Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/metrics/collector.go

@@ -0,0 +1,73 @@
+package metrics
+
+import (
+	"context"
+	"fmt"
+	"time"
+)
+
+// Collector collects and exposes metrics
+type Collector struct {
+	metrics map[string]Metric
+}
+
+// NewCollector creates a new metrics collector
+func NewCollector() *Collector {
+	return &Collector{
+		metrics: make(map[string]Metric),
+	}
+}
+
+// Metric represents a metric
+type Metric struct {
+	Name      string
+	Value     float64
+	Type      string // "counter", "gauge", "histogram"
+	Labels    map[string]string
+	Timestamp time.Time
+}
+
+// IncrementCounter increments a counter metric
+func (c *Collector) IncrementCounter(ctx context.Context, name string, labels map[string]string) {
+	key := c.metricKey(name, labels)
+	if metric, ok := c.metrics[key]; ok {
+		metric.Value++
+		metric.Timestamp = time.Now()
+		c.metrics[key] = metric
+	} else {
+		c.metrics[key] = Metric{
+			Name:      name,
+			Value:     1,
+			Type:      "counter",
+			Labels:    labels,
+			Timestamp: time.Now(),
+		}
+	}
+}
+
+// SetGauge sets a gauge metric
+func (c *Collector) SetGauge(ctx context.Context, name string, value float64, labels map[string]string) {
+	key := c.metricKey(name, labels)
+	c.metrics[key] = Metric{
+		Name:      name,
+		Value:     value,
+		Type:      "gauge",
+		Labels:    labels,
+		Timestamp: time.Now(),
+	}
+}
+
+// GetMetrics gets all metrics
+func (c *Collector) GetMetrics() map[string]Metric {
+	return c.metrics
+}
+
+// metricKey creates a key for a metric
+func (c *Collector) metricKey(name string, labels map[string]string) string {
+	key := name
+	for k, v := range labels {
+		key += fmt.Sprintf(":%s=%s", k, v)
+	}
+	return key
+}
+