WhereYouAre
I'm going to take an "Open-Design Software" approach to this project, please feel free to send me your two cents if you have an opinion.
Analysis
It would be useful, and should be easy, to provide an app that shows where your friends are. Many of these apps already exist, but they all break down when it comes to reaching critical mass: it's just too much trouble to get all your friends registered and receive their locations when you need them. Everyone is not going to run the app at the same time, which just leaves push communication to the phone. Can we solve this problem well enough to make an app worth having?
Requirements
- Free and easy to configure
- Quickly start to track existing friends
- Provide tracking for all, one, and groups of friends
- Make fast privacy and priority adjustments
- Obtain best-in-class location information
Design
- Map view for traditional location display
- Arrow view for sexy fun location display
- Contacts view for fast privacy/prioritization changes
Implementation
map features:
get updated locations
touch user to open details
arrow features:
get updated locations
touch user to open details
contacts features:
add friend
remove friend
import friends?
open details...
show pic, phone, ip, last timestamp
adjust...
track follow just this user
meetup track, + use push to harass, etc. for meetup
ignore do not show this user no matter what
stealth show this user but prevent them from seeing me
ping/msg send a push to the wya user
groups change friend's groups
settings features:
go completely offline
go completely stealth
select current group
manage groups including priority
adjust total number of friends shown on arrows
adjust total number of friends shown on map
toggle [show my location] on map
turn off focus (if on)
turn off meetup (if on)
wya PHASE 1 NOTES -----------------
wya API requirements ------------------------------------------ https - put - wya/user/123-456-7890/password (need to verify against new app "orders"?! for now, allow new#'s to register?!) https w basic auth - put - wya/user/123-456-7890/password (only to change existing users' pwd) https w basic auth - put - wya/user/123-456-7890/location https w basic auth - put - wya/user/123-456-7890/subscription https w basic auth - get - wya/user/123-456-7890/subscription/location_and_age_array
wya PHASE 2 NOTES ----------------- https put "my friends subscription" (on startup) https put "my location" every 15 seconds (may be "stealthmode") \ https get "my friends' locations" with ages (may be "stealthed")/ combine? https post "my new friend" with phone number and stealthstatus https put "my friend" with phone number and updated stealthstatus https delete "my friend" with phone number https put "ping this friend" with phone number https put "logoff"
NOT needed...
-------------
put "i am running the app" (implied by [put my location])
put "my friend" (the server only tracks phone number, no editing available)
any meetup or ignore state
ignore is done by deleting friend
meetup is done by client requesting pings
wya server requirements
-------------------
track activeuser {phone,stealthmode,friendarray{phone,stealthed}} array
collect nonstealthed friend locations "by any means necessary"
priority: active app users, inactive app users, nonusers
reply to API requests
only report locations if not stealthed
only report locations if under a day old?
ping app users for meetups (if not ignored or stealthmoded)
use TTL of 6 heartbeats, kill activeuser after that
wya client requirements ------------------- maintain complete friends list (even ignored) with prioritization ping server with location every 15 seconds adjust tracking to include "top n" friends "ignore all" mode (similar to "logoff server")
(round1)
all f's of all users running app need constant location ping
f's must be shared with phone# as key
server must track users' flist
server must constantly work on getting f updates
user starts up app
user logs in to server and sends friendlist
server adds user to userlist, merges friendlist into totalfriendlist (w/refcount?)
server should do its best to get all friends' locations
** this is a separate task from communicating with user **
user pings server with location, gets f updates
ping every 15 seconds?
only send updates if they have not been received by user? (how to get best performance?)
user shuts down app (or times out)
user is logged out of server
server f location collector
use external services to poll for location for all f that are not running app
ping every 15 seconds?
users that are running app are all sending locations, no need to collect them
include occasional push check:
if f owns app
if f is not running app
if f is in meetup
push request to f1
<iph> <tdm_rest> <tdm_pusher> <apl> <loc_server> ----- ----- ----- ----- -----
REST Examples
- The best example I have to follow is the Twitter API. It *obviously* scales. It uses Basic Authentication, which sucks (everything is plaintext, holy shit). BETTER force it to use SSL. They are moving towards a more-robust authentication based on OAuth.
- The other excellent example is the Amazon S3 API. Authentication is brilliant - it uses a SHA1 signature of the request, which MUST include a timestamp within the last 15 minutes. There is a set of rules for turning the request URL into the request string that is signed.
Signature = Base64( HMAC-SHA1( UTF-8-Encoding-Of( YourSecretAccessKeyID, StringToSign ) ) );