commit 16cd7aa63564ef7a6278e461fd92def8ae91cfeb
Author: Ivan Reshetnikov <ordinarydev@protonmail.com>
Date:   Thu Apr 6 10:36:11 2023 +0500

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a86cc73
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.sqlite3
+*.db
diff --git a/assets/auth.css b/assets/auth.css
new file mode 100644
index 0000000..010849d
--- /dev/null
+++ b/assets/auth.css
@@ -0,0 +1,24 @@
+.page {
+    width: 100%;
+    height: 100%;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+form {
+    width: 100%;
+    padding: 0 1em;
+}
+
+input,
+button {
+    width: 100%;
+    margin-top: 10px;
+}
+
+@media screen and (min-width: 600px) {
+    form {
+        max-width: 400px;
+    }
+}
diff --git a/assets/base.css b/assets/base.css
new file mode 100644
index 0000000..1607004
--- /dev/null
+++ b/assets/base.css
@@ -0,0 +1,48 @@
+html,
+body {
+    height: 100%;
+}
+
+body {
+    margin: 0;
+    background:
+        linear-gradient(0deg,  #1d1926 19px, transparent 1px) center,
+        linear-gradient(90deg, #1d1926 19px, transparent 1px) center,
+        #7a7093;
+    background-size: 20px 20px;
+    font-family: sans-serif;
+    font-size: 16px;
+    color: white;
+}
+
+* {
+    box-sizing: border-box;
+}
+
+a {
+    color: inherit;
+}
+
+input,
+button {
+    font-size: inherit;
+    font-family: inherit;
+    padding: 8px 10px;
+    outline: none;
+    background-color: #24272d;
+    color: white;
+    border: 2px solid gray;
+    border-radius: 5px;
+    transition: border-color 0.1s ease-in-out;
+}
+
+button {
+    cursor: pointer;
+}
+
+input:focus,
+input:hover,
+button:active,
+button:hover {
+    border-color: #812abd;
+}
diff --git a/assets/error.css b/assets/error.css
new file mode 100644
index 0000000..1bbd9b0
--- /dev/null
+++ b/assets/error.css
@@ -0,0 +1,18 @@
+.page {
+    width: 100%;
+    height: 100%;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+.content {
+    padding: 0 1em;
+    width: 100%;
+}
+
+@media screen and (min-width: 600px) {
+    .content {
+        max-width: 400px;
+    }
+}
diff --git a/assets/index.css b/assets/index.css
new file mode 100644
index 0000000..ac134ee
--- /dev/null
+++ b/assets/index.css
@@ -0,0 +1,32 @@
+.page {
+    padding: 2em 1em;
+}
+
+.row {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 1em;
+    margin-top: 3em;
+}
+
+.group {
+    width: 100%;
+}
+
+h2 {
+    margin-top: 0;
+}
+
+a {
+    display: block;
+    margin-top: 10px;
+}
+
+@media screen and (min-width: 600px) {
+    .page {
+        padding: 2em 10em
+    }
+    .group {
+        max-width: 230px;
+    }
+}
diff --git a/assets/settings.css b/assets/settings.css
new file mode 100644
index 0000000..4f069f4
--- /dev/null
+++ b/assets/settings.css
@@ -0,0 +1,50 @@
+body {
+    padding: 2em 1em;
+}
+
+.row {
+    display: flex;
+    gap: 10px;
+    margin-top: 1em;
+    width: 100%;
+}
+
+.innerForm {
+    display: flex;
+    gap: 10px;
+    min-width: 0;
+    flex-grow: 1;
+}
+
+.row:last-child {
+    padding-bottom: 4em;
+}
+
+h2 {
+    font-size: 20px;
+    margin-top: 3em;
+    margin-bottom: 10px;
+}
+
+input {
+    min-width: 0;
+    flex-grow: 1;
+}
+
+.link-name {
+    width: 130px;
+    flex-grow: 0;
+}
+
+.link-href {
+    flex-grow: 1;
+}
+
+@media screen and (min-width: 600px) {
+    body {
+        padding: 2em 10em;
+    }
+    .row {
+        max-width: 500px;
+    }
+}
diff --git a/assets/svg/floppy-disk-solid.svg b/assets/svg/floppy-disk-solid.svg
new file mode 100644
index 0000000..f631504
--- /dev/null
+++ b/assets/svg/floppy-disk-solid.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512">
+<!--! Font Awesome Pro 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. -->
+<path fill="white" d="M64 32C28.7 32 0 60.7 0 96V416c0 35.3 28.7 64 64 64H384c35.3 0 64-28.7 64-64V173.3c0-17-6.7-33.3-18.7-45.3L352 50.7C340 38.7 323.7 32 306.7 32H64zm0 96c0-17.7 14.3-32 32-32H288c17.7 0 32 14.3 32 32v64c0 17.7-14.3 32-32 32H96c-17.7 0-32-14.3-32-32V128zM224 288a64 64 0 1 1 0 128 64 64 0 1 1 0-128z"/>
+</svg>
diff --git a/assets/svg/plus-solid.svg b/assets/svg/plus-solid.svg
new file mode 100644
index 0000000..c9688bc
--- /dev/null
+++ b/assets/svg/plus-solid.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512">
+<!--! Font Awesome Pro 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. -->
+<path fill="white" d="M256 80c0-17.7-14.3-32-32-32s-32 14.3-32 32V224H48c-17.7 0-32 14.3-32 32s14.3 32 32 32H192V432c0 17.7 14.3 32 32 32s32-14.3 32-32V288H400c17.7 0 32-14.3 32-32s-14.3-32-32-32H256V80z"/>
+</svg>
diff --git a/assets/svg/trash-solid.svg b/assets/svg/trash-solid.svg
new file mode 100644
index 0000000..aaccb15
--- /dev/null
+++ b/assets/svg/trash-solid.svg
@@ -0,0 +1,4 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512">
+<!--! Font Awesome Pro 6.4.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license (Commercial License) Copyright 2023 Fonticons, Inc. -->
+<path fill="white" d="M135.2 17.7L128 32H32C14.3 32 0 46.3 0 64S14.3 96 32 96H416c17.7 0 32-14.3 32-32s-14.3-32-32-32H320l-7.2-14.3C307.4 6.8 296.3 0 284.2 0H163.8c-12.1 0-23.2 6.8-28.6 17.7zM416 128H32L53.2 467c1.6 25.3 22.6 45 47.9 45H346.9c25.3 0 46.3-19.7 47.9-45L416 128z"/>
+</svg>
diff --git a/backend/admins.go b/backend/admins.go
new file mode 100644
index 0000000..7bb9aaa
--- /dev/null
+++ b/backend/admins.go
@@ -0,0 +1,108 @@
+package backend
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+	"errors"
+	"github.com/gin-gonic/gin"
+	"golang.org/x/crypto/bcrypt"
+	"gorm.io/gorm"
+	"time"
+)
+
+type Admin struct {
+	ID           uint64   `gorm:"primaryKey"`
+	Username     string `gorm:"unique;notNull"`
+	Bcrypt       string `gorm:"notNull"`
+	AccessTokens []AccessToken
+}
+
+type AccessToken struct {
+    ID      uint64  `gorm:"primaryKey"`
+	Value      string    `gorm:"notNull"`
+	AdminID    uint64      `gorm:"notNull"`
+	ValidUntil time.Time `gorm:"NotNull"`
+}
+
+func CountAdmins(db *gorm.DB) int64 {
+	var admins []Admin
+	var count int64
+	db.Model(&admins).Count(&count)
+	return count
+}
+
+func CreateAdmin(db *gorm.DB, username string, password string) (Admin, error) {
+	hash, err := bcrypt.GenerateFromPassword([]byte(password), 10)
+	if err != nil {
+		return Admin{}, err
+	}
+
+	admin := Admin{
+		Username: username,
+		Bcrypt:   string(hash),
+	}
+	result := db.Create(&admin)
+
+	if result.Error != nil {
+		return Admin{}, result.Error
+	}
+
+	return admin, nil
+}
+
+func AuthorizeAdmin(db *gorm.DB, username string, password string) (Admin, error) {
+	var admin Admin
+	result := db.Where("username = ?", username).First(&admin)
+
+	if result.Error != nil {
+		return Admin{}, result.Error
+	}
+
+	err := bcrypt.CompareHashAndPassword([]byte(admin.Bcrypt), []byte(password))
+	if err != nil {
+		return Admin{}, err
+	}
+
+	return admin, nil
+}
+
+func CreateAccessToken(db *gorm.DB, adminID uint64) (AccessToken, error) {
+	bytes := make([]byte, 64)
+	if _, err := rand.Read(bytes); err != nil {
+		return AccessToken{}, err
+	}
+
+	accessToken := AccessToken{
+		AdminID: adminID,
+		Value:   base64.StdEncoding.EncodeToString(bytes),
+		// Valid for 1 month
+		ValidUntil: time.Now().AddDate(0, 1, 0),
+	}
+	result := db.Create(&accessToken)
+
+	if result.Error != nil {
+		return AccessToken{}, result.Error
+	}
+
+	return accessToken, nil
+}
+
+// Save token for 29 days in cookies
+func SetTokenCookie(c *gin.Context, token AccessToken) {
+	c.SetCookie("phoenix-token", token.Value, 60*60*24*29, "/", "", false, true)
+}
+
+func ValidateToken(db *gorm.DB, value string) error {
+	var token AccessToken
+	result := db.Where("value = ?", value).First(&token)
+
+	if result.Error != nil {
+		return result.Error
+	}
+
+	if time.Now().After(token.ValidUntil) {
+		return errors.New("Access token expired")
+	}
+
+	return nil
+}
diff --git a/backend/db.go b/backend/db.go
new file mode 100644
index 0000000..8cf29ea
--- /dev/null
+++ b/backend/db.go
@@ -0,0 +1,18 @@
+package backend
+
+import (
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func GetDatabaseConnection() (*gorm.DB, error) {
+	db, err := gorm.Open(sqlite.Open("test.db"), &gorm.Config{})
+	if err != nil {
+		return nil, err
+	}
+
+	// Migrate the schema
+	db.AutoMigrate(&Admin{}, &AccessToken{}, &Group{}, &Link{})
+
+	return db, nil
+}
diff --git a/backend/groups.go b/backend/groups.go
new file mode 100644
index 0000000..c30c2ef
--- /dev/null
+++ b/backend/groups.go
@@ -0,0 +1,32 @@
+package backend
+
+import (
+    "gorm.io/gorm"
+)
+
+type Group struct {
+	ID    uint64   `gorm:"primaryKey"`
+	Name  string `gorm:"unique,notNull"`
+	Links []Link
+}
+
+func GetGroups(db *gorm.DB) ([]Group, error) {
+    var groups []Group
+    result := db.Model(&Group{}).Preload("Links").Find(&groups)
+    if result.Error != nil {
+        return nil, result.Error
+    }
+    return groups, nil
+}
+
+func CreateGroup(db *gorm.DB, groupName string) (Group, error) {
+    group := Group{
+        Name: groupName,
+    }
+    result := db.Create(&group)
+    if result.Error != nil {
+        return Group{}, result.Error
+    }
+
+    return group, nil
+}
diff --git a/backend/links.go b/backend/links.go
new file mode 100644
index 0000000..559c59a
--- /dev/null
+++ b/backend/links.go
@@ -0,0 +1,48 @@
+package backend
+
+import (
+    "gorm.io/gorm"
+)
+
+type Link struct {
+	ID      uint64   `gorm:"primaryKey"`
+	Name    string `gorm:"notNull"`
+	Href    string `gorm:"notNull"`
+	GroupID uint64   `gorm:"notNull"`
+}
+
+func CreateLink(db *gorm.DB, linkName string, href string, groupID uint64) (Link, error) {
+    link := Link{
+        Name: linkName,
+        Href: href,
+        GroupID: groupID,
+    }
+    result := db.Create(&link)
+    if result.Error != nil {
+        return Link{}, result.Error
+    }
+
+    return link, nil
+}
+
+func UpdateLink(db *gorm.DB, id uint64, linkName string, href string) (Link, error) {
+    var link Link
+    db.First(&link, id)
+
+    link.Name = linkName
+    link.Href = href
+    result := db.Save(&link)
+    if result.Error != nil {
+        return Link{}, result.Error
+    }
+
+    return link, nil
+}
+
+func DeleteLink(db *gorm.DB, id uint64) error {
+    result := db.Delete(&Link{}, id)
+    if result.Error != nil {
+        return result.Error
+    }
+    return nil
+}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..df6b102
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,38 @@
+module github.com/ordinary-dev/phoenix
+
+go 1.20
+
+require (
+	github.com/gin-gonic/gin v1.9.0
+	gorm.io/driver/sqlite v1.4.4
+	gorm.io/gorm v1.24.6
+)
+
+require (
+	github.com/bytedance/sonic v1.8.0 // indirect
+	github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/go-playground/validator/v10 v10.11.2 // indirect
+	github.com/goccy/go-json v0.10.0 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/klauspost/cpuid/v2 v2.0.9 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.17 // indirect
+	github.com/mattn/go-sqlite3 v1.14.15 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
+	github.com/twitchyliquid64/golang-asm v0.15.1 // indirect
+	github.com/ugorji/go/codec v1.2.9 // indirect
+	golang.org/x/arch v0.0.0-20210923205945-b76863e36670 // indirect
+	golang.org/x/crypto v0.5.0 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..0a928af
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,93 @@
+github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
+github.com/bytedance/sonic v1.8.0 h1:ea0Xadu+sHlu7x5O3gKhRpQ1IKiMrSiHttPF0ybECuA=
+github.com/bytedance/sonic v1.8.0/go.mod h1:i736AoUSYt75HyZLoJW9ERYxcy6eaN6h4BZXU064P/U=
+github.com/chenzhuoyu/base64x v0.0.0-20211019084208-fb5309c8db06/go.mod h1:DH46F32mSOjUmXrMHnKwZdA8wcEefY7UVqBKYGjpdQY=
+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311 h1:qSGYFH7+jGhDF8vLC+iwCD4WpbV1EBDSzWkJODFLams=
+github.com/chenzhuoyu/base64x v0.0.0-20221115062448-fe3a3abad311/go.mod h1:b583jCggY9gE99b6G5LEC39OIiVsWj+R97kbl5odCEk=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gin-contrib/sse v0.1.0 h1:Y/yl/+YNO8GZSjAhjMsSuLt29uWRFHdHYUb5lYOV9qE=
+github.com/gin-contrib/sse v0.1.0/go.mod h1:RHrZQHXnP2xjPF+u1gW/2HnVO7nvIa9PG3Gm+fLHvGI=
+github.com/gin-gonic/gin v1.9.0 h1:OjyFBKICoexlu99ctXNR2gg+c5pKrKMuyjgARg9qeY8=
+github.com/gin-gonic/gin v1.9.0/go.mod h1:W1Me9+hsUSyj3CePGrd1/QrKJMSJ1Tu/0hFEH89961k=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.11.2 h1:q3SHpufmypg+erIExEKUmsgmhDTyhcJ38oeKGACXohU=
+github.com/go-playground/validator/v10 v10.11.2/go.mod h1:NieE624vt4SCTJtD87arVLvdmjPAeV8BQlHtMnw9D7s=
+github.com/goccy/go-json v0.10.0 h1:mXKd9Qw4NuzShiRlOXKews24ufknHO7gx30lsDyokKA=
+github.com/goccy/go-json v0.10.0/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
+github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
+github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
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+github.com/jinzhu/now v1.1.4/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
+github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
+github.com/klauspost/cpuid/v2 v2.0.9 h1:lgaqFMSdTdQYdZ04uHyN2d/eKdOMyi2YLSvlQIBFYa4=
+github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/leodido/go-urn v1.2.1 h1:BqpAaACuzVSgi/VLzGZIobT2z4v53pjosyNd9Yv6n/w=
+github.com/leodido/go-urn v1.2.1/go.mod h1:zt4jvISO2HfUBqxjfIshjdMTYS56ZS/qv49ictyFfxY=
+github.com/mattn/go-isatty v0.0.17 h1:BTarxUcIeDqL27Mc+vyvdWYSL28zpIhv3RoTdsLMPng=
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diff --git a/main.go b/main.go
new file mode 100644
index 0000000..20f58a4
--- /dev/null
+++ b/main.go
@@ -0,0 +1,194 @@
+package main
+
+import (
+    "errors"
+	"github.com/gin-gonic/gin"
+	"github.com/ordinary-dev/phoenix/backend"
+	"github.com/ordinary-dev/phoenix/views"
+	"log"
+	"net/http"
+    "strconv"
+)
+
+func main() {
+	db, err := backend.GetDatabaseConnection()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	r := gin.Default()
+	r.LoadHTMLGlob("templates/*")
+	r.Static("/assets", "./assets")
+
+    // Main page
+	r.GET("/", func(c *gin.Context) {
+		views.RequireAuth(c, db)
+        groups, err := backend.GetGroups(db)
+        if err != nil {
+            views.ShowError(c, err)
+            return
+        }
+		c.HTML(http.StatusOK, "index.html.tmpl", gin.H{
+            "groups": groups,
+        })
+	})
+
+    // Settings
+    r.GET("/settings", func(c *gin.Context) {
+        views.RequireAuth(c, db)
+        groups, err := backend.GetGroups(db)
+        if err != nil {
+            views.ShowError(c, err)
+            return
+        }
+
+        c.HTML(http.StatusOK, "settings.html.tmpl", gin.H{
+            "groups": groups,
+        })
+    })
+
+    // Create new user
+	r.POST("/users", func(c *gin.Context) {
+        // If at least 1 administator exists, require authorization
+        if backend.CountAdmins(db) > 0 {
+            tokenValue, err := c.Cookie("phoenix-token")
+
+	        // Anonymous visitor
+	        if err != nil {
+                err = errors.New("At least 1 user exists, you have to sign in first")
+                views.ShowError(c, err)
+                return
+	        }
+
+	        err = backend.ValidateToken(db, tokenValue)
+	        if err != nil {
+		        views.ShowError(c, err)
+                return
+	        }
+        }
+
+        // User is authorized or no user exists.
+        // Try to create a user.
+		username := c.PostForm("username")
+		password := c.PostForm("password")
+		admin, err := backend.CreateAdmin(db, username, password)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+
+        // Generate access token.
+		token, err := backend.CreateAccessToken(db, admin.ID)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+		backend.SetTokenCookie(c, token)
+
+        // Redirect to homepage.
+		c.Redirect(http.StatusFound, "/")
+	})
+    
+    // Create new group
+	r.POST("/groups", func(c *gin.Context) {
+        views.RequireAuth(c, db)
+
+		groupName := c.PostForm("groupName")
+		_, err := backend.CreateGroup(db, groupName)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+
+        // Redirect to settings.
+		c.Redirect(http.StatusFound, "/settings")
+	})
+    
+    // Create new link
+	r.POST("/links", func(c *gin.Context) {
+        views.RequireAuth(c, db)
+
+		linkName := c.PostForm("linkName")
+        href := c.PostForm("href")
+        groupID, err := strconv.ParseUint(c.PostForm("groupID"), 10, 32)
+        if err != nil {
+            views.ShowError(c, err)
+            return
+        }
+
+		_, err = backend.CreateLink(db, linkName, href, groupID)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+
+        // Redirect to settings.
+		c.Redirect(http.StatusFound, "/settings")
+	})
+
+    // Update link
+    r.POST("/links/:id/put", func(c *gin.Context) {
+        views.RequireAuth(c, db)
+
+        id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+        if err != nil {
+            views.ShowError(c, err)
+            return
+        }
+		linkName := c.PostForm("linkName")
+        href := c.PostForm("href")
+
+		_, err = backend.UpdateLink(db, id, linkName, href)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+
+        // Redirect to settings.
+		c.Redirect(http.StatusFound, "/settings")
+	})
+
+    // Delete link
+    r.POST("/links/:id/delete", func(c *gin.Context) {
+        views.RequireAuth(c, db)
+
+        id, err := strconv.ParseUint(c.Param("id"), 10, 64)
+        if err != nil {
+            views.ShowError(c, err)
+            return
+        }
+
+		err = backend.DeleteLink(db, id)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+
+        // Redirect to settings.
+		c.Redirect(http.StatusFound, "/settings")
+	})
+
+	r.POST("/signin", func(c *gin.Context) {
+        // Check credentials.
+		username := c.PostForm("username")
+		password := c.PostForm("password")
+		admin, err := backend.AuthorizeAdmin(db, username, password)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+
+        // Generate an access token.
+		token, err := backend.CreateAccessToken(db, admin.ID)
+		if err != nil {
+			views.ShowError(c, err)
+            return
+		}
+		backend.SetTokenCookie(c, token)
+
+        // Redirect to homepage.
+		c.Redirect(http.StatusFound, "/")
+	})
+
+	r.Run()
+}
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..e8a9272
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,7 @@
+# Phoenix
+
+Self-hosted start page without the extra stuff.
+
+## Features
+- No javascript
+- Tiny footprint
diff --git a/templates/auth.html.tmpl b/templates/auth.html.tmpl
new file mode 100644
index 0000000..1caf816
--- /dev/null
+++ b/templates/auth.html.tmpl
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        {{template "head"}}
+        <link rel="stylesheet" href="assets/auth.css" />
+    </head>
+    <body>
+        <div class="page">
+            <form action="{{.formAction}}" method="POST">
+                <h1>{{.title}}</h1>
+                <p>{{.description}}</p>
+                <input
+                    placeholder="Username"
+                    name="username"
+                    type="text"
+                    required
+                />
+                <input
+                    placeholder="Password"
+                    name="password"
+                    type="password"
+                    required
+                />
+                <button type="submit">{{.button}}</button>
+            </form>
+        </div>
+    </body>
+</html>
diff --git a/templates/error.html.tmpl b/templates/error.html.tmpl
new file mode 100644
index 0000000..df432cc
--- /dev/null
+++ b/templates/error.html.tmpl
@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        {{template "head"}}
+        <link rel="stylesheet" href="assets/error.css" />
+    </head>
+    <body>
+        <div class="page">
+            <div class="content">
+                <h1>Error</h1>
+                <code>{{.error}}</code>
+                <p>
+                    <a href="/">Main page</a>
+                </p>
+            </div>
+        </div>
+    </body>
+</html>
diff --git a/templates/head.html.tmpl b/templates/head.html.tmpl
new file mode 100644
index 0000000..cf8476d
--- /dev/null
+++ b/templates/head.html.tmpl
@@ -0,0 +1,6 @@
+{{define "head"}}
+<title>Phoenix</title>
+<meta charset="utf-8" />
+<meta name="viewport" content="width=device-width, initial-scale=1" />
+<link rel="stylesheet" href="assets/base.css" />
+{{end}}
diff --git a/templates/index.html.tmpl b/templates/index.html.tmpl
new file mode 100644
index 0000000..a6b9402
--- /dev/null
+++ b/templates/index.html.tmpl
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        {{template "head"}}
+        <link rel="stylesheet" href="assets/index.css" />
+    </head>
+    <body>
+        <div class="page">
+            <h1>Phoenix</h1>
+            {{if not .groups}}
+            <p>
+                You don't have any links.
+                Go to <a href="/settings">settings</a> and create one.
+            </p>
+            {{else}}
+            <a href="/settings">Settings</a>
+            {{end}}
+            
+            <div class="row">
+                {{range .groups}}
+                <div class="group">
+                    <h2>{{.Name}}</h2>
+                    {{range .Links}}
+                    <a href="{{.Href}}" target="_blank" rel="noreferrer">{{.Name}}</a>
+                    {{end}}
+                </div>
+                {{end}}
+            </div>
+        </div>
+    </body>
+</html>
diff --git a/templates/settings.html.tmpl b/templates/settings.html.tmpl
new file mode 100644
index 0000000..b5ca279
--- /dev/null
+++ b/templates/settings.html.tmpl
@@ -0,0 +1,93 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        {{template "head"}}
+        <link rel="stylesheet" href="assets/settings.css" />
+    </head>
+    <body>
+        <h1>Settings</h1>
+        <a href="/">Main page</a>
+
+        {{range .groups}}
+        <h2>Group "{{.Name}}"</h2>
+        <form class="row">
+            <input
+                value="{{.Name}}"
+                placeholder="Name"
+                name="groupName"
+                required
+            />
+            <button type="submit">
+                <img src="/assets/svg/floppy-disk-solid.svg" width="16px" height="16px" />
+            </button>
+        </form>
+
+        {{range .Links}}
+        <div class="row">
+        <form method="POST" action="/links/{{.ID}}/put" class="innerForm">
+            <!-- method: put -->
+            <input
+                class="link-name"
+                value="{{.Name}}"
+                name="linkName"
+                placeholder="Name"
+                required
+            />
+            <input
+                class="link-href"
+                value="{{.Href}}"
+                name="href"
+                placeholder="Href"
+                required
+            />
+            <button type="submit">
+                <img src="/assets/svg/floppy-disk-solid.svg" width="16px" height="16px" />
+            </button>
+        </form>
+        <form method="POST" action="/links/{{.ID}}/delete">
+            <button type="submit">
+                <img src="/assets/svg/trash-solid.svg" width="16px" height="16px" />
+            </button>
+        </form>
+        </div>
+        {{end}}
+
+        <form action="/links" method="POST" class="row">
+            <input
+                class="link-name"
+                placeholder="Name"
+                name="linkName"
+                required
+            />
+            <input
+                class="link-href"
+                placeholder="Href"
+                name="href"
+                type="url"
+                required
+            />
+            <input
+                type="hidden"
+                name="groupID"
+                value="{{.ID}}"
+                readonly
+            />
+            <button type="submit">
+                <img src="/assets/svg/plus-solid.svg" width="16px" height="16px" />
+            </button>
+        </form>
+        {{end}}
+
+        <h2>New group</h2>
+        <form method="POST" action="/groups" class="row">
+            <input
+                placeholder="Name"
+                name="groupName"
+                required
+            />
+            <button type="submit">
+                <img src="/assets/svg/plus-solid.svg" width="16px" height="16px" />
+            </button>
+        </form>
+    </body>
+</html>
diff --git a/views/auth.go b/views/auth.go
new file mode 100644
index 0000000..8aa441d
--- /dev/null
+++ b/views/auth.go
@@ -0,0 +1,52 @@
+package views
+
+import (
+	"github.com/gin-gonic/gin"
+	"github.com/ordinary-dev/phoenix/backend"
+	"gorm.io/gorm"
+	"net/http"
+)
+
+func ShowRegistrationForm(c *gin.Context) {
+	c.HTML(http.StatusOK, "auth.html.tmpl", gin.H{
+		"title":       "Create an account",
+		"description": "To prevent other people from seeing your links, create an account.",
+		"button":      "Create",
+		"formAction":  "/users",
+	})
+}
+
+func ShowLoginForm(c *gin.Context) {
+	c.HTML(http.StatusOK, "auth.html.tmpl", gin.H{
+		"title":       "Sign in",
+		"description": "Authorization is required to view this page.",
+		"button":      "Sign in",
+		"formAction":  "/signin",
+	})
+}
+
+// Requires the user to log in before viewing the page.
+// If successful, does nothing.
+// In case of an error, it shows the login page or the error page.
+func RequireAuth(c *gin.Context, db *gorm.DB) {
+	number_of_accounts := backend.CountAdmins(db)
+
+	// First run
+	if number_of_accounts == 0 {
+		ShowRegistrationForm(c)
+	}
+
+	tokenValue, err := c.Cookie("phoenix-token")
+
+	// Anonymous visitor
+	if err != nil {
+		ShowLoginForm(c)
+        return
+	}
+
+	err = backend.ValidateToken(db, tokenValue)
+	if err != nil {
+		ShowError(c, err)
+        return
+	}
+}
diff --git a/views/errors.go b/views/errors.go
new file mode 100644
index 0000000..b911ade
--- /dev/null
+++ b/views/errors.go
@@ -0,0 +1,16 @@
+package views
+
+import (
+	"github.com/gin-gonic/gin"
+	"net/http"
+)
+
+func ShowError(c *gin.Context, err error) {
+	c.HTML(
+		http.StatusBadRequest,
+		"error.html.tmpl",
+		gin.H{
+			"error": err.Error(),
+		},
+	)
+}