mirror of
https://github.com/TwiN/gatus.git
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90 lines
3.2 KiB
Go
90 lines
3.2 KiB
Go
package telegram
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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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const defaultAPIURL = "https://api.telegram.org"
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// AlertProvider is the configuration necessary for sending an alert using Telegram
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type AlertProvider struct {
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Token string `yaml:"token"`
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ID string `yaml:"id"`
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APIURL string `yaml:"api-url"`
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// ClientConfig is the configuration of the client used to communicate with the provider's target
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ClientConfig *client.Config `yaml:"client,omitempty"`
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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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}
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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.ClientConfig == nil {
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provider.ClientConfig = client.GetDefaultConfig()
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}
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return len(provider.Token) > 0 && len(provider.ID) > 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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apiURL := provider.APIURL
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if apiURL == "" {
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apiURL = defaultAPIURL
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}
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request, err := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/bot%s/sendMessage", apiURL, 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(provider.ClientConfig).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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if resolved {
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message = fmt.Sprintf("An alert for *%s* has been resolved:\\n—\\n _healthcheck passing successfully %d time(s) in a row_\\n— ", endpoint.DisplayName(), alert.FailureThreshold)
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} else {
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message = fmt.Sprintf("An alert for *%s* has been triggered:\\n—\\n _healthcheck failed %d time(s) in a row_\\n— ", 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("%s - `%s`\\n", prefix, conditionResult.Condition)
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}
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var text string
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if len(alert.GetDescription()) > 0 {
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text = fmt.Sprintf("⛑ *Gatus* \\n%s \\n*Description* \\n_%s_ \\n\\n*Condition results*\\n%s", message, alert.GetDescription(), results)
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} else {
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text = fmt.Sprintf("⛑ *Gatus* \\n%s \\n*Condition results*\\n%s", message, results)
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}
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return fmt.Sprintf(`{"chat_id": "%s", "text": "%s", "parse_mode": "MARKDOWN"}`, provider.ID, text)
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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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