mirror of
https://github.com/TwiN/gatus.git
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106 lines
3.3 KiB
Go
106 lines
3.3 KiB
Go
package gotify
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"net/http"
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"github.com/TwiN/gatus/v5/alerting/alert"
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"github.com/TwiN/gatus/v5/client"
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"github.com/TwiN/gatus/v5/core"
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)
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const DefaultPriority = 5
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// AlertProvider is the configuration necessary for sending an alert using Gotify
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type AlertProvider struct {
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// ServerURL is the URL of the Gotify server
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ServerURL string `yaml:"server-url"`
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// Token is the token to use when sending a message to the Gotify server
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Token string `yaml:"token"`
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// Priority is the priority of the message
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Priority int `yaml:"priority,omitempty"` // Defaults to DefaultPriority
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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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// Title is the title of the message that will be sent
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Title string `yaml:"title,omitempty"`
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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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if provider.Priority == 0 {
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provider.Priority = DefaultPriority
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}
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return len(provider.ServerURL) > 0 && len(provider.Token) > 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(provider.buildRequestBody(endpoint, alert, result, resolved))
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request, err := http.NewRequest(http.MethodPost, provider.ServerURL+"/message?token="+provider.Token, 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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defer response.Body.Close()
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if response.StatusCode > 399 {
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body, _ := io.ReadAll(response.Body)
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return fmt.Errorf("failed to send alert to Gotify: %s", string(body))
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}
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return nil
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}
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type Body struct {
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Message string `json:"message"`
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Title string `json:"title"`
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Priority int `json:"priority"`
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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) []byte {
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var message, 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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} 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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}
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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 = "✓"
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} else {
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prefix = "✕"
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}
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results += fmt.Sprintf("\n%s - %s", prefix, conditionResult.Condition)
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}
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if len(alert.GetDescription()) > 0 {
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message += " with the following description: " + alert.GetDescription()
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}
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message += results
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title := "Gatus: " + endpoint.DisplayName()
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if provider.Title != "" {
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title = provider.Title
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}
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body, _ := json.Marshal(Body{
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Message: message,
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Title: title,
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Priority: provider.Priority,
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})
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return body
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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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