71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package app
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"os"
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)
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func LogString(str string) {
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if len(os.Getenv("LOG_FILE")) == 0 {
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return
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}
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f, err := os.OpenFile(os.Getenv("LOG_FILE"), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
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if err != nil {
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fmt.Println(err)
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}
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defer f.Close()
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if _, err := f.WriteString(str + "\n"); err != nil {
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fmt.Println(err)
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}
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}
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func LogContainsTransactionID(transactionID string) (bool, error) {
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if len(os.Getenv("LOG_FILE")) == 0 {
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return false, nil
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}
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// open the log file for reading.
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logFile, err := os.Open(os.Getenv("LOG_FILE"))
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if err != nil {
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return false, fmt.Errorf("error opening log file: %w", err)
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}
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defer logFile.Close()
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// create a new scanner to read the log file line by line.
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scanner := bufio.NewScanner(logFile)
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// iterate over each line of the log file.
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for scanner.Scan() {
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// unmarshal the JSON data from the current line.
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var transactionData struct {
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Data struct {
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StatementItem struct {
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ID string `json:"id"`
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} `json:"statementItem"`
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} `json:"data"`
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}
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err := json.Unmarshal(scanner.Bytes(), &transactionData)
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if err != nil {
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// skip lines that are not valid JSON.
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continue
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}
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// check if the transaction ID matches the given ID.
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if transactionData.Data.StatementItem.ID == transactionID {
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return true, nil
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}
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}
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// check for any errors that occurred during scanning.
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if err := scanner.Err(); err != nil {
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return false, fmt.Errorf("error scanning log file: %w", err)
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}
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// transaction ID not found in the log file.
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return false, nil
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}
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