Add configurable report module composition

internal/config/config.go

@@ -2,7 +2,13 @@
 // precedence, and validation.
 package config
 
-import "time"
+import (
+	"fmt"
+	"time"
+
+	"gitea.maximumdirect.net/eric/weatherreporter/internal/module"
+	"gopkg.in/yaml.v3"
+)
 
 type MissingSourcePolicy string
 type NotifyFailurePolicy string
@@ -16,15 +22,16 @@ const (
 )
 
 type Config struct {
-	WeatherAPI    WeatherAPIConfig    `yaml:"weather_api"`
-	Location      LocationConfig      `yaml:"location"`
-	Secrets       SecretsConfig       `yaml:"secrets"`
-	Notify        NotifyConfig        `yaml:"notify"`
-	MissingSource MissingSourceConfig `yaml:"missing_source"`
-	Scriptorium   ScriptoriumConfig   `yaml:"scriptorium"`
-	Workspace     WorkspaceConfig     `yaml:"workspace"`
-	Dayparts      []DaypartConfig     `yaml:"dayparts"`
-	RecentChange  RecentChangeConfig  `yaml:"recent_change"`
+	WeatherAPI    WeatherAPIConfig        `yaml:"weather_api"`
+	Location      LocationConfig          `yaml:"location"`
+	Secrets       SecretsConfig           `yaml:"secrets"`
+	Notify        NotifyConfig            `yaml:"notify"`
+	MissingSource MissingSourceConfig     `yaml:"missing_source"`
+	Scriptorium   ScriptoriumConfig       `yaml:"scriptorium"`
+	Workspace     WorkspaceConfig         `yaml:"workspace"`
+	Dayparts      []DaypartConfig         `yaml:"dayparts"`
+	RecentChange  RecentChangeConfig      `yaml:"recent_change"`
+	Reports       map[string]ReportConfig `yaml:"reports"`
 }
 
 type WeatherAPIConfig struct {
@@ -96,3 +103,71 @@ type RecentChangeConfig struct {
 	WindGustMilesPerHour     int     `yaml:"wind_gust_miles_per_hour"`
 	PrecipTimingShiftMinutes int     `yaml:"precip_timing_shift_minutes"`
 }
+
+type ReportConfig struct {
+	DeterministicModules    []ModuleConfigItem `yaml:"deterministic_modules"`
+	deterministicModulesSet bool
+}
+
+type ModuleConfigItem struct {
+	ID      module.ID `yaml:"id"`
+	Options any       `yaml:"options,omitempty"`
+}
+
+func (c *ReportConfig) UnmarshalYAML(value *yaml.Node) error {
+	if value.Kind != yaml.MappingNode {
+		return fmt.Errorf("report entry must be a mapping")
+	}
+	for i := 0; i < len(value.Content); i += 2 {
+		key := value.Content[i].Value
+		node := value.Content[i+1]
+		switch key {
+		case "deterministic_modules":
+			if err := node.Decode(&c.DeterministicModules); err != nil {
+				return err
+			}
+			c.deterministicModulesSet = true
+		default:
+			return fmt.Errorf("unknown report entry field %q", key)
+		}
+	}
+	return nil
+}
+
+func (m *ModuleConfigItem) UnmarshalYAML(value *yaml.Node) error {
+	switch value.Kind {
+	case yaml.ScalarNode:
+		if value.Value == "" {
+			return fmt.Errorf("module id is required")
+		}
+		m.ID = module.ID(value.Value)
+		return nil
+	case yaml.MappingNode:
+		var sawID bool
+		for i := 0; i < len(value.Content); i += 2 {
+			key := value.Content[i].Value
+			node := value.Content[i+1]
+			switch key {
+			case "id":
+				if err := node.Decode(&m.ID); err != nil {
+					return err
+				}
+				sawID = true
+			case "options":
+				var options any
+				if err := node.Decode(&options); err != nil {
+					return err
+				}
+				m.Options = options
+			default:
+				return fmt.Errorf("unknown module entry field %q", key)
+			}
+		}
+		if !sawID || m.ID == "" {
+			return fmt.Errorf("module id is required")
+		}
+		return nil
+	default:
+		return fmt.Errorf("module entry must be a string or mapping")
+	}
+}