The-DevOps-Daily/terraform-provider-validatefx

Add ISBN validator

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#450 opened on Nov 24, 2025

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enhancementgood first issuehacktoberfest

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 (21 stars)
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Description

Create a validator for ISBN-10 and ISBN-13 book identifiers.

Tasks:

  • Support both ISBN-10 and ISBN-13 formats
  • Validate check digits
  • Handle hyphens and spaces in input
  • Add comprehensive test coverage

Contributor guide

Research direction
Implement ISBN 10 and ISBN 13 validation logic including check digit calculation and sanitization of hyphens/spaces.
Tech stack
go
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Go
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75