Creating A Cross-Platform Leaderboard

Max_Niebylski · May 31, 2014, 8:02pm

Thanks. I got it work to the point where every time I use my function, I save the json data to a file. I’m having trouble loading the scores and then setting them equal to variables.

toga · May 31, 2014, 8:43pm

try something like that.

local path = system.pathForFile( “score”… “.json”, system.DocumentsDirectory )

local file = io.open( path, “r” )

if not file then

return

end

globalScores = json.decode( file:read( “*a” ) )

io.close( file )

Max_Niebylski · May 31, 2014, 9:38pm

Yup. I now have a json file created but there is a problem with the json’s format. It is quite strange. All of the data is in a sub-sub-sub family. Also the names and scores are in a seemingly unaccessable family. I want to take the first 100 names and scores and make a list of them. Still having some trouble.

Edit: here is the json file

{"dreamlo":{"leaderboard":{"entry":[{"name":"SummitTech","score":"55"},{"name":"Brengor","score":"43"},{"name":"DrClueless","score":"39"},{"name":"Duplon","score":"31"},{"name":"Skygoma","score":"23"}]}}}

rob · May 31, 2014, 10:23pm

If it helps, you can put some newlines in there to help you understand the structure a bit better:

{"dreamlo": &nbsp;&nbsp;&nbsp; {"leaderboard": &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"entry":[&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"SummitTech","score":"55"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"Brengor","score":"43"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"DrClueless","score":"39"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"Duplon","score":"31"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"Skygoma","score":"23"}] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } &nbsp;&nbsp;&nbsp; } }

When this gets json.decode()'ed into a Lua table you have (lets call the table “t”:

t.dreamlo.leaderboard.entry[1].name

t.dreamlo.leaderboard.entry[1].score

t.dreamlo.leaderboard.entry[2].name

t.dreamlo.leaderboard.entry[2].score

t.dreamlo.leaderboard.entry[3].name

t.dreamlo.leaderboard.entry[3].score

etc.

Here is a little sample to show you:

local json = require("json") local t = json.decode([[{"dreamlo": &nbsp;&nbsp;&nbsp; {"leaderboard": &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"entry":[&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"SummitTech","score":"55"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"Brengor","score":"43"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"DrClueless","score":"39"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"Duplon","score":"31"}, &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {"name":"Skygoma","score":"23"}] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } &nbsp;&nbsp;&nbsp; } } ]] ) print(t.dreamlo.leaderboard.entry[1].name) print(t.dreamlo.leaderboard.entry[1].score) print(t.dreamlo.leaderboard.entry[2].name) print(t.dreamlo.leaderboard.entry[2].score) print(t.dreamlo.leaderboard.entry[3].name) print(t.dreamlo.leaderboard.entry[3].score)

Rob

Max_Niebylski · May 31, 2014, 10:29pm

Thank you so much Rob! You have no idea how helpful your post was! I will try messing with my code in a bit. I’ll let everyone know if things workout.

Thanks again

erockower · August 8, 2014, 6:38am

I already have a number of AWS servers running Ubuntu, with PHP, MySQL, MongoDB, and some with nodejs. Are there instructions on how I can install coronium on an existing EC2 instance?

erockower · August 8, 2014, 6:38am

I already have a number of AWS servers running Ubuntu, with PHP, MySQL, MongoDB, and some with nodejs. Are there instructions on how I can install coronium on an existing EC2 instance?