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Escript to Graph a Riak Ring using HTML5 and Graph.JS
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| #!/usr/bin/env escript | |
| %% -*- erlang -*- | |
| %%! -smp enable -sname graph_ring -mnesia debug verbose | |
| main([RingFile, OutFile]) -> | |
| {ok, Binary} = file:read_file(RingFile), | |
| Ring = binary_to_term(Binary), | |
| OwnerList = element(2,element(4,Ring)), | |
| %io:format("~s~n", [lists:flatten(header(body(footer([]),OwnerList)))]); | |
| OutString = lists:flatten(header(body(footer([]),OwnerList))), | |
| try | |
| file:write_file(OutFile, io_lib:format("~s~n", [OutString])), | |
| io:format("Saved ~p to ~p.~n", [RingFile, OutFile]) | |
| catch | |
| A:B -> | |
| io:format("Exception ~p:~p~n",[A,B]) | |
| end; | |
| main([RingFile]) -> | |
| main([RingFile, lists:append(RingFile,".html")]); | |
| main(_) -> | |
| usage(). | |
| usage() -> | |
| io:format("usage: graph_ring RingFile [OutputFile]\n"), | |
| halt(1). | |
| header(IOList) -> | |
| Header = " | |
| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset=utf-8 /> | |
| <title>Ring Graph</title> | |
| <script type=\"text/javascript\" src=\"https://raw.githubusercontent.com/nnnick/Chart.js/master/Chart.min.js\"></script> | |
| </head> | |
| <body>", | |
| Chart = "<canvas style=\"float:left\" id=\"myChart\" width=\"800\" height=\"800\"></canvas>", | |
| [Header, Chart,IOList]. | |
| body(IOList,OwnerList) -> | |
| BodyBegin = " | |
| <script> | |
| ", | |
| BodyEnd = " | |
| var ctx = document.getElementById(\"myChart\").getContext(\"2d\"); | |
| var myNewChart = new Chart(ctx).Doughnut(data,options); | |
| new Chart(ctx).Doughnut(data,options); | |
| </script>", | |
| [BodyBegin, data(OwnerList), options(), BodyEnd, legend(OwnerList), IOList]. | |
| footer(IOList) -> | |
| Footer = " | |
| </body> | |
| </html> | |
| ", | |
| [Footer,IOList]. | |
| data(OwnerList) -> | |
| % {Modulo,_} = lists:nth(2,OwnerList), | |
| DataList = lists:map( | |
| fun({_Partition,Node}) -> | |
| <<R:8, G:8, B:8, _/binary>> = erlang:md5(atom_to_list(Node)), | |
| ["{value:",integer_to_list(1),",color:\"rgb(",integer_to_list(R),",",integer_to_list(G),",",integer_to_list(B),")\"},\n"] | |
| end, OwnerList), | |
| ["var data = [",DataList,"];\n"]. | |
| options() -> | |
| [" | |
| var options = { | |
| segmentShowStroke : true, | |
| segmentStrokeWidth : 1, | |
| percentageInnerCutout : 95, | |
| animation : false } | |
| "]. | |
| legend(OwnerList) -> | |
| ["<table style=\"float:right\">",legendRows(OwnerList),"</table>"]. | |
| legendRows(OwnerList) -> | |
| NodeList=lists:usort(element(2,lists:unzip(OwnerList))), | |
| NodeHtml = lists:map( | |
| fun(Node) -> | |
| <<R:8, G:8, B:8, _/binary>> = erlang:md5(atom_to_list(Node)), | |
| ["<tr><td style=\"font-family: Helvetica, Arial, sans; font-size: .8em; height: 2.5em; color:",textColor([R,G,B]),"; background-color:rgb(",integer_to_list(R),",",integer_to_list(G),",",integer_to_list(B),")\">",atom_to_list(Node),"</tr>"] | |
| end, NodeList), | |
| NodeHtml. | |
| textColor(Colors) -> | |
| case (lists:max(Colors) + lists:min(Colors)) / 2.0 < 128 of | |
| true -> | |
| "white"; | |
| _ -> | |
| "black" | |
| end. | |
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