feat: done vibing

internal/output/output.go

@@ -0,0 +1,43 @@
+// Package output defines the pluggable destination interface and its
+// implementations (currently Discord webhook).
+package output
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/ytshih/stonks/internal/config"
+	"github.com/ytshih/stonks/internal/report"
+)
+
+// Output delivers the final report somewhere (Discord, Slack, email, ...).
+// Implementations decide how to render report.Text and the optional
+// report.Recommendations (e.g. Discord sends the text as chunked messages
+// followed by a short recommendations embed).
+type Output interface {
+	Name() string
+	Send(ctx context.Context, rep report.Report) error
+}
+
+// Constructor builds an Output from its PluginConfig (name + params).
+type Constructor func(cfg config.PluginConfig) (Output, error)
+
+var registry = map[string]Constructor{}
+
+// Register makes an output constructor available under name. Called from
+// each output implementation's init().
+func Register(name string, ctor Constructor) {
+	if _, exists := registry[name]; exists {
+		panic(fmt.Sprintf("output: constructor already registered for %q", name))
+	}
+	registry[name] = ctor
+}
+
+// Build looks up the constructor for cfg.Name and invokes it.
+func Build(cfg config.PluginConfig) (Output, error) {
+	ctor, ok := registry[cfg.Name]
+	if !ok {
+		return nil, fmt.Errorf("output: no output registered for %q", cfg.Name)
+	}
+	return ctor(cfg)
+}