mirror of
https://github.com/dz0ny/meshcore-sar.git
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feat: MeshCore SAR - Flutter BLE mesh radio companion app
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Janez T
302
lib/models/sar_template.dart
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302
lib/models/sar_template.dart
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import 'package:flutter/material.dart';
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import '../l10n/app_localizations.dart';
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/// SAR Template - Customizable template for SAR (Cursor on Target) messages
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class SarTemplate {
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final String id;
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final String emoji;
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final String name;
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final String description;
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final String colorHex;
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final bool isDefault;
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/// Standard color palette for SAR markers (index 0-7)
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/// This palette is used for transmission to ensure consistent colors across devices
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static const List<String> colorPalette = [
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'#F44336', // 0 - Red
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'#2196F3', // 1 - Blue
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'#4CAF50', // 2 - Green
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'#FFC107', // 3 - Yellow
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'#FF9800', // 4 - Orange
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'#9C27B0', // 5 - Purple
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'#E91E63', // 6 - Pink
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'#00BCD4', // 7 - Cyan
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];
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SarTemplate({
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required this.id,
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required this.emoji,
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required this.name,
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required this.description,
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required this.colorHex,
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this.isDefault = false,
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});
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/// Get color from hex string
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Color get color {
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final hexCode = colorHex.replaceAll('#', '');
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return Color(int.parse('FF$hexCode', radix: 16));
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}
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/// Get localized display name for this template
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/// Returns localized name for default templates, or the stored name for custom templates
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String getLocalizedName(BuildContext context) {
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final l10n = AppLocalizations.of(context);
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if (l10n == null) return name;
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// Return localized names for default templates
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switch (id) {
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case 'default_found_person':
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return l10n.sarMarkerFoundPerson;
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case 'default_fire':
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return l10n.sarMarkerFire;
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case 'default_staging_area':
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return l10n.sarMarkerStagingArea;
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case 'default_object':
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return l10n.sarMarkerObject;
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default:
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// For custom templates, return the stored name
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return name;
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}
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}
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/// Get the closest color index from the standard palette
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/// Returns 0-7 for standard colors, or the closest match
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int getColorIndex() {
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// Normalize both colors to uppercase for comparison
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final normalizedColorHex = colorHex.toUpperCase();
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// Check for exact match first
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for (int i = 0; i < colorPalette.length; i++) {
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if (colorPalette[i].toUpperCase() == normalizedColorHex) {
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return i;
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}
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}
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// If no exact match, find closest color by calculating distance
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// Parse RGB values
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final hexCode = colorHex.replaceAll('#', '');
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final r = int.parse(hexCode.substring(0, 2), radix: 16);
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final g = int.parse(hexCode.substring(2, 4), radix: 16);
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final b = int.parse(hexCode.substring(4, 6), radix: 16);
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int closestIndex = 0;
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double minDistance = double.infinity;
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for (int i = 0; i < colorPalette.length; i++) {
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final paletteHex = colorPalette[i].replaceAll('#', '');
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final pr = int.parse(paletteHex.substring(0, 2), radix: 16);
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final pg = int.parse(paletteHex.substring(2, 4), radix: 16);
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final pb = int.parse(paletteHex.substring(4, 6), radix: 16);
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// Calculate Euclidean distance in RGB space
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final distance = ((r - pr) * (r - pr) + (g - pg) * (g - pg) + (b - pb) * (b - pb)).toDouble();
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if (distance < minDistance) {
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minDistance = distance;
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closestIndex = i;
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}
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}
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return closestIndex;
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}
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/// Get color hex from palette index
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static String getColorFromIndex(int index) {
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if (index < 0 || index >= colorPalette.length) {
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return '#9E9E9E'; // Gray for invalid index
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}
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return colorPalette[index];
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}
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/// Create from JSON
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factory SarTemplate.fromJson(Map<String, dynamic> json) {
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return SarTemplate(
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id: json['id'] as String,
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emoji: json['emoji'] as String,
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name: json['name'] as String,
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description: json['description'] as String? ?? '',
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colorHex: json['colorHex'] as String,
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isDefault: json['isDefault'] as bool? ?? false,
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);
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}
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/// Convert to JSON
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Map<String, dynamic> toJson() {
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return {
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'id': id,
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'emoji': emoji,
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'name': name,
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'description': description,
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'colorHex': colorHex,
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'isDefault': isDefault,
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};
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}
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/// Create from SAR message format (S:emoji:0,0:description)
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/// Example: S:🧑:0,0:Person found
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factory SarTemplate.fromSarMessage(String message) {
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final trimmed = message.trim();
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if (!trimmed.startsWith('S:')) {
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throw FormatException('SAR message must start with "S:"');
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}
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// Parse format: S:emoji:lat,lon:description
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final parts = trimmed.split(':');
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if (parts.length < 3) {
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throw FormatException('Invalid SAR message format');
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}
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final emoji = parts[1].trim();
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if (emoji.isEmpty) {
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throw FormatException('Emoji cannot be empty');
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}
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// Extract description (everything after the third colon)
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String description = '';
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if (parts.length > 3) {
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description = parts.sublist(3).join(':').trim();
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}
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// Generate ID from emoji + description
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final id = '${emoji}_${DateTime.now().millisecondsSinceEpoch}';
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// Auto-assign color based on emoji
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String colorHex = _getColorForEmoji(emoji);
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return SarTemplate(
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id: id,
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emoji: emoji,
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name: description.isNotEmpty ? description : emoji,
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description: description,
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colorHex: colorHex,
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isDefault: false,
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);
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}
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/// Convert to SAR message format with placeholder coordinates
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/// New format: S:emoji:colorIndex:0,0:description
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/// Example: S:🧑:2:0,0:Person found (2 = Green)
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String toSarMessage() {
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final colorIndex = getColorIndex();
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if (description.isNotEmpty) {
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return 'S:$emoji:$colorIndex:0,0:$description';
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}
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return 'S:$emoji:$colorIndex:0,0';
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}
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/// Auto-assign color based on emoji (uses standard color palette)
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static String _getColorForEmoji(String emoji) {
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// Default emoji to color mapping using standard palette
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final colorMap = {
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// Green (index 2) - Person, Safe, Nature
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'🧑': colorPalette[2],
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'👤': colorPalette[2],
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'✅': colorPalette[2],
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'🌲': colorPalette[2],
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// Red (index 0) - Fire, Hazard, Medical, Emergency
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'🔥': colorPalette[0],
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'🚒': colorPalette[0],
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'🚑': colorPalette[0],
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'❌': colorPalette[0],
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'🏥': colorPalette[0],
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// Orange (index 4) - Staging, Assembly
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'🏕️': colorPalette[4],
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'⛺': colorPalette[4],
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// Purple (index 5) - Objects
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'📦': colorPalette[5],
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// Blue (index 1) - Water, Air support
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'🚁': colorPalette[1],
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'💧': colorPalette[1],
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// Yellow (index 3) - Warning, Caution
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'⚠️': colorPalette[3],
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};
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return colorMap[emoji] ?? '#9E9E9E'; // Default gray for unknown emojis
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}
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/// Copy with modifications
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SarTemplate copyWith({
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String? id,
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String? emoji,
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String? name,
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String? description,
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String? colorHex,
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bool? isDefault,
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}) {
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return SarTemplate(
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id: id ?? this.id,
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emoji: emoji ?? this.emoji,
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name: name ?? this.name,
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description: description ?? this.description,
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colorHex: colorHex ?? this.colorHex,
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isDefault: isDefault ?? this.isDefault,
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);
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}
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@override
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String toString() {
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return 'SarTemplate(id: $id, emoji: $emoji, name: $name, description: $description)';
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}
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@override
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bool operator ==(Object other) {
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if (identical(this, other)) return true;
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return other is SarTemplate && id == other.id;
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}
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@override
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int get hashCode => id.hashCode;
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/// Default templates (uses standard color palette)
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/// Colors reference:
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/// - 0 Red (#F44336) - Fire, Hazard, Medical
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/// - 1 Blue (#2196F3) - Water, Helicopter
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/// - 2 Green (#4CAF50) - Found Person, Safe
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/// - 3 Yellow (#FFC107) - Warning
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/// - 4 Orange (#FF9800) - Staging Area
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/// - 5 Purple (#9C27B0) - Object
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/// - 6 Pink (#E91E63) - Reserved
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/// - 7 Cyan (#00BCD4) - Reserved
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static List<SarTemplate> get defaults {
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return [
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SarTemplate(
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id: 'default_found_person',
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emoji: '🧑',
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name: 'Found Person',
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description: '',
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colorHex: colorPalette[2], // Green
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isDefault: true,
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),
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SarTemplate(
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id: 'default_fire',
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emoji: '🔥',
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name: 'Fire',
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description: '',
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colorHex: colorPalette[0], // Red
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isDefault: true,
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),
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SarTemplate(
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id: 'default_staging_area',
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emoji: '🏕️',
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name: 'Staging Area',
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description: '',
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colorHex: colorPalette[4], // Orange
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isDefault: true,
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),
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SarTemplate(
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id: 'default_object',
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emoji: '📦',
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name: 'Object',
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description: '',
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colorHex: colorPalette[5], // Purple
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isDefault: true,
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),
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];
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}
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}
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