From a30ef6b27e578a4cf0a674b24f5b52b4c1516c63 Mon Sep 17 00:00:00 2001
From: Jeroen Wijenbergh <jeroen.wijenbergh@geant.org>
Date: Thu, 12 Feb 2026 12:34:08 +0100
Subject: All: Rename packages that sound useless or clash with std

---
 internal/eduvpnapi/cache.go | 67 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 internal/eduvpnapi/cache.go

(limited to 'internal/eduvpnapi/cache.go')

diff --git a/internal/eduvpnapi/cache.go b/internal/eduvpnapi/cache.go
new file mode 100644
index 0000000..d3e2b77
--- /dev/null
+++ b/internal/eduvpnapi/cache.go
@@ -0,0 +1,67 @@
+package eduvpnapi
+
+import (
+	"context"
+	"net/http"
+	"sync"
+	"time"
+
+	"codeberg.org/eduVPN/eduvpn-common/internal/eduvpnapi/endpoints"
+)
+
+// EndpointCache is a struct that caches well-known API endpoints
+type EndpointCache struct {
+	lastUpdate map[string]time.Time
+	lastEP     map[string]*endpoints.Endpoints
+	mu         sync.Mutex
+}
+
+// Get returns a cached or fresh endpoint cache copy
+func (ec *EndpointCache) Get(ctx context.Context, wk string, transport http.RoundTripper) (*endpoints.Endpoints, error) {
+	ec.mu.Lock()
+	defer ec.mu.Unlock()
+
+	// get the last update time
+	lu := time.Time{}
+	if v, ok := ec.lastUpdate[wk]; ok {
+		lu = v
+	}
+
+	// if not 10 minutes have passed, return cached copy
+	if !lu.IsZero() && !time.Now().After(lu.Add(10*time.Minute)) {
+		v, ok := ec.lastEP[wk]
+		if ok {
+			return v, nil
+		}
+	}
+
+	// get fresh API endpoints
+	ep, err := getEndpoints(ctx, wk, transport)
+	if err != nil {
+		return nil, err
+	}
+
+	// update endpoints
+	ec.lastUpdate[wk] = time.Now()
+	ec.lastEP[wk] = ep
+
+	return ep, nil
+}
+
+var (
+	epCache     *EndpointCache
+	epCacheOnce sync.Once
+)
+
+// GetEndpointCache returns the global singleton endpoint cache
+// or creates one if it does not exist
+func GetEndpointCache() *EndpointCache {
+	epCacheOnce.Do(func() {
+		epCache = &EndpointCache{
+			lastUpdate: make(map[string]time.Time),
+			lastEP:     make(map[string]*endpoints.Endpoints),
+		}
+	})
+
+	return epCache
+}
-- 
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