Live position tracking on ride

[kachnitel]

+2 !

• A new Tracking screen where user can toggle tracking on current ride
• Screen has a live map of members
  • Must show trails in map
• Delete server data when user stops tracking (use session id for "track")
• Confirm event by current time and user's events or create a new one automatically at nearest location if not found / initiated by user
• Show general visible entities if not on a ride (friends & emergency)
• Notify user that it shares location with members of said event
• Invite button
• Show notification when emergency is on

Implementation

Options:

API

• Push own location & visibility to API
  • POST /tracking {visibility, location, timestamp}
  • visibility: friends|event:id|public
• Retrieve periodically with the screen open
  • GET /tracking
  • returns all latest visible locations for current user
  • all event members if active (regardless of distance)
    • show arrow if off screen
  • all visible within radius (5km / slider?)

---

• Push updates to API every X sec

  • store in table: userId, location, timestamp, audience where audience is event id / friends / public / emergency?
  • use a queue in local store, send to API as a list. Add failed requests back to list
  • cap at recent n entries (last ? minutes)

• Retrieve when tracking screen is open and refresh regularly while it is or when it comes to focus

  • Refresh with longer delay on bg (5/30s?)
  • Fetching from API retrieves all ride members/friends/emergency
  • Show location as stale if older than 5m
  • Only show location newer than 1hr
  • Show ride members' last N locations

UI

Screen shows a map and toggles:

• Tracking on/off
• Event select
  • If selected, map shows event members and updates are visible to members
  • IF none selected, Map shows friends and updates visible to friends

Show button to display emergency info (GPS)

• Toggle to set own location as "emergency" marker
  • Set visibility to members/friends/anyone (remember setting)
  • Notify members / friends nearby / anyone nearby
• Display emergency phone number if in bike park
  • Search locations within 5km with a phone number (not available at TF)

Badged button with list of tracked users

• Tapping user in list centers map on him

Map markers can be a small ProfilePicture

• [x] Random color for each user
• [x] Draw track of past locations
  • [ ] since X time ago
• Callout shows name, time since last update
• [ ] Show (small) directional arrow for off-screen entities (ride only?)

  ExpoLocation.Accuracy

  declare enum LocationAccuracy {
  Lowest = 1,
  Low = 2,
  Balanced = 3,
  High = 4,
  Highest = 5,
  BestForNavigation = 6
  }
  declare enum LocationActivityType {
  Other = 1,
  AutomotiveNavigation = 2,
  **Fitness = 3,**
  OtherNavigation = 4,
  Airborne = 5
  }

[kachnitel]

Huawei may need some background task tweaking