mirror of
https://github.com/TwiN/gatus.git
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82 lines
3.1 KiB
Go
82 lines
3.1 KiB
Go
package memory
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import (
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"github.com/TwiN/gatus/v3/core"
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"github.com/TwiN/gatus/v3/storage/store/common"
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"github.com/TwiN/gatus/v3/storage/store/common/paging"
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)
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// ShallowCopyServiceStatus returns a shallow copy of a ServiceStatus with only the results
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// within the range defined by the page and pageSize parameters
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func ShallowCopyServiceStatus(ss *core.ServiceStatus, params *paging.ServiceStatusParams) *core.ServiceStatus {
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shallowCopy := &core.ServiceStatus{
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Name: ss.Name,
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Group: ss.Group,
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Key: ss.Key,
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Uptime: core.NewUptime(),
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}
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numberOfResults := len(ss.Results)
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resultsStart, resultsEnd := getStartAndEndIndex(numberOfResults, params.ResultsPage, params.ResultsPageSize)
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if resultsStart < 0 || resultsEnd < 0 {
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shallowCopy.Results = []*core.Result{}
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} else {
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shallowCopy.Results = ss.Results[resultsStart:resultsEnd]
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}
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numberOfEvents := len(ss.Events)
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eventsStart, eventsEnd := getStartAndEndIndex(numberOfEvents, params.EventsPage, params.EventsPageSize)
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if eventsStart < 0 || eventsEnd < 0 {
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shallowCopy.Events = []*core.Event{}
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} else {
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shallowCopy.Events = ss.Events[eventsStart:eventsEnd]
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}
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return shallowCopy
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}
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func getStartAndEndIndex(numberOfResults int, page, pageSize int) (int, int) {
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if page < 1 || pageSize < 0 {
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return -1, -1
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}
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start := numberOfResults - (page * pageSize)
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end := numberOfResults - ((page - 1) * pageSize)
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if start > numberOfResults {
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start = -1
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} else if start < 0 {
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start = 0
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}
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if end > numberOfResults {
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end = numberOfResults
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}
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return start, end
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}
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// AddResult adds a Result to ServiceStatus.Results and makes sure that there are
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// no more than MaximumNumberOfResults results in the Results slice
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func AddResult(ss *core.ServiceStatus, result *core.Result) {
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if ss == nil {
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return
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}
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if len(ss.Results) > 0 {
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// Check if there's any change since the last result
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if ss.Results[len(ss.Results)-1].Success != result.Success {
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ss.Events = append(ss.Events, core.NewEventFromResult(result))
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if len(ss.Events) > common.MaximumNumberOfEvents {
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// Doing ss.Events[1:] would usually be sufficient, but in the case where for some reason, the slice has
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// more than one extra element, we can get rid of all of them at once and thus returning the slice to a
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// length of MaximumNumberOfEvents by using ss.Events[len(ss.Events)-MaximumNumberOfEvents:] instead
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ss.Events = ss.Events[len(ss.Events)-common.MaximumNumberOfEvents:]
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}
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}
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} else {
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// This is the first result, so we need to add the first healthy/unhealthy event
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ss.Events = append(ss.Events, core.NewEventFromResult(result))
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}
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ss.Results = append(ss.Results, result)
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if len(ss.Results) > common.MaximumNumberOfResults {
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// Doing ss.Results[1:] would usually be sufficient, but in the case where for some reason, the slice has more
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// than one extra element, we can get rid of all of them at once and thus returning the slice to a length of
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// MaximumNumberOfResults by using ss.Results[len(ss.Results)-MaximumNumberOfResults:] instead
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ss.Results = ss.Results[len(ss.Results)-common.MaximumNumberOfResults:]
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}
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processUptimeAfterResult(ss.Uptime, result)
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}
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