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feat(mobileapp): percentage slider widgets for yield deposit/withdrawal #3

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feat(mobileapp): percentage slider widgets for yield deposit/withdrawal #3

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236 changes: 221 additions & 15 deletions mobileapp/app/yield-transaction.tsx
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
import React, { useState } from "react";
import React, { useState, useRef, useCallback } from "react";
import {
View,
Text,
Expand All @@ -8,6 +8,9 @@ import {
Modal,
KeyboardAvoidingView,
Platform,
PanResponder,
GestureResponderEvent,
PanResponderGestureState,
} from "react-native";
import { SafeAreaView } from "react-native-safe-area-context";
import { Ionicons } from "@expo/vector-icons";
Expand All @@ -33,6 +36,206 @@ const NAIRA_KEYPAD_KEYS = [
"⌫",
];

// ── Percentage Slider ─────────────────────────────────────────────────────────

const SNAP_PERCENTAGES = [0, 25, 50, 75, 100];

interface PercentageSliderProps {
/** Current selected percentage (0–100). */
value: number;
/** Called with the snapped percentage when the user slides or taps a tick. */
onChange: (pct: number) => void;
}

/**
* Horizontal slider that snaps to 0 / 25 / 50 / 75 / 100 %.
* Dragging the thumb or tapping a tick label both update the selection.
*/
function PercentageSlider({ value, onChange }: PercentageSliderProps) {
const trackWidth = useRef(0);

const snapToNearest = useCallback(
(rawPct: number) => {
const clamped = Math.max(0, Math.min(100, rawPct));
let closest = SNAP_PERCENTAGES[0];
let minDist = Math.abs(clamped - closest);
for (const snap of SNAP_PERCENTAGES) {
const dist = Math.abs(clamped - snap);
if (dist < minDist) {
minDist = dist;
closest = snap;
}
}
onChange(closest);
},
[onChange]
);

const panResponder = useRef(
PanResponder.create({
onStartShouldSetPanResponder: () => true,
onMoveShouldSetPanResponder: () => true,
onPanResponderGrant: (
evt: GestureResponderEvent,
_state: PanResponderGestureState
) => {
if (trackWidth.current === 0) return;
const x = evt.nativeEvent.locationX;
const rawPct = (x / trackWidth.current) * 100;
snapToNearest(rawPct);
},
onPanResponderMove: (
evt: GestureResponderEvent,
_state: PanResponderGestureState
) => {
if (trackWidth.current === 0) return;
const x = evt.nativeEvent.locationX;
const rawPct = (x / trackWidth.current) * 100;
snapToNearest(rawPct);
},
})
).current;

const thumbPosition = `${value}%` as `${number}%`;

return (
<View style={sliderStyles.wrapper}>
{/* Track */}
<View
style={sliderStyles.trackContainer}
onLayout={(e) => {
trackWidth.current = e.nativeEvent.layout.width;
}}
{...panResponder.panHandlers}
accessible={false}
>
{/* Filled portion */}
<View style={[sliderStyles.trackFill, { width: thumbPosition }]} />
{/* Tick marks */}
{SNAP_PERCENTAGES.map((pct) => (
<View
key={pct}
style={[
sliderStyles.tick,
{ left: `${pct}%` as `${number}%` },
pct === value && sliderStyles.tickActive,
]}
/>
))}
{/* Thumb */}
<View
style={[sliderStyles.thumb, { left: thumbPosition }]}
accessibilityRole="adjustable"
accessibilityValue={{ min: 0, max: 100, now: value }}
accessibilityLabel={`Percentage slider, ${value}%`}
/>
</View>

{/* Snap-point labels */}
<View style={sliderStyles.labelsRow}>
{SNAP_PERCENTAGES.filter((p) => p > 0).map((pct) => (
<TouchableOpacity
key={pct}
style={[
sliderStyles.labelBtn,
pct === value && sliderStyles.labelBtnActive,
]}
onPress={() => onChange(pct)}
activeOpacity={0.75}
accessibilityRole="button"
accessibilityLabel={`Set ${pct} percent`}
>
<Text
style={[
sliderStyles.labelText,
pct === value && sliderStyles.labelTextActive,
]}
>
{pct}%
</Text>
</TouchableOpacity>
))}
</View>
</View>
);
}

const sliderStyles = StyleSheet.create({
wrapper: {
marginBottom: 20,
},
trackContainer: {
height: 28,
backgroundColor: "#E8E8E8",
borderRadius: 14,
marginHorizontal: 8,
justifyContent: "center",
overflow: "visible",
position: "relative",
},
trackFill: {
position: "absolute",
left: 0,
top: 0,
bottom: 0,
backgroundColor: COLORS.primary,
borderRadius: 14,
},
tick: {
position: "absolute",
width: 2,
height: 10,
backgroundColor: "#CCCCCC",
borderRadius: 1,
top: 9,
marginLeft: -1,
},
tickActive: {
backgroundColor: COLORS.secondary,
},
thumb: {
position: "absolute",
width: 28,
height: 28,
borderRadius: 14,
backgroundColor: COLORS.white,
borderWidth: 2.5,
borderColor: COLORS.primary,
shadowColor: "#000",
shadowOffset: { width: 0, height: 2 },
shadowOpacity: 0.12,
shadowRadius: 4,
elevation: 3,
marginLeft: -14,
top: 0,
},
labelsRow: {
flexDirection: "row",
justifyContent: "space-around",
marginTop: 10,
marginHorizontal: 8,
},
labelBtn: {
paddingVertical: 6,
paddingHorizontal: 12,
borderRadius: 8,
backgroundColor: "#F0F0F0",
minWidth: 52,
alignItems: "center",
},
labelBtnActive: {
backgroundColor: COLORS.primary,
},
labelText: {
fontSize: 13,
fontFamily: "Outfit_600SemiBold",
color: COLORS.primary,
},
labelTextActive: {
color: COLORS.secondary,
},
});

// ── Naira Keypad ─────────────────────────────────────────────────────────────

function NairaKeypad({ onPress }: { onPress: (key: string) => void }) {
Expand Down Expand Up @@ -60,6 +263,7 @@ export default function YieldTransactionScreen() {
const [amount, setAmount] = useState("");
const [showConfirm, setShowConfirm] = useState(false);
const [submitted, setSubmitted] = useState(false);
const [sliderPct, setSliderPct] = useState(0);

// Simulated balances — replace with API/store values in production
const availableBalance = 150_000;
Expand All @@ -74,6 +278,8 @@ export default function YieldTransactionScreen() {
const isValid = numericAmount > 0 && !exceedsLimit;

function handleKeyPress(key: string) {
// Manual keypad entry clears the slider selection
setSliderPct(0);
if (key === "⌫") {
setAmount((prev) => prev.slice(0, -1));
return;
Expand Down Expand Up @@ -162,6 +368,7 @@ export default function YieldTransactionScreen() {
onPress={() => {
setMode("deposit");
setAmount("");
setSliderPct(0);
}}
>
<Ionicons
Expand All @@ -187,6 +394,7 @@ export default function YieldTransactionScreen() {
onPress={() => {
setMode("withdraw");
setAmount("");
setSliderPct(0);
}}
>
<Ionicons
Expand Down Expand Up @@ -242,20 +450,18 @@ export default function YieldTransactionScreen() {
</Text>
)}

{/* Quick-fill buttons */}
<View style={styles.quickFillRow}>
{[25, 50, 75, 100].map((pct) => (
<TouchableOpacity
key={pct}
style={styles.quickFillBtn}
onPress={() =>
setAmount(((activeBalance * pct) / 100).toFixed(2))
}
>
<Text style={styles.quickFillText}>{pct}%</Text>
</TouchableOpacity>
))}
</View>
{/* Percentage slider */}
<PercentageSlider
value={sliderPct}
onChange={(pct) => {
setSliderPct(pct);
if (pct === 0) {
setAmount("");
} else {
setAmount(((activeBalance * pct) / 100).toFixed(2));
}
}}
/>

{/* Naira keypad */}
<NairaKeypad onPress={handleKeyPress} />
Expand Down
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