add relay software and version info

Co-authored-by: mr0x50 <24775431+mroxso@users.noreply.github.com>
Reviewed-on: highperfocused/lumina-relay#1

LICENSE

@@ -0,0 +1,24 @@
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <https://unlicense.org>

relay/Dockerfile

@@ -8,7 +8,7 @@
 
 ################################################################################
 # Create a stage for building the application.
-ARG GO_VERSION=1.23.4
+ARG GO_VERSION=1.24.0
 FROM --platform=$BUILDPLATFORM golang:${GO_VERSION} AS build
 WORKDIR /src
 

relay/cache/cache.go

@@ -0,0 +1,64 @@
+package cache
+
+import (
+	"sync"
+	"time"
+)
+
+type item struct {
+	value      interface{}
+	expiration int64
+}
+
+type Cache struct {
+	items map[string]item
+	mu    sync.RWMutex
+}
+
+func New() *Cache {
+	cache := &Cache{
+		items: make(map[string]item),
+	}
+	go cache.startCleanup()
+	return cache
+}
+
+func (c *Cache) Set(key string, value interface{}, duration time.Duration) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	c.items[key] = item{
+		value:      value,
+		expiration: time.Now().Add(duration).UnixNano(),
+	}
+}
+
+func (c *Cache) Get(key string) (interface{}, bool) {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	item, exists := c.items[key]
+	if !exists {
+		return nil, false
+	}
+
+	if time.Now().UnixNano() > item.expiration {
+		return nil, false
+	}
+
+	return item.value, true
+}
+
+func (c *Cache) startCleanup() {
+	ticker := time.NewTicker(time.Minute)
+	for range ticker.C {
+		c.mu.Lock()
+		now := time.Now().UnixNano()
+		for k, v := range c.items {
+			if now > v.expiration {
+				delete(c.items, k)
+			}
+		}
+		c.mu.Unlock()
+	}
+}

relay/main.go

@@ -33,6 +33,8 @@ func main() {
 	relay.Info.PubKey = getEnv("RELAY_PUBKEY", "79be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798")
 	relay.Info.Description = getEnv("RELAY_DESCRIPTION", "LUMINA Relay")
 	relay.Info.Icon = getEnv("RELAY_ICON", "https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fliquipedia.net%2Fcommons%2Fimages%2F3%2F35%2FSCProbe.jpg&f=1&nofb=1&ipt=0cbbfef25bce41da63d910e86c3c343e6c3b9d63194ca9755351bb7c2efa3359&ipo=images")
+	relay.Info.Software = "lumina-relay"
+	relay.Info.Version = "0.1.0"
 
 	// Print relay information
 	fmt.Printf("Name: %s\n", relay.Info.Name)

relay/trending/kinds.go

@@ -4,6 +4,8 @@ import (
 	"database/sql"
 	"encoding/json"
 	"time"
+
+	"git.highperfocused.tech/highperfocused/lumina-relay/relay/cache"
 )
 
 type Post struct {
@@ -16,8 +18,17 @@ type Post struct {
 	ReactionCount int        `json:"reaction_count"`
 }
 
+var (
+	trendingCache = cache.New()
+	cacheDuration = 5 * time.Minute
+)
+
 // GetTrendingKind20 returns the top 20 trending posts of kind 20 from the last 24 hours
 func GetTrendingKind20(db *sql.DB) ([]Post, error) {
+	if cached, ok := trendingCache.Get("trending_kind_20"); ok {
+		return cached.([]Post), nil
+	}
+
 	query := `
 		WITH reactions AS (
 			SELECT 
@@ -65,5 +76,6 @@ func GetTrendingKind20(db *sql.DB) ([]Post, error) {
 		trendingPosts = append(trendingPosts, post)
 	}
 
+	trendingCache.Set("trending_kind_20", trendingPosts, cacheDuration)
 	return trendingPosts, nil
 }