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fix(notifications)!: take each provider's config as a typed struct - #281
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📝 WalkthroughWalkthroughNotification provider configuration now uses ChangesNotification Settings
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant YAMLDecoder
participant Settings.UnmarshalYAML
participant NewManager
participant Provider.Configure
participant Settings.Decode
YAMLDecoder->>Settings.UnmarshalYAML: provider settings mapping
NewManager->>Provider.Configure: provider Settings
Provider.Configure->>Settings.Decode: typed provider config destination
Merge Risk: 🟡 Moderate · up to Provider settings are now decoded by each provider, which fixes the startup failure for numeric-looking secrets. Three issues remain. Printing a configuration can still reveal credentials. Saving or round-tripping a configuration silently drops provider settings. Existing email configs that use env: or file: token references will start normally but fail to authenticate. Address these, or explicitly accept them, before merging. 🚥 Pre-merge checks | ✅ 3 | ❌ 2❌ Failed checks (2 warnings)
✅ Passed checks (3 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 61.54% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 13 functions across 12 files. (2 skipped: 2 unsupported.) Full details: Description checkExplanation The description gives a detailed account, but it describes a different API change than the pull request. It says Resolution Revise the description to match the changes: explain how
✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Actionable comments posted: 3
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @notifications/providers/email.go:
- Line 59: Update Configure’s token handling before constructing e.client with
remote.NewClient so existing env: and file: token references are resolved as
before; if reference support is intentionally removed, reject those values
explicitly rather than sending them literally as bearer tokens.
Review comments at @notifications/settings.go:
- Around line 31-36: Implement redacted formatting for the Settings type so
formatting a Config with `%+v` cannot expose values held in Settings.value,
including maps and nested data. Add the appropriate formatting method to
Settings and ensure it emits only a redacted representation; do not rely on the
fields being unexported.
- Around line 33-37: Add representation-aware JSON and YAML marshaling to
Settings so Config serialization preserves each populated provider setting from
its stored raw, node, or value representation instead of emitting an empty
object.
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📒 Files selected for processing (14)
notifications/README.mdnotifications/config.gonotifications/config_test.gonotifications/config_yaml_test.gonotifications/go.modnotifications/manager.gonotifications/manager_test.gonotifications/provider.gonotifications/providers/config_tags_test.gonotifications/providers/email.gonotifications/providers/email_test.gonotifications/providers/sms.gonotifications/settings.gonotifications/test/integration/sms_integration_test.go
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Thanks for tracking this down. The bug is real: Root causeThe values get mangled because
All of this exists to keep the "Manager hands each provider a blob of settings via Proposed design: typed config per provider, passed to the constructorEach provider exports its own config struct with // notifications/providers
type SMSConfig struct {
BaseURL string `yaml:"baseURL"`
SIDCode string `yaml:"sidCode"`
UserName string `yaml:"userName"`
Password string `yaml:"password"`
}
// NewSMSProvider validates cfg and returns a ready provider.
func NewSMSProvider(cfg SMSConfig) (*SMSProvider, error)
type EmailConfig struct {
BaseURL string `yaml:"baseURL"`
Token string `yaml:"token"`
}
func NewEmailProvider(cfg EmailConfig) (*EmailProvider, error)// notifications
type Provider interface {
Type() ChannelType
Send(ctx context.Context, req Request) error
}
func NewManager(providers ...Provider) (*Manager, error)// application
type AppConfig struct {
Notifications struct {
SMS providers.SMSConfig `yaml:"sms"`
Email providers.EmailConfig `yaml:"email"`
} `yaml:"notifications"`
}
var cfg AppConfig
err := configyaml.LoadAndExpand("config.yaml", &cfg)
sms, err := providers.NewSMSProvider(cfg.Notifications.SMS)
email, err := providers.NewEmailProvider(cfg.Notifications.Email)
mgr, err := notification.NewManager(sms, email)What this gets us:
Rough size
That's about 350 fewer lines than the PR, and a little below where Keep from this PR
It's still a breaking change, but the PR is already marked |
Config.Providers held each provider's settings as map[string]any, handed
to the provider's Configure as JSON. Once YAML decodes into any, the
original text is gone: a password of 12345678 became an int, a SID code
of 0123 the octal 83, a token of true a bool, and the providers, which
read those as strings, refused to start. configyaml re-infers a resolved
placeholder the same way, so a secret that only looked like a number
broke startup however it was quoted.
The Manager doesn't need to carry provider config at all: the caller
already builds the providers. Each provider now exports its own config
struct with yaml tags (SMSConfig, EmailConfig) and takes it in its
constructor, which validates it and returns a ready provider. The
application embeds those structs in its own config and loads them with
configyaml, as with database.Config and cors.Config. Values decode
straight into their fields' types, so number-looking secrets stay
strings, and each provider owns its config's shape.
Provider is just Type and Send, and NewManager takes the providers.
Config, Configure, Config.Providers and ErrProvidersRequired are gone;
NewManager returns ErrNoProviders when given none.
The email token is now a plain string instead of a secret.SecretRef.
With configyaml resolving {{env:}}/{{file:}} placeholders first, the
SecretRef resolved the token a second time, so a token starting with
"file:" or "env:" was read as a file path or env var name.
BREAKING CHANGE: build providers with providers.NewSMSProvider(cfg) and
providers.NewEmailProvider(cfg), then call NewManager(providers...).
Config and Provider.Configure are removed. The email token is used as
written; the brace-less env:/file:/literal: forms are no longer resolved.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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sthanikan2000
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Thanks @mushrafmim, agreed: this is simpler and fixes the root cause. Reworked in b3324f6 along those lines:
The diff against |
2 participants
Summary
Fixes a startup failure.
Config.Providersheld each provider's settings asmap[string]any, and once YAML decodes intoany, the original text is gone. A password of12345678became anint, a SID code of0123the octal83, and a token oftrueabool, and the providers, which read those as strings, refused to start. configyaml re-infers a resolved{{env:…}}the same way, so quoting couldn't prevent it.Following @mushrafmim's suggestion, the Manager no longer carries provider config. Each provider exports a typed config struct and takes it in its constructor. Values decode straight into string fields, so the bug can't happen, and each provider owns its config's shape.
Type of Change
Changes Made
providers: exportedSMSConfigandEmailConfig, withyamltags.NewSMSProvider(cfg)andNewEmailProvider(cfg)validate their config and return a ready provider, or an error.Provideris justType()andSend().NewManager(providers ...Provider)takes the built providers. It returnsErrNoProviderswhen given none, and an error for a nil provider or two providers on one channel.Config,Config.Providers,Provider.Configure,ErrProvidersRequired, and the JSON round trip inNewManager.secret.SecretRef. With configyaml resolving{{env:}}/{{file:}}first,SecretRefresolved it a second time: a token starting withfile:was read as a file path, and one starting withenv:as an env var name.notificationsno longer importssecret; it stays ingo.modonly indirectly, throughremote.gopkg.in/yaml.v3is a test-only dependency, used byproviders_test.go.Against
main: 12 files, +259/−270.Testing
I have tested this change locally
I have added tests that prove my fix is effective or that my feature works
I have tested edge cases
All existing tests pass
providers_test.go:password: 12345678,sidCode: 0123andtoken: true, decoded into the typed configs inside an app config struct, keeps all three as written, and both constructors accept them.baseURL.file:/not/a/path/on/this/machineis sent asBearer file:/not/a/path/on/this/machine. Onmain,Configurefails trying to read that file.manager_test.go: routing, no providers (ErrNoProviders), a nil provider, a duplicate channel, plus the existingSendcases.The SMS integration test builds its provider with
NewSMSProvider.End to end: a scratch module loads a file through the real
configyaml.LoadAndExpand, with{{env:}}placeholders set to12345678/0123/true. It decodes them as those strings, andNewManagerstarts with both real providers.go vetandgo test -race ./...innotificationspass, and the pre-commit hooks passed.Checklist
Related Issues
Found reviewing OpenNSW/nsw-srilanka#571, which loads notification settings from
config.yaml.Screenshots/Demo
N/A
Additional Notes
Breaking:
providers.NewSMSProvider(cfg)andproviders.NewEmailProvider(cfg), then callNewManager(providers...).ConfigandConfigureare removed.