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package main
import (
"context"
"fmt"
"os"
"path/filepath"
"regexp"
"strings"
"time"
"github.com/adrg/frontmatter"
cfgpkg "github.com/mediocregopher/blog.mediocregopher.com/srv/cfg"
"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
"github.com/mediocregopher/mediocre-go-lib/v2/mctx"
"github.com/mediocregopher/mediocre-go-lib/v2/mlog"
)
type postFrontmatter struct {
Title string `yaml:"title"`
Description string `yaml:"description"`
Tags string `yaml:"tags"`
Series string `yaml:"series"`
Updated string `yaml:"updated"`
}
func parseDate(str string) (time.Time, error) {
const layout = "2006-01-02"
return time.Parse(layout, str)
}
var postNameRegexp = regexp.MustCompile(`(20..-..-..)-([^.]+).md`)
func importPost(postStore post.Store, path string) (post.StoredPost, error) {
fileName := filepath.Base(path)
fileNameMatches := postNameRegexp.FindStringSubmatch(fileName)
if len(fileNameMatches) != 3 {
return post.StoredPost{}, fmt.Errorf("file name %q didn't match regex", fileName)
}
publishedAtStr := fileNameMatches[1]
publishedAt, err := parseDate(publishedAtStr)
if err != nil {
return post.StoredPost{}, fmt.Errorf("parsing publish date %q: %w", publishedAtStr, err)
}
postID := fileNameMatches[2]
f, err := os.Open(path)
if err != nil {
return post.StoredPost{}, fmt.Errorf("opening file: %w", err)
}
defer f.Close()
var matter postFrontmatter
body, err := frontmatter.Parse(f, &matter)
if err != nil {
return post.StoredPost{}, fmt.Errorf("parsing frontmatter: %w", err)
}
// if there is already a post for this ID, delete it, we're overwriting
if err := postStore.Delete(postID); err != nil {
return post.StoredPost{}, fmt.Errorf("deleting post id %q: %w", postID, err)
}
p := post.Post{
ID: postID,
Title: matter.Title,
Description: matter.Description,
Tags: strings.Fields(matter.Tags),
Series: matter.Series,
Body: string(body),
}
if err := postStore.Set(p, publishedAt); err != nil {
return post.StoredPost{}, fmt.Errorf("storing post id %q: %w", p.ID, err)
}
if matter.Updated != "" {
lastUpdatedAt, err := parseDate(matter.Updated)
if err != nil {
return post.StoredPost{}, fmt.Errorf("parsing updated date %q: %w", matter.Updated, err)
}
// as a hack, we store the post again with the updated date as now. This
// will update the LastUpdatedAt field in the Store.
if err := postStore.Set(p, lastUpdatedAt); err != nil {
return post.StoredPost{}, fmt.Errorf("updating post id %q: %w", p.ID, err)
}
}
storedPost, err := postStore.GetByID(p.ID)
if err != nil {
return post.StoredPost{}, fmt.Errorf("retrieving stored post by id %q: %w", p.ID, err)
}
return storedPost, nil
}
func main() {
ctx := context.Background()
cfg := cfgpkg.NewBlogCfg(cfgpkg.Params{})
var dataDir cfgpkg.DataDir
dataDir.SetupCfg(cfg)
defer dataDir.Close()
ctx = mctx.WithAnnotator(ctx, &dataDir)
paths := cfg.Args("<post file paths...>")
// initialization
err := cfg.Init(ctx)
logger := mlog.NewLogger(nil)
defer logger.Close()
logger.Info(ctx, "process started")
defer logger.Info(ctx, "process exiting")
if err != nil {
logger.Fatal(ctx, "initializing", err)
}
if len(*paths) == 0 {
logger.FatalString(ctx, "no paths given")
}
postDB, err := post.NewSQLDB(dataDir)
if err != nil {
logger.Fatal(ctx, "initializing post sql db", err)
}
defer postDB.Close()
postStore := post.NewStore(postDB)
for _, path := range *paths {
ctx := mctx.Annotate(ctx, "postPath", path)
storedPost, err := importPost(postStore, path)
if err != nil {
logger.Error(ctx, "importing post", err)
}
ctx = mctx.Annotate(ctx,
"postID", storedPost.ID,
"postTitle", storedPost.Title,
"postDescription", storedPost.Description,
"postTags", storedPost.Tags,
"postSeries", storedPost.Series,
"postPublishedAt", storedPost.PublishedAt,
)
if !storedPost.LastUpdatedAt.IsZero() {
ctx = mctx.Annotate(ctx,
"postLastUpdatedAt", storedPost.LastUpdatedAt)
}
logger.Info(ctx, "post stored")
}
}
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