From 73d4a3658ca14527e8a749bb8850a2c8e4bfac88 Mon Sep 17 00:00:00 2001
From: SayaAndy <montferrat@tuta.io>
Date: Tue, 12 Aug 2025 22:33:41 +0700
Subject: feat: integrate parallel execution refactor: simplify frontmatter
 parser feat: always check for '.md' extension feat: new timezone field

---
 main.go | 90 +++++++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 51 insertions(+), 39 deletions(-)

(limited to 'main.go')

diff --git a/main.go b/main.go
index 4ff2f98..7c50824 100644
--- a/main.go
+++ b/main.go
@@ -4,6 +4,7 @@ import (
 	"flag"
 	"log/slog"
 	"os"
+	"sync"
 
 	"github.com/SayaAndy/saya-today-article-metadata-add/config"
 	"github.com/SayaAndy/saya-today-article-metadata-add/internal/frontmatter"
@@ -42,44 +43,55 @@ func main() {
 	}
 	generalLogger.Info("scanned files", slog.Int("file_count", len(files)))
 
-	for _, file := range files {
-		if !storageClient.FileHasChanged(file) {
-			generalLogger.Debug("skipped a file because it has not changed since last parse", slog.String("file", file))
-			continue
-		}
-		generalLogger.Debug("processing a file", slog.String("file", file))
-
-		reader, sz, err := storageClient.GetReader(file)
-		if err != nil {
-			generalLogger.Warn("fail to get reader for a file", slog.String("file", file), slog.String("error", err.Error()))
-			continue
-		}
-		defer reader.Close()
-
-		content := make([]byte, sz)
-		ln, err := reader.Read(content)
-		if err != nil {
-			generalLogger.Warn("fail to read content from a file", slog.String("file", file), slog.String("error", err.Error()))
-			continue
-		}
-		generalLogger.Debug("read content from a file",
-			slog.String("file", file),
-			slog.Int64("expected_size", sz),
-			slog.Int("output_size", ln))
-
-		metadata, _, err := frontmatter.ParseFrontmatter(content)
-		if err != nil {
-			generalLogger.Warn("fail to parse frontmatter of a file", slog.String("file", file), slog.String("error", err.Error()))
-			continue
-		}
-
-		if metadata == nil {
-			generalLogger.Info("skip a file due to it not having metadata", slog.String("file", file))
-			continue
-		}
-
-		if err = storageClient.WriteMetadata(file, metadata); err != nil {
-			generalLogger.Warn("fail to write metadata to a file", slog.String("file", file), slog.String("error", err.Error()))
-		}
+	semaphore := make(chan struct{}, cfg.MaxConcurrentJobs)
+	var wg sync.WaitGroup
+	wg.Add(len(files))
+
+	for i, file := range files {
+		semaphore <- struct{}{}
+		go func(index int, inputName string) {
+			defer wg.Done()
+			defer func() { <-semaphore }()
+			if !storageClient.FileHasChanged(file) {
+				generalLogger.Debug("skipped a file because it has not changed since last parse", slog.String("file", file))
+				return
+			}
+			generalLogger.Debug("processing a file", slog.String("file", file))
+
+			reader, sz, err := storageClient.GetReader(file)
+			if err != nil {
+				generalLogger.Warn("fail to get reader for a file", slog.String("file", file), slog.String("error", err.Error()))
+				return
+			}
+			defer reader.Close()
+
+			content := make([]byte, sz)
+			ln, err := reader.Read(content)
+			if err != nil {
+				generalLogger.Warn("fail to read content from a file", slog.String("file", file), slog.String("error", err.Error()))
+				return
+			}
+			generalLogger.Debug("read content from a file",
+				slog.String("file", file),
+				slog.Int64("expected_size", sz),
+				slog.Int("output_size", ln))
+
+			metadata, _, err := frontmatter.ParseFrontmatter(content)
+			if err != nil {
+				generalLogger.Warn("fail to parse frontmatter of a file", slog.String("file", file), slog.String("error", err.Error()))
+				return
+			}
+
+			if metadata == nil {
+				generalLogger.Info("skip a file due to it not having metadata", slog.String("file", file))
+				return
+			}
+
+			if err = storageClient.WriteMetadata(file, metadata); err != nil {
+				generalLogger.Warn("fail to write metadata to a file", slog.String("file", file), slog.String("error", err.Error()))
+			}
+		}(i, file)
 	}
+
+	wg.Wait()
 }
-- 
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