/
console.go
289 lines (246 loc) · 6.54 KB
/
console.go
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package database
import (
"bufio"
"fmt"
"io/ioutil"
"log"
"os"
"rs3/security"
"runtime/pprof"
"strings"
)
type tokens []string
func (t tokens) expect(words ...string) bool {
l := len(t)
if l >= len(words) {
return false
}
fmt.Printf("Error: expected tokens:\n\t%v\nbut only received:\n\t%v\n", words, t)
return true
}
func Console() {
scanner := bufio.NewScanner(os.Stdin)
fmt.Print(">>> ")
for scanner.Scan() {
tokens := tokens(strings.Split(scanner.Text(), " "))
if len(tokens) == 0 {
continue
}
switch {
// Quit.
case tokens[0] == "exit":
panic("")
// Add user.
case tokens[0] == "add":
if tokens.expect("add", "[user|feed|feeds]") {
continue
}
switch tokens[1] {
case "user":
if tokens.expect("add", "user", "[username]", "[password]", "[nickname]") {
continue
}
username := tokens[2]
password := tokens[3]
nickname := tokens[4]
salt := security.NewSalt()
uid, err := security.Hash(username, salt)
if err != nil {
fmt.Fprintln(os.Stderr, "Error: failed to hash username.")
}
pwd, err := security.Hash(password, salt)
if err != nil {
fmt.Fprintln(os.Stderr, "Error: failed to hash username.")
}
err = AddUser(uid, pwd, salt, nickname, username)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
case "feed":
if tokens.expect("add", "feed", "[uid]", "[cookie]", "[url]") {
continue
}
uid, err := StringToUid(tokens[2])
if err != nil {
fmt.Println("Error parsing uid:")
fmt.Println(err)
}
cookie := tokens[3]
feed := tokens[4]
err = AddFeeds(uid, cookie, feed)
if err != nil {
fmt.Println("Error adding feed:")
fmt.Println(err)
}
fmt.Printf("Added feed %q.\n", feed)
case "feeds":
if tokens.expect("add", "feeds", "[uid]", "[cookie]", "[url...]") {
continue
}
uid, err := StringToUid(tokens[2])
if err != nil {
fmt.Println("Error parsing uid:")
fmt.Println(err)
}
cookie := tokens[3]
for _, feed := range tokens[4:] {
err = AddFeeds(uid, cookie, feed)
if err != nil {
fmt.Println("Error adding feed:")
fmt.Println(err)
}
fmt.Printf("Added feed %q.\n", feed)
}
}
// Remove user.
case tokens[0] == "remove":
if tokens.expect("remove", "[username]") {
continue
}
username := tokens[1]
salt := Salt(username)
uid, err := security.Hash(username, salt)
if err != nil {
fmt.Fprintln(os.Stderr, "Error: failed to hash username.")
}
err = DeleteUser(uid)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
// Check a user's feeds.
case tokens[0] == "feeds":
if tokens.expect("feeds", "[uid]") {
continue
}
uid := tokens[1]
user, ok := db.Users[uid]
if ok {
sum := 0
for _, feed := range user.Feeds {
fmt.Println(feed)
sum += int(feed.Unread)
}
fmt.Printf("\n\nTotal feeds: %3d\nUnread items: %3d\n", len(user.Feeds), sum)
} else {
fmt.Println("Error: could not find user.")
}
// Reset a user's feeds.
case tokens[0] == "reset":
if tokens.expect("reset", "[uid]") {
continue
}
uid, err := StringToUid(tokens[1])
if err != nil {
fmt.Println("Failed to parse uid:")
fmt.Println(err)
}
err = ResetUserFeeds(uid)
if err != nil {
fmt.Println("Failed to reset feeds:")
fmt.Println(err)
}
// Update a user's feeds.
case tokens[0] == "update":
if tokens.expect("update", "[uid]") {
continue
}
uid := tokens[1]
user, ok := db.Users[uid]
if ok {
for _, feed := range user.Feeds {
start := feed.Unread
err := feed.Update()
if err != nil {
fmt.Printf("Error while updating feed %q:\n", feed.Title)
fmt.Println(err)
}
if feed.Unread-start > 0 {
fmt.Printf("%d new items for feed %q.\n", feed.Unread-start, feed.Title)
}
}
} else {
fmt.Println("Error: could not find user.")
}
// Debug.
case tokens[0] == "debug":
if tokens.expect("debug") {
continue
}
fmt.Println(string(Debug()))
// Serialise.
case tokens[0] == "serialise":
if tokens.expect("serialise [optional path]") {
continue
}
data, err := ioutil.ReadAll(Reader())
if err != nil {
fmt.Println("Error serialising database:")
fmt.Println(err)
} else {
if len(tokens) > 1 {
err = ioutil.WriteFile(tokens[1], data, 0644)
if err != nil {
fmt.Println("Error writing database to disk:")
fmt.Println(err)
}
} else {
fmt.Println(string(data))
}
}
// Stack trace.
case tokens[0] == "stacktrace":
if tokens.expect("stacktrace") {
continue
}
target := tokens[1]
f, err := os.Create(target)
if err != nil {
fmt.Fprintln(os.Stderr, "Error: failed to open target filepath.")
}
w := bufio.NewWriter(f)
err = pprof.Lookup("goroutine").WriteTo(w, 0)
if err != nil {
fmt.Fprintln(os.Stderr, "Error: failed to write stacktrace.")
}
// Backup database.
case tokens[0] == "backup":
if tokens.expect("backup", "[path]") {
continue
}
target := tokens[1]
err := Backup(target)
if err != nil {
fmt.Println("Backup error: ", err)
}
// Restore database.
case tokens[0] == "restore":
if tokens.expect("restore", "[path]") {
continue
}
origin := tokens[1]
err := Restore(origin)
if err != nil {
fmt.Println("Restore error: ", err)
}
// Cache content file.
case tokens[0] == "cache":
if tokens.expect("cache", "[resource]") {
continue
}
target := tokens[1]
err := Cache(target)
if err != nil {
fmt.Fprintln(os.Stderr, err.Error())
}
default:
fmt.Println("Error: command not understood.")
}
fmt.Print(">>> ")
}
if err := scanner.Err(); err != nil {
log.Panic(os.Stderr, "reading standard input:", err)
}
}
func Cache(s string) error {
return nil
}