332 lines
9.3 KiB
Go
332 lines
9.3 KiB
Go
package promptdef
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"gitea.maximumdirect.net/eric/scriptorium/internal/domain"
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"gitea.maximumdirect.net/eric/scriptorium/internal/filecatalog"
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"gopkg.in/yaml.v3"
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)
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var (
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ErrPromptDefinitionNotFound = errors.New("prompt definition not found")
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ErrInvalidYAML = errors.New("invalid YAML format")
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ErrInvalidPromptDefinition = errors.New("invalid prompt definition configuration")
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)
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type filesystemRepository struct {
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dir string
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}
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type promptDefinitionFile struct {
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ID string `yaml:"id"`
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Version string `yaml:"version"`
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DefaultProfile *string `yaml:"default_profile"`
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Description string `yaml:"description"`
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SessionID string `yaml:"session_id"`
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Inputs []promptInputFile `yaml:"inputs"`
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Messages []promptMessageFile `yaml:"messages"`
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Output promptOutputContractFile `yaml:"output"`
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}
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type promptInputFile struct {
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Name string `yaml:"name"`
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Required bool `yaml:"required"`
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ContentType string `yaml:"content_type"`
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Description string `yaml:"description"`
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}
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type promptMessageFile struct {
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Role string `yaml:"role"`
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Content string `yaml:"content"`
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ContentFile string `yaml:"content_file"`
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CacheControl *cacheControlFile `yaml:"cache_control"`
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}
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type cacheControlFile struct {
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Type string `yaml:"type"`
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TTL string `yaml:"ttl"`
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}
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type promptOutputContractFile struct {
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Format domain.OutputFormat `yaml:"format"`
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ValidationMode domain.ValidationMode `yaml:"validation_mode"`
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SchemaPath string `yaml:"schema_path"`
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RepairAttempts int `yaml:"repair_attempts"`
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}
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func NewFilesystemRepository(dir string) Repository {
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return &filesystemRepository{dir: dir}
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}
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func (r *filesystemRepository) GetPromptDefinition(ctx context.Context, id string, version string) (*domain.PromptDefinition, error) {
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if strings.TrimSpace(id) == "" {
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return nil, fmt.Errorf("%w: prompt id is required", ErrInvalidPromptDefinition)
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}
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files, err := filecatalog.FindYAMLFiles(ctx, r.dir)
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if err != nil {
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return nil, fmt.Errorf("failed to read prompt definition directory: %w", err)
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}
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var matches []promptDefinitionMatch
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for _, fullPath := range files {
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select {
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case <-ctx.Done():
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return nil, ctx.Err()
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default:
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}
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relPath := filecatalog.RelativePath(r.dir, fullPath)
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fileMatch := filecatalog.Stem(filepath.Base(fullPath)) == id
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raw, err := loadPromptDefinitionFile(fullPath)
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if err != nil {
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if fileMatch || promptDefinitionFileHasID(fullPath, id) {
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return nil, fmt.Errorf("%w: %s: %v", ErrInvalidYAML, relPath, err)
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}
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continue
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}
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def, err := normalizePromptDefinition(raw, fullPath)
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if err != nil {
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if fileMatch || strings.TrimSpace(raw.ID) == id {
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return nil, fmt.Errorf("%w: %s: %v", ErrInvalidPromptDefinition, relPath, err)
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}
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continue
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}
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if def.ID != id {
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continue
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}
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if version != "" && def.Version != version {
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continue
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}
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matches = append(matches, promptDefinitionMatch{
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def: def,
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path: relPath,
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})
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}
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if len(matches) > 1 {
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paths := make([]string, 0, len(matches))
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for _, match := range matches {
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paths = append(paths, match.path)
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}
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if version != "" {
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return nil, fmt.Errorf("%w: duplicate prompt definition id %q version %q found in: %s", ErrInvalidPromptDefinition, id, version, strings.Join(paths, ", "))
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}
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return nil, fmt.Errorf("%w: duplicate prompt definition id %q found in: %s", ErrInvalidPromptDefinition, id, strings.Join(paths, ", "))
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}
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if len(matches) == 1 {
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return matches[0].def, nil
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}
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return nil, ErrPromptDefinitionNotFound
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}
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type promptDefinitionMatch struct {
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def *domain.PromptDefinition
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path string
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}
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func loadPromptDefinitionFile(path string) (*promptDefinitionFile, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("failed to read prompt definition file: %w", err)
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}
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var raw promptDefinitionFile
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decoder := yaml.NewDecoder(bytes.NewReader(data))
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decoder.KnownFields(true)
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if err := decoder.Decode(&raw); err != nil {
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return nil, err
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}
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return &raw, nil
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}
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func promptDefinitionFileHasID(path string, id string) bool {
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data, err := os.ReadFile(path)
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if err != nil {
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return false
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}
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var raw struct {
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ID string `yaml:"id"`
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}
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if err := yaml.NewDecoder(bytes.NewReader(data)).Decode(&raw); err != nil {
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return false
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}
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return strings.TrimSpace(raw.ID) == id
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}
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func normalizePromptDefinition(raw *promptDefinitionFile, sourcePath string) (*domain.PromptDefinition, error) {
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if raw == nil {
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return nil, errors.New("prompt definition is nil")
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}
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id := strings.TrimSpace(raw.ID)
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if id == "" {
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return nil, errors.New("id is required")
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}
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version := strings.TrimSpace(raw.Version)
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if version == "" {
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return nil, errors.New("version is required")
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}
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if len(raw.Messages) == 0 {
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return nil, errors.New("at least one message is required")
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}
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inputs := make([]domain.PromptInput, 0, len(raw.Inputs))
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seenInputNames := make(map[string]struct{}, len(raw.Inputs))
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for i, in := range raw.Inputs {
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name := strings.TrimSpace(in.Name)
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if name == "" {
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return nil, fmt.Errorf("input %d has empty name", i)
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}
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if _, exists := seenInputNames[name]; exists {
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return nil, fmt.Errorf("duplicate input name %q", name)
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}
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seenInputNames[name] = struct{}{}
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inputs = append(inputs, domain.PromptInput{
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Name: name,
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Required: in.Required,
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ContentType: strings.TrimSpace(in.ContentType),
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Description: strings.TrimSpace(in.Description),
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})
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}
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templates := make([]domain.PromptMessageTemplate, 0, len(raw.Messages))
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promptDir := filepath.Dir(sourcePath)
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for i, msg := range raw.Messages {
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role := strings.TrimSpace(msg.Role)
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if role == "" {
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return nil, fmt.Errorf("message %d role is required", i)
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}
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hasContent := strings.TrimSpace(msg.Content) != ""
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hasContentFile := strings.TrimSpace(msg.ContentFile) != ""
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if hasContent == hasContentFile {
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return nil, fmt.Errorf("message %d (%s) must set exactly one of content or content_file", i, role)
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}
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cacheControl, err := normalizeCacheControl(msg.CacheControl)
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if err != nil {
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return nil, fmt.Errorf("message %d (%s) cache_control: %w", i, role, err)
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}
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templateContent := msg.Content
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resolvedContentFile := ""
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if hasContentFile {
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resolvedPath := strings.TrimSpace(msg.ContentFile)
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if !filepath.IsAbs(resolvedPath) {
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resolvedPath = filepath.Join(promptDir, resolvedPath)
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}
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resolvedPath = filepath.Clean(resolvedPath)
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body, err := os.ReadFile(resolvedPath)
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if err != nil {
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return nil, fmt.Errorf("prompt %q message %d (%s): failed to read content_file %q: %w", id, i, role, msg.ContentFile, err)
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}
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templateContent = string(body)
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resolvedContentFile = resolvedPath
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}
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templates = append(templates, domain.PromptMessageTemplate{
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Role: role,
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Content: templateContent,
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ContentFile: resolvedContentFile,
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CacheControl: cacheControl,
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})
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}
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if !isValidOutputFormat(raw.Output.Format) {
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return nil, fmt.Errorf("invalid output format: %q", raw.Output.Format)
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}
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if !isValidValidationMode(raw.Output.ValidationMode) {
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return nil, fmt.Errorf("invalid validation mode: %q", raw.Output.ValidationMode)
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}
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if raw.Output.ValidationMode == domain.ValidationJSONSchema && strings.TrimSpace(raw.Output.SchemaPath) == "" {
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return nil, errors.New("output.schema_path is required when output.validation_mode is json_schema")
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}
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if raw.Output.RepairAttempts < 0 {
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return nil, errors.New("output.repair_attempts must be greater than or equal to 0")
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}
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defaultProfile := ""
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if raw.DefaultProfile != nil {
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defaultProfile = strings.TrimSpace(*raw.DefaultProfile)
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if defaultProfile == "" {
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return nil, errors.New("default_profile must be a non-empty string when set")
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}
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}
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return &domain.PromptDefinition{
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ID: id,
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Version: version,
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DefaultProfile: defaultProfile,
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Description: strings.TrimSpace(raw.Description),
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SessionID: strings.TrimSpace(raw.SessionID),
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Inputs: inputs,
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Templates: templates,
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OutputFormat: raw.Output.Format,
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Validation: domain.OutputContract{
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Format: raw.Output.Format,
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ValidationMode: raw.Output.ValidationMode,
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SchemaPath: strings.TrimSpace(raw.Output.SchemaPath),
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RepairAttempts: raw.Output.RepairAttempts,
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},
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}, nil
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}
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func normalizeCacheControl(raw *cacheControlFile) (*domain.CacheControl, error) {
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if raw == nil {
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return nil, nil
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}
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cacheType := strings.TrimSpace(raw.Type)
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if cacheType == "" {
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return nil, errors.New("type is required")
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}
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if domain.CacheControlType(cacheType) != domain.CacheControlEphemeral {
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return nil, fmt.Errorf("unsupported type %q", cacheType)
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}
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ttl := strings.TrimSpace(raw.TTL)
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if ttl != "" && ttl != "1h" {
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return nil, fmt.Errorf("unsupported ttl %q", ttl)
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}
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return &domain.CacheControl{
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Type: domain.CacheControlType(cacheType),
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TTL: ttl,
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}, nil
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}
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func isValidOutputFormat(f domain.OutputFormat) bool {
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switch f {
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case domain.FormatText, domain.FormatMarkdown, domain.FormatJSON:
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return true
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default:
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return false
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}
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}
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func isValidValidationMode(m domain.ValidationMode) bool {
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switch m {
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case domain.ValidationNone, domain.ValidationBasic, domain.ValidationJSON, domain.ValidationJSONSchema:
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return true
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default:
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return false
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}
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}
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