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// Earth's radius in miles\n const dLat = (lat2 - lat1) * Math.PI / 180;\n const dLon = (lon2 - lon1) * Math.PI / 180;\n const a = \n Math.sin(dLat/2) * Math.sin(dLat/2) +\n Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * \n Math.sin(dLon/2) * Math.sin(dLon/2);\n const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));\n return R * c;\n}\n\n// Calculate travel time for given distance and transport mode\nfunction calculateTravelTime(distance: number, mode: TransportMode): number {\n const speeds = {\n walk: 3, // mph\n bike: 10, // mph\n public_transport: 15, // mph average\n car: 25 // mph in city\n };\n \n return Math.round((distance / speeds[mode]) * 60); // minutes\n}\n\n// Find the best transport mode for a given distance\nfunction getBestTransportMode(distance: number, availableModes: TransportMode[]): { mode: TransportMode, time: number } {\n let bestMode = availableModes[0];\n let bestTime = calculateTravelTime(distance, bestMode);\n\n for (const mode of availableModes) {\n const time = calculateTravelTime(distance, mode);\n if (time < bestTime) {\n bestMode = mode;\n bestTime = time;\n }\n }\n\n return { mode: bestMode, time: bestTime };\n}\n\n// Determine which social circle a user belongs to relative to the viewer\nfunction getSocialCircle(viewerId: string, ownerId: string, viewerSocialCircles: any): SocialCircle | null {\n if (viewerSocialCircles.oldPals.includes(ownerId)) return 'oldPals';\n if (viewerSocialCircles.friends.includes(ownerId)) return 'friends';\n if (viewerSocialCircles.newFriends.includes(ownerId)) return 'newFriends';\n return null;\n}\n\n// Check if viewer is in the target audience for an activity\nfunction isInTargetAudience(viewerId: string, activity: any, viewerSocialCircles: any): boolean {\n const ownerSocialCircle = getSocialCircle(viewerId, activity.ownerId, viewerSocialCircles);\n if (!ownerSocialCircle) return false;\n\n return activity.targetAudience.includes(ownerSocialCircle);\n}\n\n// Get available options for a user\ndiscovery.get(\"/:userId\", async (c) => {\n try {\n const userId = c.req.param(\"userId\");\n \n // Get viewer user data\n const viewer = await getUserById(userId);\n if (!viewer) {\n return c.json({\n success: false,\n error: \"User not found\"\n }, 404);\n }\n\n // Get all active activities\n const allActivities = await getActiveActivities();\n \n // Filter and process activities\n const options: ActivityOption[] = [];\n const now = new Date();\n\n for (const activity of allActivities) {\n // Skip own activities\n if (activity.ownerId === userId) continue;\n\n // Check if activity is still valid (for scheduled activities)\n if (activity.startTime) {\n const startTime = new Date(activity.startTime);\n if (startTime < now) continue; // Activity has already started\n }\n\n // Check if viewer is in target audience\n if (!isInTargetAudience(userId, activity, viewer.socialCircles)) continue;\n\n // Calculate distance\n const distance = calculateDistance(\n viewer.location.lat,\n viewer.location.lon,\n activity.location.lat,\n activity.location.lon\n );\n\n // Find best transport mode and calculate travel time\n const { mode, time } = getBestTransportMode(distance, viewer.transportModes);\n\n // Filter out activities that are too far or take too long\n if (time > 30) continue; // MAX_TRAVEL_TIME\n\n // Get owner information\n const owner = await getUserById(activity.ownerId);\n if (!owner) continue;\n\n // Determine social circle\n const socialCircle = getSocialCircle(userId, activity.ownerId, viewer.socialCircles);\n if (!socialCircle) continue;\n\n // Create activity option\n const option: ActivityOption = {\n ...activity,\n ownerName: owner.name,\n distance,\n travelTime: time,\n travelMode: mode,\n socialCircle\n };\n\n options.push(option);\n }\n\n // Sort activities by priority\n options.sort((a, b) => {\n // Primary: Distance (closer first)\n if (a.distance !== b.distance) {\n return a.distance - b.distance;\n }\n\n // Secondary: Social circle intimacy (oldPals > friends > newFriends)\n const circleOrder = { oldPals: 0, friends: 1, newFriends: 2 };\n if (a.socialCircle !== b.socialCircle) {\n return circleOrder[a.socialCircle] - circleOrder[b.socialCircle];\n }\n\n // Tertiary: Time (sooner activities first)\n if (a.startTime && b.startTime) {\n return new Date(a.startTime).getTime() - new Date(b.startTime).getTime();\n }\n\n // Open door activities (no startTime) come after scheduled ones\n if (a.startTime && !b.startTime) return -1;\n if (!a.startTime && b.startTime) return 1;\n\n return 0;\n });\n\n return c.json>({\n success: true,\n data: options\n });\n\n } catch (error) {\n console.error(\"Error getting available options:\", error);\n return c.json({\n success: false,\n error: \"Failed to get available options\"\n }, 500);\n }\n});\n\n// Get formatted options with natural language descriptions\ndiscovery.get(\"/:userId/formatted\", async (c) => {\n try {\n const userId = c.req.param(\"userId\");\n \n // Get viewer user data\n const viewer = await getUserById(userId);\n if (!viewer) {\n return c.json({\n success: false,\n error: \"User not found\"\n }, 404);\n }\n\n // Get all active activities\n const allActivities = await getActiveActivities();\n \n // Filter and process activities (same logic as main discovery endpoint)\n const options: ActivityOption[] = [];\n const now = new Date();\n\n for (const activity of allActivities) {\n // Skip own activities\n if (activity.ownerId === userId) continue;\n\n // Check if activity is still valid (for scheduled activities)\n if (activity.startTime) {\n const startTime = new Date(activity.startTime);\n if (startTime < now) continue; // Activity has already started\n }\n\n // Check if viewer is in target audience\n if (!isInTargetAudience(userId, activity, viewer.socialCircles)) continue;\n\n // Calculate distance\n const distance = calculateDistance(\n viewer.location.lat,\n viewer.location.lon,\n activity.location.lat,\n activity.location.lon\n );\n\n // Find best transport mode and calculate travel time\n const { mode, time } = getBestTransportMode(distance, viewer.transportModes);\n\n // Filter out activities that are too far or take too long\n if (time > 30) continue; // MAX_TRAVEL_TIME\n\n // Get owner information\n const owner = await getUserById(activity.ownerId);\n if (!owner) continue;\n\n // Determine social circle\n const socialCircle = getSocialCircle(userId, activity.ownerId, viewer.socialCircles);\n if (!socialCircle) continue;\n\n // Create activity option\n const option: ActivityOption = {\n ...activity,\n ownerName: owner.name,\n distance,\n travelTime: time,\n travelMode: mode,\n socialCircle\n };\n\n options.push(option);\n }\n\n // Sort activities by priority\n options.sort((a, b) => {\n // Primary: Distance (closer first)\n if (a.distance !== b.distance) {\n return a.distance - b.distance;\n }\n\n // Secondary: Social circle intimacy (oldPals > friends > newFriends)\n const circleOrder = { oldPals: 0, friends: 1, newFriends: 2 };\n if (a.socialCircle !== b.socialCircle) {\n return circleOrder[a.socialCircle] - circleOrder[b.socialCircle];\n }\n\n // Tertiary: Time (sooner activities first)\n if (a.startTime && b.startTime) {\n return new Date(a.startTime).getTime() - new Date(b.startTime).getTime();\n }\n\n // Open door activities (no startTime) come after scheduled ones\n if (a.startTime && !b.startTime) return -1;\n if (!a.startTime && b.startTime) return 1;\n\n return 0;\n });\n\n // Format each option with natural language\n const formattedOptions = options.map(option => {\n let description = \"\";\n let travelDescription = \"\";\n\n // Create travel description\n if (option.travelMode === 'walk') {\n travelDescription = `${option.travelTime} min walk`;\n } else if (option.travelMode === 'bike') {\n travelDescription = `${option.travelTime} min bike ride`;\n } else if (option.travelMode === 'public_transport') {\n travelDescription = `${option.travelTime} min via transit`;\n } else if (option.travelMode === 'car') {\n travelDescription = `${option.travelTime} min drive`;\n }\n\n // Create activity description based on type\n if (option.type === 'open_door') {\n description = `Go to ${option.ownerName}'s place`;\n if (option.endTime) {\n const endTime = new Date(option.endTime);\n const endTimeStr = endTime.toLocaleTimeString([], { hour: 'numeric', minute: '2-digit' });\n description += ` (open until ${endTimeStr})`;\n }\n } else if (option.type === 'public_outing' || option.type === 'private_outing') {\n description = option.title;\n if (option.startTime) {\n const startTime = new Date(option.startTime);\n const startTimeStr = startTime.toLocaleTimeString([], { hour: 'numeric', minute: '2-digit' });\n description += ` at ${startTimeStr}`;\n }\n if (option.ownerName) {\n description += ` with ${option.ownerName}`;\n }\n } else if (option.type === 'help_request') {\n description = `Help ${option.ownerName}: ${option.title}`;\n }\n\n return {\n ...option,\n formattedDescription: description,\n travelDescription,\n fullDescription: `${description} (${travelDescription})`\n };\n });\n\n return c.json>({\n success: true,\n data: formattedOptions\n });\n\n } catch (error) {\n console.error(\"Error getting formatted options:\", error);\n return c.json({\n success: false,\n error: \"Failed to get formatted options\"\n }, 500);\n }\n});\n\nexport default discovery;","deleted","label",[171,172,153],"backend","routes","permalink","https://www.val.town/x/jessicaocean/OUT-app/code/backend/routes/discovery.ts","extension","actionData","errors"]