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https://github.com/TwiN/gatus.git
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79c9f24c15
* feat(alerting): Implement alert-level provider overrides Fixes #96 * Fix tests * Add missing test cases for alerting providers * feat(alerting): Implement alert-level overrides on all providers * chore: Add config.yaml to .gitignore * fix typo in discord provider * test: Start fixing tests for alerting providers * test: Fix GitLab tests * Fix all tests * test: Improve coverage * test: Improve coverage * Rename override to provider-override * docs: Mention new provider-override config * test: Improve coverage * test: Improve coverage * chore: Rename Alert.OverrideAsBytes to Alert.ProviderOverrideAsBytes
192 lines
5.7 KiB
Go
192 lines
5.7 KiB
Go
package telegram
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import (
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"bytes"
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"encoding/json"
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"errors"
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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/config/endpoint"
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"gopkg.in/yaml.v3"
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)
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const defaultApiUrl = "https://api.telegram.org"
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var (
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ErrTokenNotSet = errors.New("token not set")
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ErrIDNotSet = errors.New("id not set")
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ErrDuplicateGroupOverride = errors.New("duplicate group override")
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)
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type Config 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 *client.Config `yaml:"client,omitempty"`
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}
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func (cfg *Config) Validate() error {
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if len(cfg.ApiUrl) == 0 {
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cfg.ApiUrl = defaultApiUrl
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}
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if len(cfg.Token) == 0 {
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return ErrTokenNotSet
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}
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if len(cfg.ID) == 0 {
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return ErrIDNotSet
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}
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return nil
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}
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func (cfg *Config) Merge(override *Config) {
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if override.ClientConfig != nil {
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cfg.ClientConfig = override.ClientConfig
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}
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if len(override.Token) > 0 {
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cfg.Token = override.Token
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}
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if len(override.ID) > 0 {
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cfg.ID = override.ID
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}
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if len(override.ApiUrl) > 0 {
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cfg.ApiUrl = override.ApiUrl
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}
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}
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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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DefaultConfig Config `yaml:",inline"`
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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 overrides 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 configuration that may be prioritized over the default configuration
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type Override struct {
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Group string `yaml:"group"`
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Config `yaml:",inline"`
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}
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// Validate the provider's configuration
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func (provider *AlertProvider) Validate() error {
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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 == "" {
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return ErrDuplicateGroupOverride
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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 provider.DefaultConfig.Validate()
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}
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// Send an alert using the provider
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func (provider *AlertProvider) Send(ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) error {
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cfg, err := provider.GetConfig(ep.Group, alert)
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if err != nil {
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return err
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}
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buffer := bytes.NewBuffer(provider.buildRequestBody(cfg, ep, alert, result, resolved))
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request, err := http.NewRequest(http.MethodPost, fmt.Sprintf("%s/bot%s/sendMessage", cfg.ApiUrl, cfg.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(cfg.ClientConfig).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("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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type Body struct {
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ChatID string `json:"chat_id"`
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Text string `json:"text"`
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ParseMode string `json:"parse_mode"`
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}
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// buildRequestBody builds the request body for the provider
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func (provider *AlertProvider) buildRequestBody(cfg *Config, ep *endpoint.Endpoint, alert *alert.Alert, result *endpoint.Result, resolved bool) []byte {
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var message 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— ", ep.DisplayName(), alert.SuccessThreshold)
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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— ", ep.DisplayName(), alert.FailureThreshold)
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}
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var formattedConditionResults string
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if len(result.ConditionResults) > 0 {
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formattedConditionResults = "\n*Condition results*\n"
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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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formattedConditionResults += fmt.Sprintf("%s - `%s`\n", prefix, conditionResult.Condition)
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}
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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%s", message, alert.GetDescription(), formattedConditionResults)
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} else {
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text = fmt.Sprintf("⛑ *Gatus* \n%s%s", message, formattedConditionResults)
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}
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bodyAsJSON, _ := json.Marshal(Body{
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ChatID: cfg.ID,
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Text: text,
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ParseMode: "MARKDOWN",
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})
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return bodyAsJSON
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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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// GetConfig returns the configuration for the provider with the overrides applied
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func (provider *AlertProvider) GetConfig(group string, alert *alert.Alert) (*Config, error) {
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cfg := provider.DefaultConfig
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// Handle group overrides
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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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cfg.Merge(&override.Config)
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break
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}
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}
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}
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// Handle alert overrides
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if len(alert.ProviderOverride) != 0 {
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overrideConfig := Config{}
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if err := yaml.Unmarshal(alert.ProviderOverrideAsBytes(), &overrideConfig); err != nil {
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return nil, err
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}
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cfg.Merge(&overrideConfig)
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}
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// Validate the configuration
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err := cfg.Validate()
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return &cfg, err
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}
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// ValidateOverrides validates the alert's provider override and, if present, the group override
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func (provider *AlertProvider) ValidateOverrides(group string, alert *alert.Alert) error {
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_, err := provider.GetConfig(group, alert)
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return err
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}
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