chirpnest/rules.go

package main

import (
	"encoding/json"
	"errors"
	"log"
	"regexp"
)

func resetMsgParsingRules() error {
	var rules, rules2 []MessageParsingRule
	var count int64

	b, err := Asset("data/msg_rules.json")
	logOnError(err, "resetMsgParsingRules : load data/msg_rules.json")
	if err != nil {
		return err
	}

	err = json.Unmarshal(b, &rules)

	r := MessageParsingRule{
		Priority:       1,
		Description:    "Default Main chat",
		Rule:           "(?s:.*)",
		MsgTypeID64:    cacheObjSubType[`msg_guild_main`],
		ChatID64:       cfg.Bot.Mainchat,
		SenderUserID64: 0,
	}
	rules2 = append(rules2, r)

	r = MessageParsingRule{
		Priority:       1,
		Description:    "Default Deposit chat",
		Rule:           "(?s:.*)",
		MsgTypeID64:    cacheObjSubType[`msg_guild_deposit`],
		ChatID64:       cfg.Bot.Depositchat,
		SenderUserID64: 0,
	}
	rules2 = append(rules2, r)

	for _, r := range rules {
		r2 := MessageParsingRule{
			Priority:       r.Priority,
			Description:    r.Description,
			Rule:           r.Rule,
			MsgType:        r.MsgType,
			ChatID64:       r.ChatID64,
			SenderUserID64: r.SenderUserID64,
		}

		r2.MsgTypeID64, err = codeObjSubTypeId(r2.MsgType)
		logOnError(err, "resetMsgParsingRules : codeObjSubTypeId("+r2.MsgType+")")
		if err != nil {
			return err
		}

		r2.re, err = regexp.Compile(r2.Rule)
		logOnError(err, "resetMsgParsingRules : Compile("+r.Rule+")")
		if err != nil {
			return err
		}

		rules2 = append(rules2, r2)
	}

	_, err = db.Exec(`TRUNCATE TABLE msg_rules;`)
	logOnError(err, "resetMsgParsingRules : truncate table msg_rules")
	if err != nil {
		return err
	}

	stmt, err := db.Prepare(`INSERT INTO msg_rules (prio, msg_type_id, chat_id, user_id, descn, rule)
						         VALUES			   (?,    ?,           ?,       ?,         ?,     ?);`)
	logOnError(err, "resetMsgParsingRules : prepare statement")
	if err != nil {
		return err
	}
	defer stmt.Close()
	count = 0
	for _, r2 := range rules2 {

		_, err = stmt.Exec(r2.Priority, r2.MsgTypeID64, r2.ChatID64, r2.SenderUserID64, r2.Description, r2.Rule)
		logOnError(err, "resetMsgParsingRules : insert statement "+r2.Description)
		if err != nil {
			return err
		}
		count += 1

	}

	log.Printf("%d rules inserted.\n", count)

	return nil

}

func loadMsgParsingRules() (m map[int]MessageParsingRule, err error) {
	var (
		id          int32
		priority    int32
		descn       string
		rule        string
		msgTypeID64 int64
		chatID64    int64
		userID64    int64
	)

	log.Println("Loading message parsing rules...")
	m = make(map[int]MessageParsingRule)
	count := int(0)

	defer func() {
		if rec := recover(); rec != nil {
			log.Println("Error parsing rules : ", rec)
			err = errors.New("panic")
		}
	}()

	rules, err := db.Query(`SELECT r.id, r.prio, r.descn, r.rule, r.msg_type_id, r.chat_id, r.user_id FROM msg_rules r ORDER BY r.prio DESC;`)
	if err != nil {
		return m, err
	}
	defer rules.Close()

	for rules.Next() {
		err = rules.Scan(&id, &priority, &descn, &rule, &msgTypeID64, &chatID64, &userID64)
		if err != nil {
			return m, err
		}
		i := new(MessageParsingRule)
		i.ID = id
		i.Priority = priority
		i.Description = descn
		i.Rule = rule
		i.MsgTypeID64 = msgTypeID64
		i.ChatID64 = chatID64
		i.SenderUserID64 = userID64
		i.re = regexp.MustCompile(rule)
		m[count] = *i
		//		log.Printf("New rule : %s\n", rule)
		count++
	}

	return m, nil
}