{"id":18485469,"url":"https://github.com/system76/state_fair","last_synced_at":"2025-10-14T13:32:19.668Z","repository":{"id":72817659,"uuid":"45072975","full_name":"system76/state_fair","owner":"system76","description":"State machine system for Elixir applications","archived":false,"fork":false,"pushed_at":"2015-10-27T22:07:32.000Z","size":112,"stargazers_count":4,"open_issues_count":0,"forks_count":2,"subscribers_count":3,"default_branch":"master","last_synced_at":"2025-05-25T11:03:54.700Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Elixir","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/system76.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.md","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2015-10-27T22:06:45.000Z","updated_at":"2023-09-01T12:10:50.000Z","dependencies_parsed_at":"2023-03-11T14:05:06.285Z","dependency_job_id":null,"html_url":"https://github.com/system76/state_fair","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/system76/state_fair","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/system76%2Fstate_fair","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/system76%2Fstate_fair/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/system76%2Fstate_fair/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/system76%2Fstate_fair/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/system76","download_url":"https://codeload.github.com/system76/state_fair/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/system76%2Fstate_fair/sbom","scorecard":null,"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":279018715,"owners_count":26086609,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","status":"online","status_checked_at":"2025-10-14T02:00:06.444Z","response_time":60,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-06T12:45:21.349Z","updated_at":"2025-10-14T13:32:19.630Z","avatar_url":"https://github.com/system76.png","language":"Elixir","funding_links":[],"categories":[],"sub_categories":[],"readme":"# StateFair\n\nInspired by the[`state_machine` ruby gem](https://github.com/pluginaweek/state_machine),\nthis\n\n## Installation\n\nThe package can be installed as:\n\n  1. Add state_fair to your list of dependencies in `mix.exs`:\n\n        def deps do\n          [{:state_fair, \"~\u003e 0.1\"}]\n        end\n\n## Overview\n\n```elixir\ndefmodule Order do\n  import StateFair\n\n  defstruct status: :new\n\n  state_manager :status do\n    event :purchase do\n      transition from: :new, to: :ordered\n    end\n\n    event :ship do\n      transition from: :ordered, to: :shipped\n    end\n\n    event :cancel do\n      transition from: [:new, :ordered], to: :cancelled\n    end\n\n    event :force_cancel do\n      transition from: {:any}, to: :cancelled\n    end\n  end\nend\n\norder = %Order{status: :new}\n\n{:ok, order} = order |\u003e Order.purchase # =\u003e order.status == :ordered\n\nif order |\u003e Order.can_ship? do\n  order = order |\u003e Order.ship! # =\u003e order.status == :shipped\nend\n\norder |\u003e Order.cancel # =\u003e :error\norder |\u003e Order.cancel! # throws StateFair.InvalidTransitionError\norder |\u003e Order.force_cancel! # =\u003e order.status == :cancelled\n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsystem76%2Fstate_fair","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsystem76%2Fstate_fair","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsystem76%2Fstate_fair/lists"}