v0.13.1 folder restructure, test script added, format adapter async fix

internal/filter/chain.go

@@ -0,0 +1,82 @@
+package filter
+
+import (
+	"fmt"
+	"sync/atomic"
+
+	"logwisp/internal/config"
+	"logwisp/internal/core"
+
+	"github.com/lixenwraith/log"
+)
+
+// Chain manages a sequence of filters, applying them in order
+type Chain struct {
+	filters []*Filter
+	logger  *log.Logger
+
+	// Statistics
+	totalProcessed atomic.Uint64
+	totalPassed    atomic.Uint64
+}
+
+// NewChain creates a new filter chain from a slice of filter configurations
+func NewChain(configs []config.FilterConfig, logger *log.Logger) (*Chain, error) {
+	chain := &Chain{
+		filters: make([]*Filter, 0, len(configs)),
+		logger:  logger,
+	}
+
+	for i, cfg := range configs {
+		filter, err := NewFilter(cfg, logger)
+		if err != nil {
+			return nil, fmt.Errorf("filter[%d]: %w", i, err)
+		}
+		chain.filters = append(chain.filters, filter)
+	}
+
+	logger.Info("msg", "Filter chain created",
+		"component", "filter_chain",
+		"filter_count", len(configs))
+	return chain, nil
+}
+
+// Apply runs a log entry through all filters in the chain
+func (c *Chain) Apply(entry core.LogEntry) bool {
+	c.totalProcessed.Add(1)
+
+	// No filters means pass everything
+	if len(c.filters) == 0 {
+		c.totalPassed.Add(1)
+		return true
+	}
+
+	// All filters must pass
+	for i, filter := range c.filters {
+		if !filter.Apply(entry) {
+			c.logger.Debug("msg", "Entry filtered out",
+				"component", "filter_chain",
+				"filter_index", i,
+				"filter_type", filter.config.Type)
+			return false
+		}
+	}
+
+	c.totalPassed.Add(1)
+	return true
+}
+
+// GetStats returns aggregated statistics for the entire chain
+func (c *Chain) GetStats() map[string]any {
+	filterStats := make([]map[string]any, len(c.filters))
+	for i, filter := range c.filters {
+		filterStats[i] = filter.GetStats()
+	}
+
+	return map[string]any{
+		"filter_count":    len(c.filters),
+		"total_processed": c.totalProcessed.Load(),
+		"total_passed":    c.totalPassed.Load(),
+		"filters":         filterStats,
+	}
+}