1 files changed, 106 insertions, 0 deletions
diff --git a/merchant-terminal/src/main/java/net/taler/merchantpos/history/HistoryManager.kt b/merchant-terminal/src/main/java/net/taler/merchantpos/history/HistoryManager.kt
new file mode 100644
index 0000000..594e7cc
--- /dev/null
+++ b/merchant-terminal/src/main/java/net/taler/merchantpos/history/HistoryManager.kt
@@ -0,0 +1,106 @@
+/*
+ * 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.history
+
+import android.util.Log
+import androidx.annotation.UiThread
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import com.android.volley.Request.Method.GET
+import com.android.volley.Request.Method.POST
+import com.android.volley.RequestQueue
+import com.android.volley.Response.ErrorListener
+import com.android.volley.Response.Listener
+import com.fasterxml.jackson.annotation.JsonIgnore
+import com.fasterxml.jackson.annotation.JsonInclude
+import com.fasterxml.jackson.annotation.JsonInclude.Include.NON_EMPTY
+import com.fasterxml.jackson.annotation.JsonProperty
+import com.fasterxml.jackson.databind.ObjectMapper
+import com.fasterxml.jackson.module.kotlin.readValue
+import net.taler.merchantpos.Amount
+import net.taler.merchantpos.config.ConfigManager
+import net.taler.merchantpos.config.MerchantRequest
+import org.json.JSONObject
+
+@JsonInclude(NON_EMPTY)
+class Timestamp(
+    @JsonProperty("t_ms")
+    val ms: Long
+)
+
+data class HistoryItem(
+    @JsonProperty("order_id")
+    val orderId: String,
+    @JsonProperty("amount")
+    val amountStr: String,
+    val summary: String,
+    val timestamp: Timestamp
+) {
+    @get:JsonIgnore
+    val amount: Amount by lazy { Amount.fromString(amountStr) }
+
+    @get:JsonIgnore
+    val time = timestamp.ms
+}
+
+sealed class HistoryResult {
+    object Error : HistoryResult()
+    class Success(val items: List<HistoryItem>) : HistoryResult()
+}
+
+class HistoryManager(
+    private val configManager: ConfigManager,
+    private val queue: RequestQueue,
+    private val mapper: ObjectMapper
+) {
+
+    private val mIsLoading = MutableLiveData(false)
+    val isLoading: LiveData<Boolean> = mIsLoading
+
+    private val mItems = MutableLiveData<HistoryResult>()
+    val items: LiveData<HistoryResult> = mItems
+
+    @UiThread
+    internal fun fetchHistory() {
+        mIsLoading.value = true
+        val merchantConfig = configManager.merchantConfig!!
+        val params = mapOf("instance" to merchantConfig.instance)
+        val req = MerchantRequest(GET, merchantConfig, "history", params, null,
+            Listener { onHistoryResponse(it) },
+            ErrorListener { onHistoryError() })
+        queue.add(req)
+    }
+
+    @UiThread
+    private fun onHistoryResponse(body: JSONObject) {
+        mIsLoading.value = false
+        val items = arrayListOf<HistoryItem>()
+        val historyJson = body.getJSONArray("history")
+        for (i in 0 until historyJson.length()) {
+            val historyItem: HistoryItem = mapper.readValue(historyJson.getString(i))
+            items.add(historyItem)
+        }
+        mItems.value = HistoryResult.Success(items)
+    }
+
+    @UiThread
+    private fun onHistoryError() {
+        mIsLoading.value = false
+        mItems.value = HistoryResult.Error
+    }
+
+}