/
addresses.go
165 lines (152 loc) · 3.24 KB
/
addresses.go
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package notmuch_addresses
import (
"code.google.com/p/go-sqlite/go1/sqlite3"
"errors"
"fmt"
"io"
"log"
"net/mail"
"os"
)
var (
headers = [...]string{
"To",
"Cc",
"CC",
"Bcc",
"BCC",
"From",
}
)
var (
conn *sqlite3.Conn
)
func InitDatabase(path string) error {
c, err := sqlite3.Open(path)
if err != nil {
return err
}
conn = c
conn.Exec(`CREATE TABLE IF NOT EXISTS address (
address TEXT,
raw TEXT,
count INTEGER
);`)
return nil
}
func Close() (err error) {
err = conn.Close()
conn = nil
return
}
var ErrDatabaseNotOpen = errors.New("Database is not open")
//func GatherAddresses(path string) (addresses []*mail.Address, err error) {
func GatherAddresses(path string) (addresses int, err error) {
if conn == nil {
return 0, ErrDatabaseNotOpen
}
file, err := os.Open(path)
if err != nil {
return
}
msg, err := mail.ReadMessage(file)
if err != nil {
return
}
for _, header := range headers {
tmp_addresses, err := msg.Header.AddressList(header)
if err == nil {
for _, address := range tmp_addresses {
//addresses = append(addresses, tmp_addresses...)
for {
var save bool
conn.Begin()
old_affected := conn.TotalRowsAffected()
err = conn.Exec(`UPDATE address
SET count = count + 1
WHERE raw = ?`,
address.String())
if err != nil {
// Can't save this email address.
// It wasn't because of a failed transaction.
log.Print("Couldn't increment or save address", address, err)
break
}
if conn.TotalRowsAffected() == old_affected {
err = conn.Exec(`INSERT INTO address (address, raw, count) VALUES (?,?,1);`,
address.Address,
address.String())
if err != nil {
log.Print("Couldn't save address", address, err)
break
}
save = true
} else {
save = false
}
if conn.Commit() == nil {
if save {
log.Print("Saved new address ", address)
} else {
log.Print("Incremented address ", address)
}
break
} else {
log.Print("Couldn't commit transaction. Retrying.")
}
}
}
addresses += 1
}
}
return
}
func QueryToStdout(substring string) error {
ch, cherr := QueryToChannel(substring)
for {
select {
case raw, ok := <-ch:
if !ok {
return nil
}
fmt.Println(raw)
case err, ok := <-cherr:
if ok {
log.Println("Error querying addresses:", err)
return err
}
}
}
}
func QueryToChannel(substring string) (ch chan string, cherr chan error) {
ch = make(chan string)
cherr = make(chan error)
go func() {
defer close(cherr)
defer close(ch)
if conn == nil {
cherr <- ErrDatabaseNotOpen
return
}
stmt, err := conn.Query(`SELECT raw FROM address WHERE raw LIKE ? GROUP BY address ORDER BY count;`, "%"+substring+"%")
if err != nil {
if err == io.EOF {
return
}
cherr <- err
return
}
for ; err == nil; err = stmt.Next() {
var raw string
if errb := stmt.Scan(&raw); errb != nil {
cherr <- errb
} else {
ch <- raw
}
}
if err == io.EOF {
return
}
}()
return
}