Implement simple quote service

docs/IMPLEMENTATION.md

@@ -38,15 +38,23 @@
   - [X] Test edge cases (expired challenges, invalid HMAC, wrong difficulty)
   - [X] Performance tests for concurrent challenge operations
 
-## Phase 2: Basic Server Architecture
+## Phase 2: Quote Handler
+**Goal**: Simple quote service with public API using resty
+
+- [X] Add resty dependency to go.mod
+- [X] Create quote service package
+- [X] Implement quote fetching with HTTP client
+- [X] Add basic error handling
+
+## Phase 3: Basic Server Architecture
 - [ ] Set up dependency injection framework (wire/dig)
 - [ ] Create core interfaces and contracts
 - [ ] Set up structured logging (zerolog/logrus)
 - [ ] Set up metrics collection (prometheus)
 - [ ] Create configuration management
-- [ ] Integrate PoW package into server architecture
+- [ ] Integrate PoW and quote packages into server architecture
 
-## Phase 3: Quote Management System
+## Phase 4: Quote Management System
 - [ ] Define quote storage interface
 - [ ] Implement in-memory quote repository (fake)
 - [ ] Create quote selection service (random)
@@ -54,7 +62,7 @@
 - [ ] Add quote validation and sanitization
 - [ ] Write unit tests for quote management
 
-## Phase 4: TCP Protocol Implementation
+## Phase 5: TCP Protocol Implementation
 - [ ] Implement binary message protocol codec
 - [ ] Create protocol message types and structures
 - [ ] Implement connection handler with proper error handling
@@ -63,7 +71,7 @@
 - [ ] Implement connection lifecycle management
 - [ ] Write unit tests for protocol components
 
-## Phase 5: Server Core & Request Handling
+## Phase 6: Server Core & Request Handling
 - [ ] Implement TCP server with connection pooling
 - [ ] Create request router and handler dispatcher
 - [ ] Add connection timeout and lifecycle management
@@ -72,7 +80,7 @@
 - [ ] Create health check endpoints
 - [ ] Write integration tests for server core
 
-## Phase 6: DDOS Protection & Rate Limiting
+## Phase 7: DDOS Protection & Rate Limiting
 - [ ] Implement IP-based connection limiting
 - [ ] Create rate limiting service with time windows
 - [ ] Add automatic difficulty adjustment based on load
@@ -81,7 +89,7 @@
 - [ ] Add monitoring for attack detection
 - [ ] Write tests for protection mechanisms
 
-## Phase 7: Observability & Monitoring
+## Phase 8: Observability & Monitoring
 - [ ] Add structured logging throughout application
 - [ ] Implement metrics for key performance indicators:
   - [ ] Active connections count
@@ -93,7 +101,7 @@
 - [ ] Add error categorization and reporting
 - [ ] Implement health check endpoints
 
-## Phase 8: Configuration & Environment Setup
+## Phase 9: Configuration & Environment Setup
 - [ ] Create configuration structure with validation
 - [ ] Support environment variables and config files
 - [ ] Add configuration for different environments (dev/prod)
@@ -101,7 +109,7 @@
 - [ ] Create deployment configuration templates
 - [ ] Add configuration validation and defaults
 
-## Phase 9: Client Implementation
+## Phase 10: Client Implementation
 - [ ] Create client application structure
 - [ ] Implement PoW solver algorithm
 - [ ] Create client-side protocol implementation
@@ -111,7 +119,7 @@
 - [ ] Add client metrics and logging
 - [ ] Write client unit and integration tests
 
-## Phase 10: Docker & Deployment
+## Phase 11: Docker & Deployment
 - [ ] Create multi-stage Dockerfile for server
 - [ ] Create Dockerfile for client
 - [ ] Create docker-compose.yml for local development
@@ -120,7 +128,7 @@
 - [ ] Add environment-specific configurations
 - [ ] Create deployment documentation
 
-## Phase 11: Testing & Quality Assurance
+## Phase 12: Testing & Quality Assurance
 - [ ] Write comprehensive unit tests (>80% coverage):
   - [ ] PoW algorithm tests
   - [ ] Protocol handler tests
@@ -135,7 +143,7 @@
 - [ ] Add benchmark tests for performance validation
 - [ ] Create stress testing scenarios
 
-## Phase 12: Documentation & Final Polish
+## Phase 13: Documentation & Final Polish
 - [ ] Write comprehensive README with setup instructions
 - [ ] Create API documentation for all interfaces
 - [ ] Add inline code documentation
@@ -144,7 +152,7 @@
 - [ ] Add performance tuning recommendations
 - [ ] Create monitoring and alerting guide
 
-## Phase 13: Production Readiness Checklist
+## Phase 14: Production Readiness Checklist
 - [ ] Security audit of all components
 - [ ] Performance benchmarking and optimization
 - [ ] Memory leak detection and prevention

internal/quotes/service.go

@@ -0,0 +1,46 @@
+package quotes
+
+import (
+	"context"
+	"fmt"
+	"github.com/go-resty/resty/v2"
+)
+
+type HTTPService struct {
+	client *resty.Client
+}
+
+func NewHTTPService() *HTTPService {
+	return &HTTPService{
+		client: resty.New(),
+	}
+}
+
+func (s *HTTPService) GetRandomQuote(ctx context.Context) (*Quote, error) {
+	var response []struct {
+		Q string `json:"q"`
+		A string `json:"a"`
+	}
+
+	resp, err := s.client.R().
+		SetContext(ctx).
+		SetResult(&response).
+		Get("https://zenquotes.io/api/random")
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to fetch quote: %w", err)
+	}
+
+	if resp.IsError() {
+		return nil, fmt.Errorf("API error: %s", resp.Status())
+	}
+
+	if len(response) == 0 {
+		return nil, fmt.Errorf("no quotes returned from API")
+	}
+
+	return &Quote{
+		Text:   response[0].Q,
+		Author: response[0].A,
+	}, nil
+}

internal/quotes/types.go

@@ -0,0 +1,12 @@
+package quotes
+
+import "context"
+
+type Quote struct {
+	Text   string `json:"text"`
+	Author string `json:"author"`
+}
+
+type Service interface {
+	GetRandomQuote(ctx context.Context) (*Quote, error)
+}