Initial work for Anastasis integration

Signed-off-by: Iván Ávalos <avalos@disroot.org>

1 files changed, 99 insertions, 0 deletions

diff --git a/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt
new file mode 100644
index 0000000..4c649a6
--- /dev/null
+++ b/anastasis/src/main/java/net/taler/anastasis/ui/reusable/components/Picker.kt
@@ -0,0 +1,99 @@
+/*
+ * This file is part of GNU Taler
+ * (C) 2023 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.anastasis.ui.reusable.components
+
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.wrapContentSize
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.material3.DropdownMenuItem
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.ExposedDropdownMenuDefaults
+import androidx.compose.material3.OutlinedTextField
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.ExperimentalComposeUiApi
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalSoftwareKeyboardController
+import androidx.compose.ui.tooling.preview.Preview
+import net.taler.anastasis.ui.theme.LocalSpacing
+
+@OptIn(ExperimentalMaterial3Api::class, ExperimentalComposeUiApi::class)
+@Composable
+fun Picker(
+    modifier: Modifier = Modifier,
+    label: String,
+    options: Set<String>,
+    onOptionChanged: (String) -> Unit,
+) {
+    var filteredOptions by remember { mutableStateOf(options.toList()) }
+    var inputValue by remember { mutableStateOf(options.first()) }
+    val keyboardController = LocalSoftwareKeyboardController.current
+
+    Column(
+        modifier = modifier
+            .wrapContentSize(Alignment.Center)
+    ) {
+        OutlinedTextField(
+            modifier = Modifier.fillMaxWidth(),
+            value = inputValue,
+            onValueChange = { value ->
+                inputValue = value
+                filteredOptions = options.filter { it.contains(value) }
+            },
+            singleLine = true,
+            label = { Text(label) },
+            colors = ExposedDropdownMenuDefaults.textFieldColors()
+        )
+
+        if (filteredOptions.isNotEmpty()) {
+            Spacer(Modifier.height(LocalSpacing.current.medium))
+            LazyColumn(
+                modifier = Modifier.fillMaxWidth()
+            ) {
+                items(items = filteredOptions) {
+                    DropdownMenuItem(
+                        text = { Text(it) },
+                        onClick = {
+                            inputValue = it
+                            keyboardController?.hide()
+                            onOptionChanged(it)
+                        },
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Preview
+@Composable
+fun PickerPreview() {
+    Picker(
+        label = "Country",
+        options = setOf("Europe", "India", "Asia", "North America"),
+        onOptionChanged = {},
+    )
+}
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