explorer-monorepo/backend/api/rest/search.go

package rest

import (
	"fmt"
	"net/http"
)

// handleSearch handles GET /api/v1/search
func (s *Server) handleSearch(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeMethodNotAllowed(w)
		return
	}
	if !s.requireDB(w) {
		return
	}

	query := r.URL.Query().Get("q")
	if query == "" {
		writeValidationError(w, fmt.Errorf("search query required"))
		return
	}

	// Validate and determine search type
	searchType, value, err := validateSearchQuery(query)
	if err != nil {
		writeValidationError(w, err)
		return
	}

	// Route to appropriate handler based on search type
	switch searchType {
	case "block":
		blockNumber, err := validateBlockNumber(value)
		if err != nil {
			writeValidationError(w, err)
			return
		}
		s.handleGetBlockByNumber(w, r, blockNumber)
	case "transaction":
		if !isValidHash(value) {
			writeValidationError(w, ErrInvalidHash)
			return
		}
		s.handleGetTransactionByHash(w, r, value)
	case "address":
		if !isValidAddress(value) {
			writeValidationError(w, ErrInvalidAddress)
			return
		}
		r.URL.RawQuery = "address=" + value
		s.handleGetAddress(w, r)
	default:
		writeValidationError(w, fmt.Errorf("unsupported search type"))
	}
}