From 20df184279f1bb2dc1c24baab677e5afbb39b4b3 Mon Sep 17 00:00:00 2001 From: Alexander Heldt Date: Sat, 1 Nov 2025 14:00:02 +0100 Subject: [PATCH] log-levels --- log-levels/.exercism/config.json | 24 ++++++ log-levels/.exercism/metadata.json | 1 + log-levels/.gitignore | 4 + log-levels/HELP.md | 32 ++++++++ log-levels/HINTS.md | 22 ++++++ log-levels/README.md | 108 ++++++++++++++++++++++++++ log-levels/gleam.toml | 14 ++++ log-levels/manifest.toml | 31 ++++++++ log-levels/src/log_levels.gleam | 28 +++++++ log-levels/test/log_levels_test.gleam | 62 +++++++++++++++ 10 files changed, 326 insertions(+) create mode 100644 log-levels/.exercism/config.json create mode 100644 log-levels/.exercism/metadata.json create mode 100644 log-levels/.gitignore create mode 100644 log-levels/HELP.md create mode 100644 log-levels/HINTS.md create mode 100644 log-levels/README.md create mode 100644 log-levels/gleam.toml create mode 100644 log-levels/manifest.toml create mode 100644 log-levels/src/log_levels.gleam create mode 100644 log-levels/test/log_levels_test.gleam diff --git a/log-levels/.exercism/config.json b/log-levels/.exercism/config.json new file mode 100644 index 0000000..4f513f9 --- /dev/null +++ b/log-levels/.exercism/config.json @@ -0,0 +1,24 @@ +{ + "authors": [ + "lpil" + ], + "files": { + "solution": [ + "src/log_levels.gleam" + ], + "test": [ + "test/log_levels_test.gleam" + ], + "exemplar": [ + ".meta/example.gleam" + ], + "invalidator": [ + "gleam.toml", + "manifest.toml" + ] + }, + "forked_from": [ + "elixir/log-levels" + ], + "blurb": "Learn about strings by parsing application logs" +} diff --git a/log-levels/.exercism/metadata.json b/log-levels/.exercism/metadata.json new file mode 100644 index 0000000..f7494a3 --- /dev/null +++ b/log-levels/.exercism/metadata.json @@ -0,0 +1 @@ +{"track":"gleam","exercise":"log-levels","id":"d2fb58bff26843ac85c262169ce0cc3b","url":"https://exercism.org/tracks/gleam/exercises/log-levels","handle":"fw353qwgs","is_requester":true,"auto_approve":false} \ No newline at end of file diff --git a/log-levels/.gitignore b/log-levels/.gitignore new file mode 100644 index 0000000..170cca9 --- /dev/null +++ b/log-levels/.gitignore @@ -0,0 +1,4 @@ +*.beam +*.ez +build +erl_crash.dump diff --git a/log-levels/HELP.md b/log-levels/HELP.md new file mode 100644 index 0000000..1a0c0cb --- /dev/null +++ b/log-levels/HELP.md @@ -0,0 +1,32 @@ +# Help + +## Running the tests + +To run the tests, run the command `gleam test` from within the exercise directory. + +## Submitting your solution + +You can submit your solution using the `exercism submit src/log_levels.gleam` command. +This command will upload your solution to the Exercism website and print the solution page's URL. + +It's possible to submit an incomplete solution which allows you to: + +- See how others have completed the exercise +- Request help from a mentor + +## Need to get help? + +If you'd like help solving the exercise, check the following pages: + +- The [Gleam track's documentation](https://exercism.org/docs/tracks/gleam) +- The [Gleam track's programming category on the forum](https://forum.exercism.org/c/programming/gleam) +- [Exercism's programming category on the forum](https://forum.exercism.org/c/programming/5) +- The [Frequently Asked Questions](https://exercism.org/docs/using/faqs) + +Should those resources not suffice, you could submit your (incomplete) solution to request mentoring. + +To get help if you're having trouble, you can use one of the following resources: + +- [gleam.run](https://gleam.run/documentation/) is the gleam official documentation. +- [Discord](https://discord.gg/Fm8Pwmy) is the discord channel. +- [StackOverflow](https://stackoverflow.com/questions/tagged/gleam) can be used to search for your problem and see if it has been answered already. You can also ask and answer questions. \ No newline at end of file diff --git a/log-levels/HINTS.md b/log-levels/HINTS.md new file mode 100644 index 0000000..c8538a6 --- /dev/null +++ b/log-levels/HINTS.md @@ -0,0 +1,22 @@ +# Hints + +## General + +- The `gleam/string` module has many useful [string functions][stdlib]. + +## 1. Get message from a log line + +- The `<>` operator can be used in pattern matching to match the beginning of a string. +- The `gleam/string` module has a [function][trim] to remove surrounding whitespace from a string. + +## 2. Get log level from a log line + +- The `gleam/string` module has a [function][lowercase] to convert a string to lowercase. + +## 3. Reformat a log line + +- The `<>` operator can be used to join strings together. + +[stdlib]: https://hexdocs.pm/gleam_stdlib/gleam/string.html +[trim]: https://hexdocs.pm/gleam_stdlib/gleam/string.html#trim +[lowercase]: https://hexdocs.pm/gleam_stdlib/gleam/string.html#lowercase \ No newline at end of file diff --git a/log-levels/README.md b/log-levels/README.md new file mode 100644 index 0000000..4617f96 --- /dev/null +++ b/log-levels/README.md @@ -0,0 +1,108 @@ +# Log Levels + +Welcome to Log Levels on Exercism's Gleam Track. +If you need help running the tests or submitting your code, check out `HELP.md`. +If you get stuck on the exercise, check out `HINTS.md`, but try and solve it without using those first :) + +## Introduction + +## Strings + +Strings in Gleam are immutable text surrounded by double quotes. They support unicode characters, and can be multi-line. + +```gleam +let greeting = "Hello, Joe! 📞" + +let multi_line_string = "one +two +three" +``` + +Strings can be joined together using the `<>` operator: + +```gleam +let name = "Mike" +"Hello, " <> name <> "!" +// -> "Hello, Mike!" +``` + +The [`gleam/string`][stdlib] module in the standard library provides functions for working with strings. + +Strings can be matched upon in case expressions: + +```gleam +pub fn on_an_excellent_adventure(name: String) -> Bool { + case name { + "Bill" -> True + "Ted" -> True + _ -> False + } +} +``` + +If you want to match on the beginning of a string and assign the rest to a variable you can use the `<>` operator pattern: + +```gleam +pub fn profession(name: String) -> String { + case name { + "Dr " <> rest -> rest <> " is a doctor" + _ -> "I'm not sure what " <> name <> " does" + } +} +``` + +[stdlib]: https://hexdocs.pm/gleam_stdlib/gleam/string.html + +## Instructions + +In this exercise you'll be processing log-lines. + +Each log line is a string formatted as follows: `"[]: "`. + +There are three different log levels: + +- `INFO` +- `WARNING` +- `ERROR` + +You have three tasks, each of which will take a log line and ask you to do something with it. + +## 1. Get message from a log line + +Implement the `message` function to return a log line's message: + +```gleam +message("[ERROR]: Invalid operation") +// -> "Invalid operation" +``` + +Any leading or trailing white space should be removed: + +```gleam +message("[WARNING]: Disk almost full\r\n") +// -> "Disk almost full" +``` + +## 2. Get log level from a log line + +Implement the `log_level` function to return a log line's log level, which should be returned in lowercase: + +```gleam +log_level("[ERROR]: Invalid operation") +// -> "error" +``` + +## 3. Reformat a log line + +Implement the `reformat` function that reformats the log line, putting the message first and the log level after it in parentheses: + +```gleam +reformat("[INFO]: Operation completed") +// -> "Operation completed (info)" +``` + +## Source + +### Created by + +- @lpil \ No newline at end of file diff --git a/log-levels/gleam.toml b/log-levels/gleam.toml new file mode 100644 index 0000000..28ee917 --- /dev/null +++ b/log-levels/gleam.toml @@ -0,0 +1,14 @@ +name = "log_levels" +version = "0.1.0" + +[dependencies] +gleam_otp = "~> 0.7 or ~> 1.0" +gleam_stdlib = ">= 0.54.0 or ~> 1.0" +simplifile = "~> 1.0" +gleam_erlang = ">= 0.25.0 and < 1.0.0" +gleam_yielder = ">= 1.1.0 and < 2.0.0" +gleam_regexp = ">= 1.1.0 and < 2.0.0" +gleam_deque = ">= 1.0.0 and < 2.0.0" + +[dev-dependencies] +exercism_test_runner = "~> 1.9" diff --git a/log-levels/manifest.toml b/log-levels/manifest.toml new file mode 100644 index 0000000..7b32e9a --- /dev/null +++ b/log-levels/manifest.toml @@ -0,0 +1,31 @@ +# This file was generated by Gleam +# You typically do not need to edit this file + +packages = [ + { name = "argv", version = "1.0.2", build_tools = ["gleam"], requirements = [], otp_app = "argv", source = "hex", outer_checksum = "BA1FF0929525DEBA1CE67256E5ADF77A7CDDFE729E3E3F57A5BDCAA031DED09D" }, + { name = "exercism_test_runner", version = "1.9.0", build_tools = ["gleam"], requirements = ["argv", "gap", "glance", "gleam_community_ansi", "gleam_erlang", "gleam_json", "gleam_stdlib", "simplifile"], otp_app = "exercism_test_runner", source = "hex", outer_checksum = "0B17BB25F2FF1E60266467C24FE0CA04005410306AA05E9A4B41B1852D72865C" }, + { name = "filepath", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "filepath", source = "hex", outer_checksum = "67A6D15FB39EEB69DD31F8C145BB5A421790581BD6AA14B33D64D5A55DBD6587" }, + { name = "gap", version = "1.1.3", build_tools = ["gleam"], requirements = ["gleam_community_ansi", "gleam_stdlib"], otp_app = "gap", source = "hex", outer_checksum = "6EF5E3B523FDFBC317E9EA28D5163EE04744A97C007106F90207569789612291" }, + { name = "glance", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib", "glexer"], otp_app = "glance", source = "hex", outer_checksum = "E155BA1A787FD11827048355021C0390D2FE9A518485526F631A9D472858CC6D" }, + { name = "gleam_community_ansi", version = "1.4.3", build_tools = ["gleam"], requirements = ["gleam_community_colour", "gleam_regexp", "gleam_stdlib"], otp_app = "gleam_community_ansi", source = "hex", outer_checksum = "8A62AE9CC6EA65BEA630D95016D6C07E4F9973565FA3D0DE68DC4200D8E0DD27" }, + { name = "gleam_community_colour", version = "2.0.0", build_tools = ["gleam"], requirements = ["gleam_json", "gleam_stdlib"], otp_app = "gleam_community_colour", source = "hex", outer_checksum = "FDD6AC62C6EC8506C005949A4FCEF032038191D5EAAEC3C9A203CD53AE956ACA" }, + { name = "gleam_deque", version = "1.0.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_deque", source = "hex", outer_checksum = "64D77068931338CF0D0CB5D37522C3E3CCA7CB7D6C5BACB41648B519CC0133C7" }, + { name = "gleam_erlang", version = "0.34.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_erlang", source = "hex", outer_checksum = "0C38F2A128BAA0CEF17C3000BD2097EB80634E239CE31A86400C4416A5D0FDCC" }, + { name = "gleam_json", version = "2.3.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_json", source = "hex", outer_checksum = "C55C5C2B318533A8072D221C5E06E5A75711C129E420DD1CE463342106012E5D" }, + { name = "gleam_otp", version = "0.16.1", build_tools = ["gleam"], requirements = ["gleam_erlang", "gleam_stdlib"], otp_app = "gleam_otp", source = "hex", outer_checksum = "50DA1539FC8E8FA09924EB36A67A2BBB0AD6B27BCDED5A7EF627057CF69D035E" }, + { name = "gleam_regexp", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_regexp", source = "hex", outer_checksum = "7F5E0C0BBEB3C58E57C9CB05FA9002F970C85AD4A63BA1E55CBCB35C15809179" }, + { name = "gleam_stdlib", version = "0.55.0", build_tools = ["gleam"], requirements = [], otp_app = "gleam_stdlib", source = "hex", outer_checksum = "32D8F4AE03771516950047813A9E359249BD9FBA5C33463FDB7B953D6F8E896B" }, + { name = "gleam_yielder", version = "1.1.0", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "gleam_yielder", source = "hex", outer_checksum = "8E4E4ECFA7982859F430C57F549200C7749823C106759F4A19A78AEA6687717A" }, + { name = "glexer", version = "2.2.1", build_tools = ["gleam"], requirements = ["gleam_stdlib"], otp_app = "glexer", source = "hex", outer_checksum = "5C235CBDF4DA5203AD5EAB1D6D8B456ED8162C5424FE2309CFFB7EF438B7C269" }, + { name = "simplifile", version = "1.7.0", build_tools = ["gleam"], requirements = ["filepath", "gleam_stdlib"], otp_app = "simplifile", source = "hex", outer_checksum = "1D5DFA3A2F9319EC85825F6ED88B8E449F381B0D55A62F5E61424E748E7DDEB0" }, +] + +[requirements] +exercism_test_runner = { version = "~> 1.9" } +gleam_deque = { version = ">= 1.0.0 and < 2.0.0" } +gleam_erlang = { version = ">= 0.25.0 and < 1.0.0" } +gleam_otp = { version = "~> 0.7 or ~> 1.0" } +gleam_regexp = { version = ">= 1.1.0 and < 2.0.0" } +gleam_stdlib = { version = ">= 0.54.0 or ~> 1.0" } +gleam_yielder = { version = ">= 1.1.0 and < 2.0.0" } +simplifile = { version = "~> 1.0" } diff --git a/log-levels/src/log_levels.gleam b/log-levels/src/log_levels.gleam new file mode 100644 index 0000000..75503cf --- /dev/null +++ b/log-levels/src/log_levels.gleam @@ -0,0 +1,28 @@ +import gleam/string + +pub fn message(log_line: String) -> String { + case log_line { + "[INFO]:" <> rest -> string.trim(rest) + "[WARNING]:" <> rest -> string.trim(rest) + "[ERROR]:" <> rest -> string.trim(rest) + _ -> log_line + } +} + +pub fn log_level(log_line: String) -> String { + case log_line { + "[INFO]" <> _ -> "info" + "[WARNING]" <> _ -> "warning" + "[ERROR]" <> _ -> "error" + _ -> log_line + } +} + +pub fn reformat(log_line: String) -> String { + case log_line { + "[INFO]:" <> rest -> string.trim(rest) <> " (info)" + "[WARNING]:" <> rest -> string.trim(rest) <> " (warning)" + "[ERROR]:" <> rest -> string.trim(rest) <> " (error)" + _ -> log_line + } +} diff --git a/log-levels/test/log_levels_test.gleam b/log-levels/test/log_levels_test.gleam new file mode 100644 index 0000000..8f30eca --- /dev/null +++ b/log-levels/test/log_levels_test.gleam @@ -0,0 +1,62 @@ +import exercism/should +import exercism/test_runner +import log_levels + +pub fn main() { + test_runner.main() +} + +pub fn error_message_test() { + log_levels.message("[ERROR]: Stack overflow") + |> should.equal("Stack overflow") +} + +pub fn warning_message_test() { + log_levels.message("[WARNING]: Disk almost full") + |> should.equal("Disk almost full") +} + +pub fn info_message_test() { + log_levels.message("[INFO]: File moved") + |> should.equal("File moved") +} + +pub fn message_with_leading_and_trailing_white_space_test() { + log_levels.message("[WARNING]: \tTimezone not set \r\n") + |> should.equal("Timezone not set") +} + +pub fn error_log_level_test() { + log_levels.log_level("[ERROR]: Disk full") + |> should.equal("error") +} + +pub fn warning_log_level_test() { + log_levels.log_level("[WARNING]: Unsafe password") + |> should.equal("warning") +} + +pub fn info_log_level_test() { + log_levels.log_level("[INFO]: Timezone changed") + |> should.equal("info") +} + +pub fn error_reformat_test() { + log_levels.reformat("[ERROR]: Segmentation fault") + |> should.equal("Segmentation fault (error)") +} + +pub fn warning_reformat_test() { + log_levels.reformat("[WARNING]: Decreased performance") + |> should.equal("Decreased performance (warning)") +} + +pub fn info_reformat_test() { + log_levels.reformat("[INFO]: Disk defragmented") + |> should.equal("Disk defragmented (info)") +} + +pub fn reformat_with_leading_and_trailing_white_space_test() { + log_levels.reformat("[ERROR]: \t Corrupt disk\t \t \r\n") + |> should.equal("Corrupt disk (error)") +}