Refactor Knowledge struct into shared package

Moved the Knowledge struct and related types to the shared package, updating all references across the codebase. This improves modularity and enables better reuse of the Knowledge type across different components.

pkg/agents/youtube.go

@@ -3,25 +3,28 @@ package agents
 import (
 	"context"
 	"fmt"
-	"github.com/asticode/go-astisub"
-	"github.com/lrstanley/go-ytdlp"
 	"io"
 	"log/slog"
 	"net/url"
 	"os"
 	"path/filepath"
+
+	"github.com/asticode/go-astisub"
+	"github.com/lrstanley/go-ytdlp"
+
+	"gitea.stevedudenhoeffer.com/steve/answer/pkg/agents/shared"
 )
 
 func init() {
 	ytdlp.MustInstall(context.Background(), nil)
 }
 
-func (a Agent) ReadYouTubeTranscript(ctx context.Context, u *url.URL, questions []string) (Knowledge, error) {
+func (a Agent) ReadYouTubeTranscript(ctx context.Context, u *url.URL, questions []string) (shared.Knowledge, error) {
 	dlp := ytdlp.New()
 
 	tmpDir, err := os.MkdirTemp("", "mort-ytdlp-")
 	if err != nil {
-		return Knowledge{}, fmt.Errorf("error creating temp dir: %w", err)
+		return shared.Knowledge{}, fmt.Errorf("error creating temp dir: %w", err)
 	}
 
 	slog.Info("created temp dir", "path", tmpDir)
@@ -40,15 +43,15 @@ func (a Agent) ReadYouTubeTranscript(ctx context.Context, u *url.URL, questions
 
 	res, err := dlp.Run(ctx, u.String())
 	if err != nil {
-		return Knowledge{}, fmt.Errorf("error running yt-dlp: %w", err)
+		return shared.Knowledge{}, fmt.Errorf("error running yt-dlp: %w", err)
 	}
 
 	if res == nil {
-		return Knowledge{}, fmt.Errorf("yt-dlp returned nil")
+		return shared.Knowledge{}, fmt.Errorf("yt-dlp returned nil")
 	}
 
 	if res.ExitCode != 0 {
-		return Knowledge{}, fmt.Errorf("yt-dlp exited with code %d", res.ExitCode)
+		return shared.Knowledge{}, fmt.Errorf("yt-dlp exited with code %d", res.ExitCode)
 	}
 
 	// the transcript for this video now _should_ be at tmpDir/subs.en.vtt, however if it's not then just fine any
@@ -60,7 +63,7 @@ func (a Agent) ReadYouTubeTranscript(ctx context.Context, u *url.URL, questions
 		vttFile = ""
 		files, err := os.ReadDir(tmpDir)
 		if err != nil {
-			return Knowledge{}, fmt.Errorf("error reading directory: %w", err)
+			return shared.Knowledge{}, fmt.Errorf("error reading directory: %w", err)
 		}
 
 		for _, file := range files {
@@ -72,7 +75,7 @@ func (a Agent) ReadYouTubeTranscript(ctx context.Context, u *url.URL, questions
 	}
 
 	if vttFile == "" {
-		return Knowledge{}, fmt.Errorf("no vtt file found")
+		return shared.Knowledge{}, fmt.Errorf("no vtt file found")
 	}
 
 	fp, err := os.Open(vttFile)
@@ -83,16 +86,16 @@ func (a Agent) ReadYouTubeTranscript(ctx context.Context, u *url.URL, questions
 		}
 	}(fp)
 	if err != nil {
-		return Knowledge{}, fmt.Errorf("error opening vtt file: %w", err)
+		return shared.Knowledge{}, fmt.Errorf("error opening vtt file: %w", err)
 	}
 
 	subs, err := astisub.ReadFromWebVTT(fp)
 	if err != nil {
-		return Knowledge{}, fmt.Errorf("error reading vtt file: %w", err)
+		return shared.Knowledge{}, fmt.Errorf("error reading vtt file: %w", err)
 	}
 
 	if len(subs.Items) == 0 {
-		return Knowledge{}, fmt.Errorf("no subtitles found")
+		return shared.Knowledge{}, fmt.Errorf("no subtitles found")
 	}
 
 	var ts string