initial commit

This commit is contained in:
Peter Tillemans 2023-09-03 02:12:43 +02:00
commit 3669ea6eb7
11 changed files with 905 additions and 0 deletions

44
.air.toml Normal file
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root = "."
testdata_dir = "testdata"
tmp_dir = "tmp"
[build]
args_bin = []
bin = "./tmp/main"
cmd = "go build -o ./tmp/main ."
delay = 0
exclude_dir = ["assets", "tmp", "vendor", "testdata"]
exclude_file = []
exclude_regex = ["_test.go"]
exclude_unchanged = false
follow_symlink = false
full_bin = ""
include_dir = []
include_ext = ["go", "tpl", "tmpl", "html"]
include_file = []
kill_delay = "0s"
log = "build-errors.log"
poll = false
poll_interval = 0
rerun = false
rerun_delay = 500
send_interrupt = false
stop_on_error = false
[color]
app = ""
build = "yellow"
main = "magenta"
runner = "green"
watcher = "cyan"
[log]
main_only = false
time = false
[misc]
clean_on_exit = false
[screen]
clear_on_rebuild = false
keep_scroll = true

1
.gitignore vendored Normal file
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tmp

16
README.md Normal file
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# Todo App with GO and HTMX
## Plan
- [x] create Go webserver
- [x] create landing page
- [x] import HTMX code
- [x] display todo list
- [ ] add tailwind CSS
- [ ] show todo list
- [ ] let todos be marked completed
- [ ] remove todos
- [ ] add new todo with form
- [ ] persist todos in redis
- [ ] spruce up

10
go.mod Normal file
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module snamellit.com/play/todo
go 1.21.0
require github.com/redis/go-redis/v9 v9.1.0
require (
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
)

10
go.sum Normal file
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github.com/bsm/ginkgo/v2 v2.9.5 h1:rtVBYPs3+TC5iLUVOis1B9tjLTup7Cj5IfzosKtvTJ0=
github.com/bsm/ginkgo/v2 v2.9.5/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
github.com/bsm/gomega v1.26.0 h1:LhQm+AFcgV2M0WyKroMASzAzCAJVpAxQXv4SaI9a69Y=
github.com/bsm/gomega v1.26.0/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
github.com/redis/go-redis/v9 v9.1.0 h1:137FnGdk+EQdCbye1FW+qOEcY5S+SpY9T0NiuqvtfMY=
github.com/redis/go-redis/v9 v9.1.0/go.mod h1:urWj3He21Dj5k4TK1y59xH8Uj6ATueP8AH1cY3lZl4c=

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input.css Normal file
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@tailwind base;
@tailwind components;
@tailwind utilities;

141
main.go Normal file
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package main
import (
"context"
"fmt"
"github.com/redis/go-redis/v9"
"log"
"encoding/json"
"net/http"
"html/template"
"strconv"
)
type todo struct {
Id int
Title string
Completed bool
}
var maxId int = 0
var ctx = context.Background()
var rdb = redis.NewClient(&redis.Options{
Addr: "localhost:6379",
Password: "", // no password set
DB: 0, // use default DB
})
func GetTodos() []todo {
var cursor uint64 = 0
todosJson, cursor, err := rdb.Scan(ctx, cursor, "todo:*", 20).Result()
if err != nil {
panic(err)
}
var todos []todo = make([]todo, len(todosJson))
for idx, todoJson := range todosJson {
todoJson := rdb.Get(ctx, todoJson).Val()
fmt.Println("Todo: %s", todoJson)
err = json.Unmarshal([]byte(todoJson), &todos[idx])
if err != nil {
panic(err)
}
if todos[idx].Id > maxId {
maxId = todos[idx].Id
}
}
return todos
}
func GetTodoById(id int) todo {
todoJson, err := rdb.Get(ctx, fmt.Sprintf("todo:%d", id)).Result()
if err != nil {
panic(err)
}
var todo todo
err = json.Unmarshal([]byte(todoJson), &todo)
if err != nil {
panic(err)
}
return todo
}
func SetTodo(todo todo) {
todoJson, err := json.Marshal(todo)
if err != nil {
panic(err)
}
key := fmt.Sprintf("todo:%d", todo.Id)
err = rdb.Set(ctx, key, string(todoJson), 0).Err()
if err != nil {
panic(err)
}
fmt.Println("Set todo: %s", todoJson)
}
func DeleteTodoById(id int) {
err := rdb.Del(ctx, fmt.Sprintf("todo:%d", id)).Err()
if err != nil {
panic(err)
}
}
func IndexHandler(w http.ResponseWriter, r *http.Request) {
t, _ := template.ParseFiles("templates/index.html")
t.Execute(w, nil)
}
func TodosHandler(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" {
r.ParseForm()
todoTitle := r.Form.Get("title")
SetTodo(todo{Id: maxId + 1, Title: todoTitle, Completed: false})
}
todos := GetTodos()
t, _ := template.ParseFiles("templates/todos.html")
t.Execute(w, todos)
}
func ToggleTodoHandler(w http.ResponseWriter, r *http.Request) {
todoId, err := strconv.Atoi(r.URL.Path)
if err != nil {
panic(err)
}
fmt.Println("Todo Id: %d", todoId)
todo := GetTodoById(todoId)
todo.Completed = !todo.Completed
SetTodo(todo)
TodosHandler(w, r)
return
}
func TodoHandler(w http.ResponseWriter, r *http.Request) {
if r.Method != "DELETE" {
w.WriteHeader(http.StatusMethodNotAllowed)
fmt.Fprintf(w, "Method %s not allowed", r.Method)
return
}
todoId, err := strconv.Atoi(r.URL.Path)
if err != nil {
panic(err)
}
fmt.Println("Todo Id: %d", todoId)
DeleteTodoById(todoId)
TodosHandler(w, r)
return
}
func main() {
fmt.Println("Starting web server on port 8080")
fs := http.FileServer(http.Dir("./static"))
http.Handle("/static/", http.StripPrefix("/static/", fs))
http.HandleFunc("/", IndexHandler)
http.HandleFunc("/todos", TodosHandler)
togglePath := "/toggle-todo/"
http.Handle(togglePath, http.StripPrefix(togglePath, http.HandlerFunc(ToggleTodoHandler)))
todoPath := "/todo/"
http.Handle(todoPath, http.StripPrefix(todoPath, http.HandlerFunc(TodoHandler)))
log.Fatal(http.ListenAndServe(":8080", nil))
}

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/*
! tailwindcss v3.3.3 | MIT License | https://tailwindcss.com
*/
/*
1. Prevent padding and border from affecting element width. (https://github.com/mozdevs/cssremedy/issues/4)
2. Allow adding a border to an element by just adding a border-width. (https://github.com/tailwindcss/tailwindcss/pull/116)
*/
*,
::before,
::after {
box-sizing: border-box;
/* 1 */
border-width: 0;
/* 2 */
border-style: solid;
/* 2 */
border-color: #e5e7eb;
/* 2 */
}
::before,
::after {
--tw-content: '';
}
/*
1. Use a consistent sensible line-height in all browsers.
2. Prevent adjustments of font size after orientation changes in iOS.
3. Use a more readable tab size.
4. Use the user's configured `sans` font-family by default.
5. Use the user's configured `sans` font-feature-settings by default.
6. Use the user's configured `sans` font-variation-settings by default.
*/
html {
line-height: 1.5;
/* 1 */
-webkit-text-size-adjust: 100%;
/* 2 */
-moz-tab-size: 4;
/* 3 */
-o-tab-size: 4;
tab-size: 4;
/* 3 */
font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
/* 4 */
font-feature-settings: normal;
/* 5 */
font-variation-settings: normal;
/* 6 */
}
/*
1. Remove the margin in all browsers.
2. Inherit line-height from `html` so users can set them as a class directly on the `html` element.
*/
body {
margin: 0;
/* 1 */
line-height: inherit;
/* 2 */
}
/*
1. Add the correct height in Firefox.
2. Correct the inheritance of border color in Firefox. (https://bugzilla.mozilla.org/show_bug.cgi?id=190655)
3. Ensure horizontal rules are visible by default.
*/
hr {
height: 0;
/* 1 */
color: inherit;
/* 2 */
border-top-width: 1px;
/* 3 */
}
/*
Add the correct text decoration in Chrome, Edge, and Safari.
*/
abbr:where([title]) {
-webkit-text-decoration: underline dotted;
text-decoration: underline dotted;
}
/*
Remove the default font size and weight for headings.
*/
h1,
h2,
h3,
h4,
h5,
h6 {
font-size: inherit;
font-weight: inherit;
}
/*
Reset links to optimize for opt-in styling instead of opt-out.
*/
a {
color: inherit;
text-decoration: inherit;
}
/*
Add the correct font weight in Edge and Safari.
*/
b,
strong {
font-weight: bolder;
}
/*
1. Use the user's configured `mono` font family by default.
2. Correct the odd `em` font sizing in all browsers.
*/
code,
kbd,
samp,
pre {
font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
/* 1 */
font-size: 1em;
/* 2 */
}
/*
Add the correct font size in all browsers.
*/
small {
font-size: 80%;
}
/*
Prevent `sub` and `sup` elements from affecting the line height in all browsers.
*/
sub,
sup {
font-size: 75%;
line-height: 0;
position: relative;
vertical-align: baseline;
}
sub {
bottom: -0.25em;
}
sup {
top: -0.5em;
}
/*
1. Remove text indentation from table contents in Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=999088, https://bugs.webkit.org/show_bug.cgi?id=201297)
2. Correct table border color inheritance in all Chrome and Safari. (https://bugs.chromium.org/p/chromium/issues/detail?id=935729, https://bugs.webkit.org/show_bug.cgi?id=195016)
3. Remove gaps between table borders by default.
*/
table {
text-indent: 0;
/* 1 */
border-color: inherit;
/* 2 */
border-collapse: collapse;
/* 3 */
}
/*
1. Change the font styles in all browsers.
2. Remove the margin in Firefox and Safari.
3. Remove default padding in all browsers.
*/
button,
input,
optgroup,
select,
textarea {
font-family: inherit;
/* 1 */
font-feature-settings: inherit;
/* 1 */
font-variation-settings: inherit;
/* 1 */
font-size: 100%;
/* 1 */
font-weight: inherit;
/* 1 */
line-height: inherit;
/* 1 */
color: inherit;
/* 1 */
margin: 0;
/* 2 */
padding: 0;
/* 3 */
}
/*
Remove the inheritance of text transform in Edge and Firefox.
*/
button,
select {
text-transform: none;
}
/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Remove default button styles.
*/
button,
[type='button'],
[type='reset'],
[type='submit'] {
-webkit-appearance: button;
/* 1 */
background-color: transparent;
/* 2 */
background-image: none;
/* 2 */
}
/*
Use the modern Firefox focus style for all focusable elements.
*/
:-moz-focusring {
outline: auto;
}
/*
Remove the additional `:invalid` styles in Firefox. (https://github.com/mozilla/gecko-dev/blob/2f9eacd9d3d995c937b4251a5557d95d494c9be1/layout/style/res/forms.css#L728-L737)
*/
:-moz-ui-invalid {
box-shadow: none;
}
/*
Add the correct vertical alignment in Chrome and Firefox.
*/
progress {
vertical-align: baseline;
}
/*
Correct the cursor style of increment and decrement buttons in Safari.
*/
::-webkit-inner-spin-button,
::-webkit-outer-spin-button {
height: auto;
}
/*
1. Correct the odd appearance in Chrome and Safari.
2. Correct the outline style in Safari.
*/
[type='search'] {
-webkit-appearance: textfield;
/* 1 */
outline-offset: -2px;
/* 2 */
}
/*
Remove the inner padding in Chrome and Safari on macOS.
*/
::-webkit-search-decoration {
-webkit-appearance: none;
}
/*
1. Correct the inability to style clickable types in iOS and Safari.
2. Change font properties to `inherit` in Safari.
*/
::-webkit-file-upload-button {
-webkit-appearance: button;
/* 1 */
font: inherit;
/* 2 */
}
/*
Add the correct display in Chrome and Safari.
*/
summary {
display: list-item;
}
/*
Removes the default spacing and border for appropriate elements.
*/
blockquote,
dl,
dd,
h1,
h2,
h3,
h4,
h5,
h6,
hr,
figure,
p,
pre {
margin: 0;
}
fieldset {
margin: 0;
padding: 0;
}
legend {
padding: 0;
}
ol,
ul,
menu {
list-style: none;
margin: 0;
padding: 0;
}
/*
Reset default styling for dialogs.
*/
dialog {
padding: 0;
}
/*
Prevent resizing textareas horizontally by default.
*/
textarea {
resize: vertical;
}
/*
1. Reset the default placeholder opacity in Firefox. (https://github.com/tailwindlabs/tailwindcss/issues/3300)
2. Set the default placeholder color to the user's configured gray 400 color.
*/
input::-moz-placeholder, textarea::-moz-placeholder {
opacity: 1;
/* 1 */
color: #9ca3af;
/* 2 */
}
input::placeholder,
textarea::placeholder {
opacity: 1;
/* 1 */
color: #9ca3af;
/* 2 */
}
/*
Set the default cursor for buttons.
*/
button,
[role="button"] {
cursor: pointer;
}
/*
Make sure disabled buttons don't get the pointer cursor.
*/
:disabled {
cursor: default;
}
/*
1. Make replaced elements `display: block` by default. (https://github.com/mozdevs/cssremedy/issues/14)
2. Add `vertical-align: middle` to align replaced elements more sensibly by default. (https://github.com/jensimmons/cssremedy/issues/14#issuecomment-634934210)
This can trigger a poorly considered lint error in some tools but is included by design.
*/
img,
svg,
video,
canvas,
audio,
iframe,
embed,
object {
display: block;
/* 1 */
vertical-align: middle;
/* 2 */
}
/*
Constrain images and videos to the parent width and preserve their intrinsic aspect ratio. (https://github.com/mozdevs/cssremedy/issues/14)
*/
img,
video {
max-width: 100%;
height: auto;
}
/* Make elements with the HTML hidden attribute stay hidden by default */
[hidden] {
display: none;
}
*, ::before, ::after {
--tw-border-spacing-x: 0;
--tw-border-spacing-y: 0;
--tw-translate-x: 0;
--tw-translate-y: 0;
--tw-rotate: 0;
--tw-skew-x: 0;
--tw-skew-y: 0;
--tw-scale-x: 1;
--tw-scale-y: 1;
--tw-pan-x: ;
--tw-pan-y: ;
--tw-pinch-zoom: ;
--tw-scroll-snap-strictness: proximity;
--tw-gradient-from-position: ;
--tw-gradient-via-position: ;
--tw-gradient-to-position: ;
--tw-ordinal: ;
--tw-slashed-zero: ;
--tw-numeric-figure: ;
--tw-numeric-spacing: ;
--tw-numeric-fraction: ;
--tw-ring-inset: ;
--tw-ring-offset-width: 0px;
--tw-ring-offset-color: #fff;
--tw-ring-color: rgb(59 130 246 / 0.5);
--tw-ring-offset-shadow: 0 0 #0000;
--tw-ring-shadow: 0 0 #0000;
--tw-shadow: 0 0 #0000;
--tw-shadow-colored: 0 0 #0000;
--tw-blur: ;
--tw-brightness: ;
--tw-contrast: ;
--tw-grayscale: ;
--tw-hue-rotate: ;
--tw-invert: ;
--tw-saturate: ;
--tw-sepia: ;
--tw-drop-shadow: ;
--tw-backdrop-blur: ;
--tw-backdrop-brightness: ;
--tw-backdrop-contrast: ;
--tw-backdrop-grayscale: ;
--tw-backdrop-hue-rotate: ;
--tw-backdrop-invert: ;
--tw-backdrop-opacity: ;
--tw-backdrop-saturate: ;
--tw-backdrop-sepia: ;
}
::backdrop {
--tw-border-spacing-x: 0;
--tw-border-spacing-y: 0;
--tw-translate-x: 0;
--tw-translate-y: 0;
--tw-rotate: 0;
--tw-skew-x: 0;
--tw-skew-y: 0;
--tw-scale-x: 1;
--tw-scale-y: 1;
--tw-pan-x: ;
--tw-pan-y: ;
--tw-pinch-zoom: ;
--tw-scroll-snap-strictness: proximity;
--tw-gradient-from-position: ;
--tw-gradient-via-position: ;
--tw-gradient-to-position: ;
--tw-ordinal: ;
--tw-slashed-zero: ;
--tw-numeric-figure: ;
--tw-numeric-spacing: ;
--tw-numeric-fraction: ;
--tw-ring-inset: ;
--tw-ring-offset-width: 0px;
--tw-ring-offset-color: #fff;
--tw-ring-color: rgb(59 130 246 / 0.5);
--tw-ring-offset-shadow: 0 0 #0000;
--tw-ring-shadow: 0 0 #0000;
--tw-shadow: 0 0 #0000;
--tw-shadow-colored: 0 0 #0000;
--tw-blur: ;
--tw-brightness: ;
--tw-contrast: ;
--tw-grayscale: ;
--tw-hue-rotate: ;
--tw-invert: ;
--tw-saturate: ;
--tw-sepia: ;
--tw-drop-shadow: ;
--tw-backdrop-blur: ;
--tw-backdrop-brightness: ;
--tw-backdrop-contrast: ;
--tw-backdrop-grayscale: ;
--tw-backdrop-hue-rotate: ;
--tw-backdrop-invert: ;
--tw-backdrop-opacity: ;
--tw-backdrop-saturate: ;
--tw-backdrop-sepia: ;
}
.block {
display: block;
}
.flex {
display: flex;
}
.grid {
display: grid;
}
.grow {
flex-grow: 1;
}
.grid-cols-1 {
grid-template-columns: repeat(1, minmax(0, 1fr));
}
.flex-row {
flex-direction: row;
}
.gap-2 {
gap: 0.5rem;
}
.space-x-4 > :not([hidden]) ~ :not([hidden]) {
--tw-space-x-reverse: 0;
margin-right: calc(1rem * var(--tw-space-x-reverse));
margin-left: calc(1rem * calc(1 - var(--tw-space-x-reverse)));
}
.rounded {
border-radius: 0.25rem;
}
.rounded-xl {
border-radius: 0.75rem;
}
.bg-slate-100 {
--tw-bg-opacity: 1;
background-color: rgb(241 245 249 / var(--tw-bg-opacity));
}
.bg-slate-200 {
--tw-bg-opacity: 1;
background-color: rgb(226 232 240 / var(--tw-bg-opacity));
}
.bg-red-500 {
--tw-bg-opacity: 1;
background-color: rgb(239 68 68 / var(--tw-bg-opacity));
}
.bg-sky-500 {
--tw-bg-opacity: 1;
background-color: rgb(14 165 233 / var(--tw-bg-opacity));
}
.p-4 {
padding: 1rem;
}
.p-8 {
padding: 2rem;
}
.text-2xl {
font-size: 1.5rem;
line-height: 2rem;
}
.text-3xl {
font-size: 1.875rem;
line-height: 2.25rem;
}
.font-bold {
font-weight: 700;
}
.underline {
text-decoration-line: underline;
}
.shadow-lg {
--tw-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
--tw-shadow-colored: 0 10px 15px -3px var(--tw-shadow-color), 0 4px 6px -4px var(--tw-shadow-color);
box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
}

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/** @type {import('tailwindcss').Config} */
module.exports = {
content: ["./templates/*.html"],
theme: {
extend: {},
},
plugins: [],
}

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<html>
<head>
<title>ToDo Application</title>
<script src="https://unpkg.com/htmx.org@1.9.5"></script>
<link href="static/output.css" rel="stylesheet"></link>
</head>
<body>
<h1 class="text-3xl font-bold underline">ToDo Application</h1>
<div class="bg-slate-200 p-8">
<h2 class="text-2xl font-bold">Tasks</h2>
<ul hx-get="/todos" hx-swap="outerHTML" hx-trigger="load" class="shadow-lg space-x-4">
<li>some</li>
<li>tasks...</li>
</ul>
</div>
<address>
<a href="mailto:pti@mars"></a>
</address>
</body>
</html>

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<ul id="todos" class="shadow-lg grid grid-cols-1 gap-2">
{{range $index, $task := . }}
<li id={{$task.Id}} class="p-4 rounded-xl bg-slate-100">
<input type="checkbox" {{if $task.Completed}}checked{{end}}
hx-post="/toggle-todo/{{$task.Id}}" hx-swap="outerHTML" hx-target="#todos">
{{$task.Title}}
<button class="bg-red-500"
hx-delete="/todo/{{$task.Id}}" hx-swap="outerHTML" hx-target="#todos">X</button>
</li>
{{end}}
<li>
<form class="p-4 rounded-xl bg-slate-100" hx-post="/todos" hx-swap="outerHTML" hx-target="#todos">
<label class="flex p-4">
Title:
<input type="text" name="title" class="grow" ></input>
<button name="submit" class="bg-sky-500">Add</button>
</label>
</form>
</li>
</ul>