frantic-core

frantic-core is a Go utility library and application toolkit.

It includes a large set of helper packages for banking, dates, logging, configuration, financial calculations, and more.

Package Documentation

Package	Description
application	OS/platform detection and system identity
banking	IBAN, ISIN, LEI, UTI validation and GLEIF API lookup
chiMiddleware	Chi router middleware (Brotli, minify, method conversion, context injection)
colours	ANSI colour escape sequences for terminal styling
commonConfig	TOML-based application configuration
commonErrors	Shared sentinel errors and wrapping helpers
contextHandler	Request-scoped context and session management
dateHelpers	Date formatting, parsing, arithmetic, and business-day logic
dockerHelpers	Docker environment detection and payload deployment
emailHandler	Email composition and SMTP sending
financial	Tenor calculations, settlement dates, and amount formatting
frantic	Project identity utilities and validation
htmlHelpers	HTML value conversion and URL-safe encoding
idHelpers	ID generation (KSUID), hashing, and composite IDs
ioHelpers	File I/O, copy, backup, and directory management
logHandler	Multi-channel logging with file rotation
mathHelpers	Random numbers, min/max, coin toss
messageHelpers	Inter-service message types (user, session, authority, translation)
mockData	Mock reference datasets for testing (countries, currencies, etc.)
netHandler	Network host reachability checking
notificationHandler	Push notifications via Pushover
paths	Filesystem path helpers and directory structure
stringHelpers	String formatting, quoting, encoding, and manipulation
timeHelpers	Timezone inference from locale
timing	Stopwatch timing and snooze utilities
tuiInputHelper	Terminal UI input prompts

Features

• Banking utilities (IBAN, ISIN, LEI, UTI validation and formatting)
• GLEIF API integration for LEI lookups
• Color terminal output
• Centralized TOML-based configuration management
• Common error handling with sentinel errors and wrappers
• Context and session helpers with worker pool support
• Date and time utilities with business-day awareness
• Docker environment detection
• Email sending via SMTP
• Financial calculations (tenors, settlement dates, rate ladders, amount formatting)
• Project identity validation
• HTML value helpers and URL-safe encoding
• ID generation (KSUID), hashing (SHA3-256), and composite IDs
• File I/O, backup, and directory management
• Multi-channel logging with file rotation (lumberjack)
• Math helpers (random, min/max)
• Inter-service messaging types
• Mock reference data (countries, currencies, genders, titles, rate ladders)
• Network host reachability checks
• Push notifications (Pushover)
• Filesystem path management
• String manipulation and formatting
• Timezone inference
• Stopwatch timing and sleep utilities
• Terminal UI input helpers
• Chi router middleware (Brotli, HTML minification, HTTP method conversion)

Directory Structure

application/         # OS/platform detection and system identity
banking/             # Financial identifier validation (IBAN, ISIN, LEI, UTI)
chiMiddleware/       # Chi router middleware
colours/             # ANSI colour escape sequences
commonConfig/        # TOML-based configuration management
commonErrors/        # Shared sentinel errors and wrappers
contextHandler/      # Context and session management
dateHelpers/         # Date utilities and business-day logic
dockerHelpers/       # Docker environment support
emailHandler/        # Email sending via SMTP
financial/           # Financial calculations and tenor logic
frantic/             # Project identity utilities
htmlHelpers/         # HTML value helpers and URL encoding
idHelpers/           # ID generation and hashing
ioHelpers/           # File I/O and directory management
logHandler/          # Multi-channel logging with rotation
mathHelpers/         # Numeric helpers
messageHelpers/      # Inter-service message types
mockData/            # Mock reference datasets
netHandler/          # Network reachability checking
notificationHandler/ # Push notifications (Pushover)
paths/               # Filesystem path helpers
stringHelpers/       # String manipulation
timeHelpers/         # Timezone inference
timing/              # Stopwatch and snooze utilities
tuiInputHelper/      # Terminal UI input helpers

Installation

To use frantic-core in your Go project:

go get github.com/mt1976/frantic-core

Usage

Import the package or specific modules as needed:

import (
    "github.com/mt1976/frantic-core/banking"
    "github.com/mt1976/frantic-core/dateHelpers"
    "github.com/mt1976/frantic-core/logHandler"
    // ...other imports as needed
)

Example: Validate an IBAN

package main

import (
    "fmt"
    "github.com/mt1976/frantic-core/banking"
)

func main() {
    iban, err := banking.NewIBAN("GB82WEST12345698765432")
    if err != nil {
        fmt.Println("Invalid IBAN:", err)
        return
    }
    fmt.Println("IBAN:", iban.String())
}

Example: Logging

import "github.com/mt1976/frantic-core/logHandler"

func main() {
    logHandler.Info.Println("Application started")
}

Example: Date Helper

import (
    "fmt"
    "github.com/mt1976/frantic-core/dateHelpers"
)

func main() {
    today := dateHelpers.Today()
    fmt.Println("Today:", dateHelpers.FormatHuman(today))
    fmt.Println("Is working day:", dateHelpers.IsWorkingDay(today))
}

License

This project is licensed under the MIT License. See the LICENSE file for details.