antanst
bfaa857fae
- Update common package utilities - Refactor network code for better error handling - Remove deprecated files and functionality - Enhance blacklist and filtering capabilities - Improve snapshot handling and processing
63 lines
1.7 KiB
Go
63 lines
1.7 KiB
Go
package util
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import (
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"crypto/rand"
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"encoding/json"
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"fmt"
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"math/big"
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"regexp"
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)
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// SecureRandomInt returns a cryptographically secure random integer in the range [0,max).
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// Panics if max <= 0 or if there's an error reading from the system's secure
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// random number generator.
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func SecureRandomInt(max int) int {
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// Convert max to *big.Int for crypto/rand operations
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maxBig := big.NewInt(int64(max))
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// Generate random number
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n, err := rand.Int(rand.Reader, maxBig)
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if err != nil {
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panic(fmt.Errorf("could not generate a random integer between 0 and %d", max))
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}
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// Convert back to int
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return int(n.Int64())
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}
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func PrettifyJson(data string) string {
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marshalled, _ := json.MarshalIndent(data, "", " ")
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return fmt.Sprintf("%s\n", marshalled)
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}
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// GetLinesMatchingRegex returns all lines that match given regex
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func GetLinesMatchingRegex(input string, pattern string) []string {
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re := regexp.MustCompile(pattern)
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matches := re.FindAllString(input, -1)
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return matches
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}
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// Filter applies a predicate function to each element in a slice and returns a new slice
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// containing only the elements for which the predicate returns true.
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// Type parameter T allows this function to work with slices of any type.
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func Filter[T any](slice []T, f func(T) bool) []T {
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filtered := make([]T, 0)
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for _, v := range slice {
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if f(v) {
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filtered = append(filtered, v)
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}
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}
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return filtered
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}
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// Map applies a function to each element in a slice and returns a new slice
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// containing the results.
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// Type parameters T and R allow this function to work with different input and output types.
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func Map[T any, R any](slice []T, f func(T) R) []R {
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result := make([]R, len(slice))
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for i, v := range slice {
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result[i] = f(v)
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}
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return result
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}
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