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-module(mongoose_system_metrics_sender). |
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-define(BASE_URL, "https://www.google-analytics.com/batch"). |
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-export([send/3]). |
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-type google_analytics_report() :: string(). |
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-type url() :: string(). |
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-type report_struct() :: mongoose_system_metrics_collector:report_struct(). |
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-spec send(service_mongoose_system_metrics:client_id(), |
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[report_struct()], |
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[service_mongoose_system_metrics:tracking_id()]) -> ok. |
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send(ClientId, ReportStructs, TrackingIds) -> |
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Reports = build_reports_for_each_tracking_id(ClientId, TrackingIds, ReportStructs), |
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send_reports(Reports), |
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ok. |
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-spec build_reports_for_each_tracking_id(service_mongoose_system_metrics:client_id(), |
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[service_mongoose_system_metrics:tracking_id()], |
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[report_struct()]) -> [google_analytics_report()]. |
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build_reports_for_each_tracking_id(ClientId, TrackingIds, ReportStructs) -> |
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lists:map( |
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fun(Tid) -> |
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build_reports(ClientId, Tid, ReportStructs) |
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end, TrackingIds). |
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-spec build_reports(service_mongoose_system_metrics:client_id(), |
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service_mongoose_system_metrics:tracking_id(), |
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[report_struct()]) -> [google_analytics_report()]. |
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build_reports(ClientId, TrackingId, ReportStructs) -> |
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lists:map( |
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fun(Report) -> |
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3887 |
build_report(ClientId, TrackingId, Report) |
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end, ReportStructs). |
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send_reports(ReportsList) -> |
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Url = get_url(), |
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lists:map( |
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fun(Reports) -> |
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flush_reports(Url, Reports) |
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end, ReportsList). |
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get_url() -> |
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mongoose_config:get_opt(google_analytics_url, ?BASE_URL). |
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% % https://developers.google.com/analytics/devguides/collection/protocol/v1/devguide#batch-limitations |
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% % A maximum of 20 hits can be specified per request. |
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-spec flush_reports(url(), [google_analytics_report()]) -> {ok, term()} | {error, term()}. |
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flush_reports(_, []) -> |
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:-( |
{ok, nothing_to_do}; |
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flush_reports(ReportUrl, Lines) when length(Lines) =< 20 -> |
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Headers = [], |
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ContentType = "", |
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Body = string:join(Lines, "\n"), |
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Request = {ReportUrl, Headers, ContentType, Body}, |
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httpc:request(post, Request, [], []); |
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flush_reports(ReportUrl, Lines) -> |
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{NewBatch, RemainingLines} = lists:split(20, Lines), |
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flush_reports(ReportUrl, NewBatch), |
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flush_reports(ReportUrl, RemainingLines). |
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build_report(ClientId, TrackingId, #{report_name := EventCategory, key := EventAction, value := EventLabel}) -> |
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LstClientId = term_to_string(ClientId), |
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LstEventCategory = term_to_string(EventCategory), |
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LstEventAction = term_to_string(EventAction), |
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LstEventLabel = term_to_string(EventLabel), |
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LstLine = [ |
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"v=1", |
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"&tid=", TrackingId, |
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"&t=event", |
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"&cid=", LstClientId, |
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"&ec=", LstEventCategory, |
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"&ea=", LstEventAction, |
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"&el=", LstEventLabel], |
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string:join(LstLine, ""). |
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term_to_string(Term) when is_binary(Term) -> |
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term_to_string(binary_to_list(Term)); |
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term_to_string(Term) -> |
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15548 |
R = io_lib:format("~p",[Term]), |
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lists:flatten(R). |