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selftop.go
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selftop.go
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package main
import (
"fmt"
"nanomsg.org/go-mangos"
"nanomsg.org/go-mangos/protocol/sub"
"nanomsg.org/go-mangos/transport/tcp"
"github.com/mitchellh/go-homedir"
"os"
"strings"
"time"
"database/sql"
_ "github.com/mattn/go-sqlite3"
"encoding/json"
"golang.org/x/text/unicode/norm"
"golang.org/x/text/transform"
)
var sock mangos.Socket
type EventType uint
const (
MotionEvent EventType = 1 << iota
EnterEvent EventType = 1 << iota
KeyEvent EventType = 1 << iota
ClickEvent EventType = 1 << iota
UnknownEvent EventType = 1 << iota
)
type Window struct {
title string
class string
pid int64
process Process
}
type Process struct {
name string
cmdline string
}
type Event struct {
eventType EventType
window Window
time uint
timestamp int64
code uint8
}
type Counter struct {
motions uint
filteredMotions uint
clicks uint
scrolls uint
keys uint
time uint
start time.Time
end time.Time
}
type Message struct {
Event_type string
Xserver_time int64
Timestamp int64
Wm_name string
Wm_class string
Pid int64
Proc_name string
Proc_cmd string
Code uint8
}
var prevEvent Event
var counter Counter
// Map windows to ID in DB
var windows map[Window]int64
var procs map[Process]int64
var keys []Event
// DB
var db *sql.DB
var insertWindowCommand *sql.Stmt
var selectWindowCommand *sql.Stmt
var insertRecordCommand *sql.Stmt
var insertProcessCommand *sql.Stmt
var selectProcessCommand *sql.Stmt
var insertKeyCommand *sql.Stmt
var tx *sql.Tx
const idleTimeout = 300 * 1000 // milliseconds
func main() {
var err error
var msg []byte
createSocket()
bootstrapData()
for {
if msg, err = sock.Recv(); err != nil {
die("Cannot recv: %s", err.Error())
}
event := parseMessage(string(msg))
processEvent(event)
}
}
func createSocket() {
var err error
var url = "tcp://127.0.0.1:1234"
if sock, err = sub.NewSocket(); err != nil {
die("can't get new sub socket: %s", err.Error())
}
sock.AddTransport(tcp.NewTransport())
if err = sock.Dial(url); err != nil {
die("can't dial on sub socket: %s", err.Error())
}
// Empty byte array effectively subscribes to everything
err = sock.SetOption(mangos.OptionSubscribe, []byte(""))
if err != nil {
die("cannot subscribe: %s", err.Error())
}
}
func die(format string, v ...interface{}) {
fmt.Fprintln(os.Stderr, fmt.Sprintf(format, v...))
os.Exit(1)
}
func parseMessage(message string) (event Event) {
var parts = strings.Split(message, "\n")
var m Message
err := json.Unmarshal([]byte(parts[1]), &m)
if err != nil {
panic("parse error")
}
var eventType EventType
switch m.Event_type {
case "MotionEvent":
eventType = MotionEvent
case "EnterEvent":
eventType = EnterEvent
case "KeyEvent":
eventType = KeyEvent
case "ClickEvent":
eventType = ClickEvent
default:
eventType = UnknownEvent
}
window := Window {
title: m.Wm_name,
class: m.Wm_class,
pid: m.Pid,
process: Process {
name: m.Proc_name,
cmdline: m.Proc_cmd,
},
}
return Event {
eventType: eventType,
window: window,
time: uint(m.Xserver_time),
timestamp: m.Timestamp,
code: m.Code,
}
}
func processEvent(event Event) {
defer func(){prevEvent = event}()
var err error
processWindow(event.window)
if prevEvent.time == 0 {
counter.start = time.Unix(event.timestamp, 0)
return
}
delta := event.time - prevEvent.time
counter.time += delta
switch event.eventType {
case MotionEvent:
// filter mouse motions
counter.motions += 1
if prevEvent.eventType != MotionEvent || delta > 200 {
counter.filteredMotions += 1
}
case ClickEvent:
if event.code == 4 || event.code == 5 || event.code == 6 || event.code == 7 {
counter.scrolls += 1
} else {
counter.clicks += 1
}
case KeyEvent:
keys = append(keys, event)
counter.keys += 1
}
if prevEvent.window != event.window || (event.time - prevEvent.time) > idleTimeout {
if (event.time - prevEvent.time) > idleTimeout {
counter.end = time.Unix(prevEvent.timestamp, 0)
} else {
counter.end = time.Unix(event.timestamp, 0)
}
windowId := windows[prevEvent.window]
duration := counter.end.Sub(counter.start)
// Start new transaction
tx, err = db.Begin();
if err != nil {
panic("Could not start db transaction")
}
// store record
tx.Stmt(insertRecordCommand).Exec(
windowId,
counter.start.Format(time.RFC3339Nano),
counter.end.Format(time.RFC3339Nano),
duration / time.Millisecond,
counter.motions,
counter.filteredMotions,
counter.clicks,
counter.scrolls,
counter.keys,
prevEvent.window.pid)
// Store keys
txInsertKeyCommand := tx.Stmt(insertKeyCommand)
for i := 0; i < len(keys); i++ {
t := time.Unix(keys[i].timestamp, 0)
txInsertKeyCommand.Exec(windows[keys[i].window], keys[i].code, t.Format(time.RFC3339Nano))
}
// reset keys
keys = make([]Event, 0)
// reset counter
counter = Counter {
motions: 0,
filteredMotions: 0,
clicks: 0,
scrolls: 0,
keys: 0,
time: 0,
start: time.Unix(event.timestamp, 0),
}
// Commit transaction
tx.Commit()
}
// fmt.Printf("Window %s time %.3f sec motions: %d, clicks: %d, keys: %d\n", event.window.class, float32(counter.time)/1000, counter.motions, counter.clicks, counter.keys)
}
func processWindow(window Window) int64 {
// Process proc_name
if _, ok := procs[window.process]; !ok {
// try to find procs in db
var id int64
var processName = normalizeString(window.process.name)
var cmdline = normalizeString(window.process.cmdline)
err := selectProcessCommand.QueryRow(processName, cmdline).Scan(&id)
switch err {
case sql.ErrNoRows:
// store window to db
res, _ := insertProcessCommand.Exec(processName, cmdline)
id, _ = res.LastInsertId()
procs[window.process] = id
default:
procs[window.process] = id
}
}
proc_id := procs[window.process]
// Process window
if _, ok := windows[window]; !ok {
// try to find window in db
var id int64
err := selectWindowCommand.QueryRow(strings.TrimSpace(window.title), window.class, proc_id).Scan(&id)
switch err {
case sql.ErrNoRows:
// store window to db
res, _ := insertWindowCommand.Exec(strings.TrimSpace(window.title), window.class, proc_id)
id, _ = res.LastInsertId()
windows[window] = id
default:
windows[window] = id
}
}
return windows[window]
}
func bootstrapData() {
windows = make(map[Window]int64)
procs = make(map[Process]int64)
keys = make([]Event, 0)
var err error
// Determine path to db
homePath, err := homedir.Dir()
if err != nil {
panic("Could not get user's HOME path")
}
homePath, err = homedir.Expand(homePath)
if err != nil {
panic("Could not exepnd '~' in user's HOME path")
}
// Create .selftop directory
err = os.Mkdir(homePath + "/.selftop", 0775);
if err != nil && !os.IsExist(err) {
panic("Error: " + err.Error())
}
dbPath := homePath + "/.selftop/selftop.db"
fmt.Printf("DB path: %s\n", dbPath)
// Init db connection
db, err = sql.Open("sqlite3", dbPath)
if err != nil {
panic("Could not create db connection")
}
initDbSchema()
insertWindowCommand, err = db.Prepare(
"INSERT INTO window (title, class, process_id) VALUES (?,?, ?)")
if err != nil {
panic("Could not create prepared statement." + err.Error())
}
selectWindowCommand, err = db.Prepare(
"SELECT id FROM window WHERE title = ? AND class = ? AND process_id = ? LIMIT 1")
if err != nil {
panic("Could not create prepared statement." + err.Error())
}
selectProcessCommand, err = db.Prepare(
"SELECT id FROM process WHERE name = ? AND cmdline = ? LIMIT 1")
if err != nil {
panic("Could not create prepared statement." + err.Error())
}
insertProcessCommand, err = db.Prepare(
"INSERT INTO process (name, cmdline) VALUES (?, ?)")
if err != nil {
panic("Could not create prepared statement." + err.Error())
}
insertRecordCommand, err = db.Prepare(
"INSERT INTO record (window_id, start, end, duration, motions, motions_filtered, clicks, scrolls, keys, pid) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)")
if err != nil {
panic("Could not create prepared statement." + err.Error())
}
insertKeyCommand, err = db.Prepare(
"INSERT INTO keys (window_id, key, at) VALUES (?, ?, ?)")
if err != nil {
panic("Could not create prepared statement." + err.Error())
}
}
func initDbSchema() {
sql := `
CREATE TABLE IF NOT EXISTS window (
id INTEGER PRIMARY KEY AUTOINCREMENT,
process_id INTEGER,
title TEXT,
class TEXT,
created DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE IF NOT EXISTS process (
id INTEGER PRIMARY KEY AUTOINCREMENT,
name TEXT,
cmdline TEXT,
alias TEXT,
created DATETIME DEFAULT CURRENT_TIMESTAMP,
CONSTRAINT name_cmd UNIQUE (name, cmdline)
);
CREATE TABLE IF NOT EXISTS record (
id INTEGER PRIMARY KEY AUTOINCREMENT,
pid INTEGER NOT NULL,
window_id INTEGER NOT NULL,
start DATETIME NOT NULL,
end DATETIME NOT NULL,
duration INTEGER NOT NULL DEFAULT 0,
motions INTEGER NOT NULL DEFAULT 0,
motions_filtered INTEGER NOT NULL DEFAULT 0,
clicks INTEGER NOT NULL DEFAULT 0,
scrolls INTEGER NOT NULL DEFAULT 0,
keys INTEGER NOT NULL DEFAULT 0,
created DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE IF NOT EXISTS keys (
id INTEGER PRIMARY KEY AUTOINCREMENT,
window_id INTEGER NOT NULL,
key INTEGER DEFAULT 0,
at DATETIME NOT NULL,
created DATETIME DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE IF NOT EXISTS clicks (
id INTEGER PRIMARY KEY AUTOINCREMENT,
window_id INTEGER NOT NULL,
button INTEGER NOT NULL,
motions INTEGER DEFAULT 0,
motions_filtered INTEGER DEFAULT 0,
created DATETIME DEFAULT CURRENT_TIMESTAMP
);
`
_, err := db.Exec(sql)
if (err != nil) {
panic("Could not init database schema. " + err.Error());
}
}
func stripCtlAndExtFromUnicode(str string) string {
// The isOk filter is such that there is no need to chain to norm.NFC
t := transform.Chain(norm.NFC)
// This Transformer could also trivially be applied as an io.Reader
// or io.Writer filter to automatically do such filtering when reading
// or writing data anywhere.
str, _, _ = transform.String(t, str)
return str
}
func normalizeString(str string) string {
str = stripCtlAndExtFromUnicode(str)
str = strings.Trim(str, "\u0000")
str = strings.TrimSpace(str)
return str
}