/
main.go
239 lines (198 loc) · 4.68 KB
/
main.go
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package main
import (
"context"
"encoding/json"
"flag"
"fmt"
"io"
"net/http"
"os"
"os/exec"
"path/filepath"
"strings"
"github.com/voldyman/emos"
"github.com/voldyman/emos/internal/config"
"golang.org/x/sync/errgroup"
)
const (
workerCount = 10
)
var (
searchFlag = flag.Bool("search", false, "searches an emoji")
updateFlag = flag.Bool("update", false, "updates the emoji database")
)
func main() {
flag.Parse()
err := fmt.Errorf("no command specified")
if *updateFlag {
err = runUpdate()
}
if updatedNeeded() {
forkUpdate()
}
if *searchFlag {
err = runSearch(strings.Join(flag.Args(), " "))
}
if err != nil {
fmt.Fprintf(os.Stderr, "Error: %s\n", err)
os.Exit(1)
}
}
func runUpdate() error {
emos, err := newEmos()
if err != nil {
return fmt.Errorf("failed to start emoji search: %w", err)
}
defer emos.Close()
if err = emos.UpdateEmojis(); err != nil {
return fmt.Errorf("failed to update emojis: %w", err)
}
fmt.Fprintln(os.Stderr, "updated local emojis")
emos.RefreshIndex()
fmt.Fprintln(os.Stderr, "updated emoji index")
return nil
}
func updatedNeeded() bool {
emos, err := newEmos()
defer emos.Close()
if err != nil {
return true
}
return emos.IsIndexEmpty()
}
func forkUpdate() {
cmd := exec.Command(os.Args[0], "-update")
cmd.Stderr = os.Stderr
cmd.Start()
}
func newEmos() (*emos.EmojiSearch, error) {
cfn := config.Loc(config.CacheFileName)
ifn := config.Loc(config.IndexFileName)
return emos.NewEmojiSearch(cfn, ifn)
}
type alfredResult struct {
Items []*alfredItem `json:"items"`
}
type alfredItem struct {
UID string `json:"uid"`
Title string `json:"title"`
Arg string `json:"arg"`
QuickLookURL string `json:"quicklookurl"`
Text struct {
Copy string `json:"copy"`
} `json:"text"`
Icon struct {
Type string `json:"type"`
Path string `json:"path"`
} `json:"icon"`
Mods struct {
Alt struct {
Valid bool `json:"valid"`
Arg string `json:"arg"`
Subtitle string `json:"subtitle"`
} `json:"alt"`
} `json:"mods"`
}
func newAlfredItem(title, url, path string) *alfredItem {
ai := new(alfredItem)
ai.Arg = url
ai.Title = title
ai.QuickLookURL = path
ai.Text.Copy = url
ai.Icon.Type = "filepath"
ai.Icon.Path = path
ai.Mods.Alt.Valid = true
ai.Mods.Alt.Arg = fmt.Sprintf("![](%s)", url)
ai.Mods.Alt.Subtitle = "markdown"
return ai
}
func runSearch(input string) error {
emos, err := newEmos()
if err != nil {
return fmt.Errorf("unable to start emoji search: %w", err)
}
defer emos.Close()
iter := emos.Search(input)
aiChan := prepareResults(iter)
alfredResult := alfredResult{Items: []*alfredItem{}}
for item := range aiChan {
alfredResult.Items = append(alfredResult.Items, item)
}
return json.NewEncoder(os.Stdout).Encode(alfredResult)
}
func prepareResults(iter *emos.SearchResultIter) <-chan *alfredItem {
aiChan := make(chan *alfredItem)
g, _ := errgroup.WithContext(context.Background())
workChan := make(chan *emos.Emoji)
// worker pool
for i := 0; i < workerCount; i++ {
g.Go(func() error {
for emoji := range workChan {
imgPath, err := downloadImage(emoji)
if err != nil {
return err
}
name := emoji.Title
aiChan <- newAlfredItem(name, emoji.Image, imgPath)
}
return nil
})
}
// send work to pool
go func() {
emoji, err := iter.Next()
for err == nil {
workChan <- emoji
emoji, err = iter.Next()
}
close(workChan)
}()
// close pool when done
go func() {
err := g.Wait()
if err != nil {
fmt.Fprintf(os.Stderr, "fetching items failed: %+v\n", err)
}
close(aiChan)
}()
return aiChan
}
func downloadImage(emoji *emos.Emoji) (string, error) {
cacheDir := getOrCreateCacheDir()
emojiPath := filepath.Join(cacheDir, emoji.Title)
emojiPath = fmt.Sprintf("%s.jpeg", emojiPath)
if _, err := os.Stat(emojiPath); err == nil {
return emojiPath, nil
}
resp, err := http.Get(emoji.Image)
if err != nil {
return "", fmt.Errorf("unable to download emoji image: %w", err)
}
defer resp.Body.Close()
err = writeImage(resp.Body, emojiPath)
if err != nil {
return "", fmt.Errorf("unable to write image to disk: %w", err)
}
return emojiPath, nil
}
func getOrCreateCacheDir() string {
imgCacheDir := config.Loc(config.ImageCacheDir)
if _, err := os.Stat(imgCacheDir); err != nil {
if os.IsNotExist(err) {
os.MkdirAll(imgCacheDir, 0755)
}
}
return imgCacheDir
}
func writeImage(src io.Reader, path string) error {
f, err := os.OpenFile(path, os.O_CREATE|os.O_WRONLY, 0755)
if err != nil {
return fmt.Errorf("unable to open file for writing: %w", err)
}
defer f.Close()
_, err = io.Copy(f, src)
if err != nil {
return fmt.Errorf("unable to write response to file: %w", err)
}
return nil
}