Add duplicate transaction check from log and transaction description LIKE match

app/import_transaction.go

@@ -12,6 +12,7 @@ import (
 	"os"
 	"slices"
 	"strconv"
+	"strings"
 	"time"
 )
 
@@ -28,6 +29,15 @@ func ImportTransaction(monobankTransaction monobank.WebHookResponse) error {
 		return err
 	}
 
+	// check if transaction hs been logged
+	isTransactionAlreadyLogged, err := LogContainsTransactionID(monobankTransaction.Data.StatementItem.Id)
+	if err != nil {
+		return err
+	}
+	if isTransactionAlreadyLogged {
+		return nil
+	}
+
 	// find accounts
 	destAccount := App().Config.GetAccountByMonobankId(monobankTransaction.Data.Account)
 
@@ -92,8 +102,21 @@ func ImportTransaction(monobankTransaction monobank.WebHookResponse) error {
 			}
 			break
 		} else {
+			// check name match
+			isDescriptionMatch := false
+			if row.NamesLooseMatch {
+				for _, name := range row.Names {
+					if strings.HasPrefix(monobankTransaction.Data.StatementItem.Description, name) {
+						isDescriptionMatch = true
+						break
+					}
+				}
+			} else {
+				isDescriptionMatch = slices.Contains(row.Names, monobankTransaction.Data.StatementItem.Description)
+			}
+
 			// check name & mcc
-			if !(slices.Contains(row.Names, monobankTransaction.Data.StatementItem.Description) || slices.Contains(row.MccCodes, int(monobankTransaction.Data.StatementItem.Mcc))) {
+			if !(isDescriptionMatch || slices.Contains(row.MccCodes, int(monobankTransaction.Data.StatementItem.Mcc))) {
 				continue
 			}
 

app/logger.go

@@ -1,6 +1,8 @@
 package app
 
 import (
+	"bufio"
+	"encoding/json"
 	"fmt"
 	"os"
 )
@@ -20,3 +22,49 @@ func LogString(str string) {
 		fmt.Println(err)
 	}
 }
+
+func LogContainsTransactionID(transactionID string) (bool, error) {
+	if len(os.Getenv("LOG_FILE")) == 0 {
+		return false, nil
+	}
+
+	// open the log file for reading.
+	logFile, err := os.Open(os.Getenv("LOG_FILE"))
+	if err != nil {
+		return false, fmt.Errorf("error opening log file: %w", err)
+	}
+	defer logFile.Close()
+
+	// create a new scanner to read the log file line by line.
+	scanner := bufio.NewScanner(logFile)
+
+	// iterate over each line of the log file.
+	for scanner.Scan() {
+		// unmarshal the JSON data from the current line.
+		var transactionData struct {
+			Data struct {
+				StatementItem struct {
+					ID string `json:"id"`
+				} `json:"statementItem"`
+			} `json:"data"`
+		}
+		err := json.Unmarshal(scanner.Bytes(), &transactionData)
+		if err != nil {
+			// skip lines that are not valid JSON.
+			continue
+		}
+
+		// check if the transaction ID matches the given ID.
+		if transactionData.Data.StatementItem.ID == transactionID {
+			return true, nil
+		}
+	}
+
+	// check for any errors that occurred during scanning.
+	if err := scanner.Err(); err != nil {
+		return false, fmt.Errorf("error scanning log file: %w", err)
+	}
+
+	// transaction ID not found in the log file.
+	return false, nil
+}

config/config.go

@@ -1,25 +1,26 @@
 package config
 
 type Config struct {
-	Accounts         []ConfigAccount          `json:"accounts"`
-	TransactionTypes []ConfigTransactionTypes `json:"transaction_types"`
+	Accounts         []Account          `json:"accounts"`
+	TransactionTypes []TransactionTypes `json:"transaction_types"`
 }
 
-type ConfigAccount struct {
+type Account struct {
 	Firefly3Name string `json:"firefly3_name,omitempty"`
 	MonobankId   string `json:"monobank_id,omitempty"`
 	Currency     string `json:"currency,omitempty"`
 }
 
-type ConfigTransactionTypes struct {
-	Names       []string                      `json:"names,omitempty"`
-	NamesRefund []string                      `json:"names_refund,omitempty"`
-	MccCodes    []int                         `json:"mcc_codes,omitempty"`
-	Firefly3    ConfigTransactionTypeFirefly3 `json:"firefly3,omitempty"`
-	SumMax      int                           `json:"sum_max,omitempty"`
+type TransactionTypes struct {
+	Names           []string                `json:"names,omitempty"`
+	NamesRefund     []string                `json:"names_refund,omitempty"`
+	NamesLooseMatch bool                    `json:"names_loose_match,omitempty"` // "name%" match
+	MccCodes        []int                   `json:"mcc_codes,omitempty"`
+	Firefly3        TransactionTypeFirefly3 `json:"firefly3,omitempty"`
+	SumMax          int                     `json:"sum_max,omitempty"`
 }
 
-type ConfigTransactionTypeFirefly3 struct {
+type TransactionTypeFirefly3 struct {
 	Type                     string `json:"type,omitempty"`
 	Destination              string `json:"destination,omitempty"`
 	Description              string `json:"description,omitempty"`

config/helpers.go

@@ -1,21 +1,21 @@
 package config
 
-func (c *Config) GetAccountByMonobankId(q string) ConfigAccount {
+func (c *Config) GetAccountByMonobankId(q string) Account {
 	for _, row := range c.Accounts {
 		if row.MonobankId == q {
 			return row
 		}
 	}
 
-	return ConfigAccount{}
+	return Account{}
 }
 
-func (c *Config) GetAccountByFirefly3Name(q string) ConfigAccount {
+func (c *Config) GetAccountByFirefly3Name(q string) Account {
 	for _, row := range c.Accounts {
 		if row.Firefly3Name == q {
 			return row
 		}
 	}
 
-	return ConfigAccount{}
+	return Account{}
 }

go.mod

@@ -10,5 +10,6 @@ require (
 )
 
 require (
+	github.com/sanity-io/litter v1.5.5 // indirect
 	golang.org/x/oauth2 v0.22.0 // indirect
 )