refactor: remove pocketbase (#1138)

app/counter/counter.go

@@ -0,0 +1,36 @@
+package counter
+
+import "sync"
+
+type Counter struct {
+	mux    sync.Mutex
+	counts map[string]int
+}
+
+func NewCounter() *Counter {
+	return &Counter{
+		counts: make(map[string]int),
+	}
+}
+
+func (c *Counter) Increment(name string) {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+
+	if _, ok := c.counts[name]; !ok {
+		c.counts[name] = 0
+	}
+
+	c.counts[name]++
+}
+
+func (c *Counter) Count(name string) int {
+	c.mux.Lock()
+	defer c.mux.Unlock()
+
+	if _, ok := c.counts[name]; !ok {
+		return 0
+	}
+
+	return c.counts[name]
+}