From 594ea0520678fb0b45e7ada2939928a6bfb966b7 Mon Sep 17 00:00:00 2001
From: Raihan Ariq <202310715297@mhs.ubharajaya.ac.id>
Date: Sat, 13 Dec 2025 13:53:49 +0700
Subject: [PATCH] Migrasi Utilities

---
 .../com/example/notesai/util/Constants.kt     | 53 +++++++++++++++++++
 .../com/example/notesai/util/DateFormatter.kt | 42 +++++++++++++++
 .../com/example/notesai/util/Extensions.kt    | 27 ++++++++++
 3 files changed, 122 insertions(+)
 create mode 100644 app/src/main/java/com/example/notesai/util/Constants.kt
 create mode 100644 app/src/main/java/com/example/notesai/util/DateFormatter.kt
 create mode 100644 app/src/main/java/com/example/notesai/util/Extensions.kt

diff --git a/app/src/main/java/com/example/notesai/util/Constants.kt b/app/src/main/java/com/example/notesai/util/Constants.kt
new file mode 100644
index 0000000..4575ccb
--- /dev/null
+++ b/app/src/main/java/com/example/notesai/util/Constants.kt
@@ -0,0 +1,53 @@
+// File: util/Constants.kt
+package com.example.notesai.util
+
+import androidx.compose.ui.graphics.Color
+
+object Constants {
+    // App Info
+    const val APP_NAME = "AI Notes"
+    const val APP_VERSION = "1.0.0"
+
+    // DataStore
+    const val DATASTORE_NAME = "notes_prefs"
+    const val DEBOUNCE_DELAY = 500L
+
+    // UI Constants
+    const val MAX_NOTE_PREVIEW_LINES = 4
+    const val MAX_CHAT_PREVIEW_LINES = 2
+    const val GRID_COLUMNS = 2
+
+    // Gradients
+    val GRADIENT_PRESETS = listOf(
+        Pair(0xFF6366F1L, 0xFFA855F7L),
+        Pair(0xFFEC4899L, 0xFFF59E0BL),
+        Pair(0xFF8B5CF6L, 0xFFEC4899L),
+        Pair(0xFF06B6D4L, 0xFF3B82F6L),
+        Pair(0xFF10B981L, 0xFF059669L),
+        Pair(0xFFF59E0BL, 0xFFEF4444L),
+        Pair(0xFF6366F1L, 0xFF8B5CF6L),
+        Pair(0xFFEF4444L, 0xFFDC2626L)
+    )
+
+    // Colors
+    object AppColors {
+        val Primary = Color(0xFF6366F1)
+        val Secondary = Color(0xFFA855F7)
+        val Background = Color(0xFF0F172A)
+        val Surface = Color(0xFF1E293B)
+        val SurfaceVariant = Color(0xFF334155)
+        val OnBackground = Color(0xFFE2E8F0)
+        val OnSurface = Color(0xFFE2E8F0)
+        val Success = Color(0xFF10B981)
+        val Error = Color(0xFFEF4444)
+        val Warning = Color(0xFFFBBF24)
+        val TextSecondary = Color(0xFF94A3B8)
+        val TextTertiary = Color(0xFF64748B)
+        val Divider = Color(0xFF334155)
+    }
+
+    // Animation
+    const val ANIMATION_DURATION = 300
+    const val FADE_IN_DURATION = 200
+    const val FADE_OUT_DURATION = 200
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/notesai/util/DateFormatter.kt b/app/src/main/java/com/example/notesai/util/DateFormatter.kt
new file mode 100644
index 0000000..0bb545d
--- /dev/null
+++ b/app/src/main/java/com/example/notesai/util/DateFormatter.kt
@@ -0,0 +1,42 @@
+// File: util/DateFormatter.kt
+package com.example.notesai.util
+
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+object DateFormatter {
+    private val shortFormat = SimpleDateFormat("dd MMM, HH:mm", Locale("id", "ID"))
+    private val longFormat = SimpleDateFormat("dd MMMM yyyy, HH:mm", Locale("id", "ID"))
+    private val timeOnlyFormat = SimpleDateFormat("HH:mm", Locale("id", "ID"))
+    private val dateOnlyFormat = SimpleDateFormat("dd MMM yyyy", Locale("id", "ID"))
+
+    fun formatShort(timestamp: Long): String {
+        return shortFormat.format(Date(timestamp))
+    }
+
+    fun formatLong(timestamp: Long): String {
+        return longFormat.format(Date(timestamp))
+    }
+
+    fun formatTimeOnly(timestamp: Long): String {
+        return timeOnlyFormat.format(Date(timestamp))
+    }
+
+    fun formatDateOnly(timestamp: Long): String {
+        return dateOnlyFormat.format(Date(timestamp))
+    }
+
+    fun formatRelative(timestamp: Long): String {
+        val now = System.currentTimeMillis()
+        val diff = now - timestamp
+
+        return when {
+            diff < 60000 -> "Baru saja"
+            diff < 3600000 -> "${diff / 60000} menit yang lalu"
+            diff < 86400000 -> "${diff / 3600000} jam yang lalu"
+            diff < 604800000 -> "${diff / 86400000} hari yang lalu"
+            else -> formatDateOnly(timestamp)
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/notesai/util/Extensions.kt b/app/src/main/java/com/example/notesai/util/Extensions.kt
new file mode 100644
index 0000000..6c7f86b
--- /dev/null
+++ b/app/src/main/java/com/example/notesai/util/Extensions.kt
@@ -0,0 +1,27 @@
+// File: util/Extensions.kt
+package com.example.notesai.util
+
+import androidx.compose.ui.graphics.Color
+
+// String Extensions
+fun String.truncate(maxLength: Int, suffix: String = "..."): String {
+    return if (this.length > maxLength) {
+        this.substring(0, maxLength) + suffix
+    } else {
+        this
+    }
+}
+
+// Color Extensions
+fun Long.toColor(): Color = Color(this)
+
+fun Color.withAlpha(alpha: Float): Color = this.copy(alpha = alpha)
+
+// List Extensions
+fun <T> List<T>.replaceWhere(predicate: (T) -> Boolean, transform: (T) -> T): List<T> {
+    return this.map { if (predicate(it)) transform(it) else it }
+}
+
+fun <T> List<T>.removeWhere(predicate: (T) -> Boolean): List<T> {
+    return this.filter { !predicate(it) }
+}
\ No newline at end of file