123 lines
3.9 KiB
Go
123 lines
3.9 KiB
Go
package discord
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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/v4/alerting/alert"
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"github.com/TwiN/gatus/v4/client"
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"github.com/TwiN/gatus/v4/core"
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)
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// AlertProvider is the configuration necessary for sending an alert using Discord
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type AlertProvider struct {
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WebhookURL string `yaml:"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,omitempty"`
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// Overrides is a list of Override that may be prioritized over the default configuration
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Overrides []Override `yaml:"overrides,omitempty"`
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}
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// Override is a case under which the default integration is overridden
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type Override struct {
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Group string `yaml:"group"`
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WebhookURL string `yaml:"webhook-url"`
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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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registeredGroups := make(map[string]bool)
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if provider.Overrides != nil {
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for _, override := range provider.Overrides {
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if isAlreadyRegistered := registeredGroups[override.Group]; isAlreadyRegistered || override.Group == "" || len(override.WebhookURL) == 0 {
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return false
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}
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registeredGroups[override.Group] = true
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}
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}
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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.getWebhookURLForGroup(endpoint.Group), 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, results string
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var colorCode int
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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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colorCode = 3066993
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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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colorCode = 15158332
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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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"content": "",
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"embeds": [
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{
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"title": ":helmet_with_white_cross: Gatus",
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"description": "%s%s",
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"color": %d,
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"fields": [
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{
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"name": "Condition results",
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"value": "%s",
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"inline": false
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}
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]
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}
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]
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}`, message, description, colorCode, results)
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}
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// getWebhookURLForGroup returns the appropriate Webhook URL integration to for a given group
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func (provider *AlertProvider) getWebhookURLForGroup(group string) string {
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if provider.Overrides != nil {
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for _, override := range provider.Overrides {
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if group == override.Group {
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return override.WebhookURL
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}
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}
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}
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return provider.WebhookURL
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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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