mirror of
https://github.com/TwiN/gatus.git
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93 lines
2.9 KiB
Go
93 lines
2.9 KiB
Go
package slack
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import (
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"bytes"
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"fmt"
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"io"
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"net/http"
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"github.com/TwiN/gatus/v3/alerting/alert"
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"github.com/TwiN/gatus/v3/client"
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"github.com/TwiN/gatus/v3/core"
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)
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// AlertProvider is the configuration necessary for sending an alert using Slack
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type AlertProvider struct {
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WebhookURL string `yaml:"webhook-url"` // Slack webhook URL
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// DefaultAlert is the default alert configuration to use for endpoints with an alert of the appropriate type
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DefaultAlert *alert.Alert `yaml:"default-alert"`
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}
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// IsValid returns whether the provider's configuration is valid
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func (provider *AlertProvider) IsValid() bool {
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return len(provider.WebhookURL) > 0
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}
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// Send an alert using the provider
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func (provider *AlertProvider) Send(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) error {
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buffer := bytes.NewBuffer([]byte(provider.buildRequestBody(endpoint, alert, result, resolved)))
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request, err := http.NewRequest(http.MethodPost, provider.WebhookURL, buffer)
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if err != nil {
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return err
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}
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request.Header.Set("Content-Type", "application/json")
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response, err := client.GetHTTPClient(nil).Do(request)
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if err != nil {
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return err
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}
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if response.StatusCode > 399 {
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body, _ := io.ReadAll(response.Body)
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return fmt.Errorf("call to provider alert returned status code %d: %s", response.StatusCode, string(body))
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}
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return err
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}
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// buildRequestBody builds the request body for the provider
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func (provider *AlertProvider) buildRequestBody(endpoint *core.Endpoint, alert *alert.Alert, result *core.Result, resolved bool) string {
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var message, color, results string
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if resolved {
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message = fmt.Sprintf("An alert for *%s* has been resolved after passing successfully %d time(s) in a row", endpoint.DisplayName(), alert.SuccessThreshold)
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color = "#36A64F"
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} else {
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message = fmt.Sprintf("An alert for *%s* has been triggered due to having failed %d time(s) in a row", endpoint.DisplayName(), alert.FailureThreshold)
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color = "#DD0000"
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}
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for _, conditionResult := range result.ConditionResults {
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var prefix string
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if conditionResult.Success {
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prefix = ":white_check_mark:"
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} else {
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prefix = ":x:"
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}
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results += fmt.Sprintf("%s - `%s`\\n", prefix, conditionResult.Condition)
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}
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var description string
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if alertDescription := alert.GetDescription(); len(alertDescription) > 0 {
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description = ":\\n> " + alertDescription
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}
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return fmt.Sprintf(`{
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"text": "",
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"attachments": [
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{
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"title": ":helmet_with_white_cross: Gatus",
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"text": "%s%s",
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"short": false,
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"color": "%s",
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"fields": [
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{
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"title": "Condition results",
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"value": "%s",
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"short": false
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}
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]
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}
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]
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}`, message, description, color, results)
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}
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// GetDefaultAlert returns the provider's default alert configuration
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func (provider AlertProvider) GetDefaultAlert() *alert.Alert {
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return provider.DefaultAlert
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}
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