feat: add simple todo list module

main
Moritz Böhme 2024-08-01 20:25:13 +02:00
commit 0aed1dcd0e
Signed by: moritz
GPG Key ID: 970C6E89EB0547A9
6 changed files with 186 additions and 0 deletions

1
.envrc Normal file
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use flake

17
.gitignore vendored Normal file
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### direnv ###
.direnv
.envrc
### Elixir ###
/_build
/cover
/deps
/doc
/.fetch
erl_crash.dump
*.ez
*.beam
/config/*.secret.exs
.elixir_ls/
### Elixir Patch ###

58
flake.lock Normal file
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{
"nodes": {
"flake-parts": {
"inputs": {
"nixpkgs-lib": "nixpkgs-lib"
},
"locked": {
"lastModified": 1719994518,
"narHash": "sha256-pQMhCCHyQGRzdfAkdJ4cIWiw+JNuWsTX7f0ZYSyz0VY=",
"owner": "hercules-ci",
"repo": "flake-parts",
"rev": "9227223f6d922fee3c7b190b2cc238a99527bbb7",
"type": "github"
},
"original": {
"owner": "hercules-ci",
"repo": "flake-parts",
"type": "github"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1722185531,
"narHash": "sha256-veKR07psFoJjINLC8RK4DiLniGGMgF3QMlS4tb74S6k=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "52ec9ac3b12395ad677e8b62106f0b98c1f8569d",
"type": "github"
},
"original": {
"owner": "NixOS",
"ref": "nixos-unstable",
"repo": "nixpkgs",
"type": "github"
}
},
"nixpkgs-lib": {
"locked": {
"lastModified": 1719876945,
"narHash": "sha256-Fm2rDDs86sHy0/1jxTOKB1118Q0O3Uc7EC0iXvXKpbI=",
"type": "tarball",
"url": "https://github.com/NixOS/nixpkgs/archive/5daf0514482af3f97abaefc78a6606365c9108e2.tar.gz"
},
"original": {
"type": "tarball",
"url": "https://github.com/NixOS/nixpkgs/archive/5daf0514482af3f97abaefc78a6606365c9108e2.tar.gz"
}
},
"root": {
"inputs": {
"flake-parts": "flake-parts",
"nixpkgs": "nixpkgs"
}
}
},
"root": "root",
"version": 7
}

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flake.nix Normal file
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{
description = "Description for the project";
inputs = {
flake-parts.url = "github:hercules-ci/flake-parts";
nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
};
outputs = inputs@{ flake-parts, ... }:
flake-parts.lib.mkFlake { inherit inputs; } {
imports = [
# To import a flake module
# 1. Add foo to inputs
# 2. Add foo as a parameter to the outputs function
# 3. Add here: foo.flakeModule
];
systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" "x86_64-darwin" ];
perSystem = { config, self', inputs', pkgs, system, ... }: {
# Per-system attributes can be defined here. The self' and inputs'
# module parameters provide easy access to attributes of the same
# system.
# Equivalent to inputs'.nixpkgs.legacyPackages.hello;
devShells.default = pkgs.mkShell {
nativeBuildInputs = with pkgs; [ elixir-ls elixir_1_17];
};
};
flake = {
# The usual flake attributes can be defined here, including system-
# agnostic ones like nixosModule and system-enumerating ones, although
# those are more easily expressed in perSystem.
};
};
}

3
todo_list.csv Normal file
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2024-12-19,Dentist
2024-12-20,Shopping
2024-12-19,Movies
1 2024-12-19 Dentist
2 2024-12-20 Shopping
3 2024-12-19 Movies

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todo_list.ex Normal file
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defmodule TodoList do
defstruct entries: %{}, next_id: 1
def new(entries \\ []) do
Enum.reduce(entries, %__MODULE__{}, &add(&2, &1))
end
def add(
%__MODULE__{entries: entries, next_id: next_id} = todo_list,
%{date: _, title: _} = entry
) do
new_entry = Map.put(entry, :id, next_id)
new_entries = Map.put(entries, next_id, new_entry)
%__MODULE__{todo_list | entries: new_entries, next_id: next_id + 1}
end
def entries(%__MODULE__{entries: entries}, date) do
entries
|> Map.filter(fn {_, entry} -> entry.date == date end)
|> Map.values()
end
def update(%__MODULE__{entries: entries} = todo_list, id, update_fun)
when is_function(update_fun, 1) do
case Map.fetch(entries, id) do
:error ->
todo_list
{:ok, entry} ->
new_entry = update_fun.(entry)
new_entries = Map.put(entries, id, new_entry)
%__MODULE__{todo_list | entries: new_entries}
end
end
def delete(%__MODULE__{entries: entries} = todo_list, id) when is_number(id) do
new_entries = Map.delete(entries, id)
%__MODULE__{todo_list | entries: new_entries}
end
end
defmodule TodoList.CSVImporter do
def import(path) do
path
|> File.stream!()
|> Stream.map(&parse_line/1)
|> TodoList.new()
end
defp parse_line(line) do
line
|> String.trim()
|> String.split(",")
|> create_entry()
end
defp create_entry([date, title]) do
final_date = parse_date(date)
%{date: final_date, title: title}
end
defp parse_date(string) do
[year, month, day] = string |> String.split("-") |> Enum.map(&String.to_integer/1)
Date.new!(year, month, day)
end
end