balance will be requested by BalanceFragment in onStart()
    }) { payload ->
        if (payload.optString("operation") == "init") {
            val result = payload.getJSONObject("result")
            val versions = result.getJSONObject("supported_protocol_versions")
            exchangeVersion = versions.getString("exchange")
            merchantVersion = versions.getString("merchant")
        } else if (payload.getString("type") != "waiting-for-retry") {  // ignore ping
            Log.i(TAG, "Received notification from wallet-core: ${payload.toString(2)}")
            loadBalances()
            if (payload.optString("type") in transactionNotifications) {
                assertUiThread()
                // TODO notification API should give us a currency to update
                // update currently selected transaction list
                transactionManager.loadTransactions()
            }
            // refresh pending ops and history with each notification
            if (devMode.value == true) {
                pendingOperationsManager.getPending()
                historyManager.loadHistory()
            }
        }
    }

    private val mapper = ObjectMapper()
        .registerModule(KotlinModule())
        .configure(FAIL_ON_UNKNOWN_PROPERTIES, false)

    val withdrawManager = WithdrawManager(walletBackendApi)
    val paymentManager = PaymentManager(walletBackendApi, mapper)
    val pendingOperationsManager: PendingOperationsManager =
        PendingOperationsManager(walletBackendApi)
    val historyManager: DevHistoryManager =
        DevHistoryManager(walletBackendApi, viewModelScope, mapper)
    val transactionManager: TransactionManager =
        TransactionManager(walletBackendApi, viewModelScope, mapper)
    val refundManager = RefundManager(walletBackendApi)

    private val mTransactionsEvent = MutableLiveData<Event<String>>()
    val transactionsEvent: LiveData<Event<String>> = mTransactionsEvent

    private val mLastBackup = MutableLiveData(
        // fake backup time until we actually do backup
        System.currentTimeMillis() -
                Random.nextLong(MINUTES.toMillis(5), DAYS.toMillis(2))
    )
    val lastBackup: LiveData<Long> = mLastBackup

    override fun onCleared() {
        walletBackendApi.destroy()
        super.onCleared()
    }

    @UiThread
    fun loadBalances() {
        showProgressBar.value = true
        walletBackendApi.sendRequest("getBalances", null) { isError, result ->
            if (isError) {
                Log.e(TAG, "Error retrieving balances: ${result.toString(2)}")
                return@sendRequest
            }
            val balanceMap = HashMap<String, BalanceItem>()
            val byCurrency = result.getJSONObject("byCurrency")
            val currencyList = byCurrency.keys().asSequence().toList().sorted()
            for (currency in currencyList) {
                val jsonAmount = byCurrency.getJSONObject(currency)
                    .getJSONObject("available")
                val amount = Amount.fromJsonObject(jsonAmount)
                val jsonAmountIncoming = byCurrency.getJSONObject(currency)
                    .getJSONObject("pendingIncoming")
                val amountIncoming = Amount.fromJsonObject(jsonAmountIncoming)
                val hasPending = transactionManager.hasPending(currency)
                balanceMap[currency] = BalanceItem(amount, amountIncoming, hasPending)
            }
            mBalances.postValue(balanceMap)
            showProgressBar.postValue(false)
        }
    }

    /**
     * Navigates to the given currency's transaction list, when [MainFragment] is shown.
     */
    @UiThread
    fun showTransactions(currency: String) {
        mTransactionsEvent.value = currency.toEvent()
    }

    @UiThread
    fun dangerouslyReset() {
        walletBackendApi.sendRequest("reset", null)
        withdrawManager.testWithdrawalInProgress.value = false
        mBalances.value = emptyMap()
    }

    fun startTunnel() {
        walletBackendApi.sendRequest("startTunnel", null)
    }

    fun stopTunnel() {
        walletBackendApi.sendRequest("stopTunnel", null)
    }

    fun tunnelResponse(resp: String) {
        val respJson = JSONObject(resp)
        walletBackendApi.sendRequest("tunnelResponse", respJson)
    }

}