Add 'ParseString' to the utils. Refactor enums of the 'ConfigFile'.

.golangci.yml

@@ -59,7 +59,6 @@ linters:
         - inamedparam
         - interfacebloat
         - intrange
-        - ireturn
         - loggercheck
         - makezero
         - mirror
@@ -110,6 +109,7 @@ linters:
                   - perfsprint
                   - errcheck
                   - gosec
+                  - gocyclo
 
             - path: _test\.go$
               linters:

pkg/config/cli.go

@@ -187,7 +187,7 @@ func (parser *ConfigCLIParser) Parse() (*Config, error) {
 						fieldParseErrors,
 						*types.NewFieldParseError(
 							"config-file",
-							fmt.Errorf("file type '%s' not supported (supported types: %s)", err.Type, types.ConfigFileTypeYAML.String()),
+							fmt.Errorf("file type '%s' not supported (supported types: %s)", err.Type, types.ConfigFileTypeYAML),
 						),
 					)
 					return nil

pkg/types/config_file.go

@@ -6,39 +6,19 @@ import (
 	"strings"
 )
 
-type ConfigFileType int
+type ConfigFileType string
 
 const (
-	ConfigFileTypeYAML ConfigFileType = iota
+	ConfigFileTypeYAML ConfigFileType = "yaml/yml"
 )
 
-func (t ConfigFileType) String() string {
+type ConfigFileLocationType string
-	switch t {
-	case ConfigFileTypeYAML:
-		return "yaml/yml"
-	default:
-		return "unknown"
-	}
-}
-
-type ConfigFileLocationType int
 
 const (
-	ConfigFileLocationLocal ConfigFileLocationType = iota
+	ConfigFileLocationLocal  ConfigFileLocationType = "local"
-	ConfigFileLocationRemote
+	ConfigFileLocationRemote ConfigFileLocationType = "remote"
 )
 
-func (l ConfigFileLocationType) String() string {
-	switch l {
-	case ConfigFileLocationLocal:
-		return "local"
-	case ConfigFileLocationRemote:
-		return "remote"
-	default:
-		return "unknown"
-	}
-}
-
 type ConfigFile struct {
 	path         string
 	_type        ConfigFileType

pkg/types/config_file_test.go

@@ -7,35 +7,6 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-func TestConfigFileType_String(t *testing.T) {
-	t.Run("ConfigFileTypeYAML returns yaml", func(t *testing.T) {
-		configType := ConfigFileTypeYAML
-		assert.Equal(t, "yaml/yml", configType.String())
-	})
-
-	t.Run("Unknown config file type returns unknown", func(t *testing.T) {
-		configType := ConfigFileType(999)
-		assert.Equal(t, "unknown", configType.String())
-	})
-}
-
-func TestConfigFileLocationType_String(t *testing.T) {
-	t.Run("ConfigFileLocationLocal returns local", func(t *testing.T) {
-		locationType := ConfigFileLocationLocal
-		assert.Equal(t, "local", locationType.String())
-	})
-
-	t.Run("ConfigFileLocationRemote returns remote", func(t *testing.T) {
-		locationType := ConfigFileLocationRemote
-		assert.Equal(t, "remote", locationType.String())
-	})
-
-	t.Run("Unknown location type returns unknown", func(t *testing.T) {
-		locationType := ConfigFileLocationType(999)
-		assert.Equal(t, "unknown", locationType.String())
-	})
-}
-
 func TestConfigFile_String(t *testing.T) {
 	t.Run("String returns the file path", func(t *testing.T) {
 		configFile := ConfigFile{path: "/path/to/config.yaml"}

pkg/utils/parse.go

@@ -0,0 +1,111 @@
+package utils
+
+import (
+	"fmt"
+	"net/url"
+	"strconv"
+	"time"
+)
+
+// ParseString attempts to parse the input string `s` into a value of the specified type T.
+// If parsing the string `s` fails for a supported type, it returns the zero value of T
+// and the parsing error.
+// /nolint:forcetypeassert,wrapcheck
+func ParseString[
+	T string | int | int8 | int16 | int32 | int64 | uint | uint8 | uint16 | uint32 | uint64 | float64 | bool | time.Duration | url.URL,
+](rawValue string) (T, error) {
+	var value T
+
+	switch any(value).(type) {
+	case int:
+		i, err := strconv.Atoi(rawValue)
+		if err != nil {
+			return value, err
+		}
+		value = any(i).(T)
+	case int8:
+		i, err := strconv.ParseInt(rawValue, 10, 8)
+		if err != nil {
+			return value, err
+		}
+		value = any(int8(i)).(T)
+	case int16:
+		i, err := strconv.ParseInt(rawValue, 10, 16)
+		if err != nil {
+			return value, err
+		}
+		value = any(int16(i)).(T)
+	case int32:
+		i, err := strconv.ParseInt(rawValue, 10, 32)
+		if err != nil {
+			return value, err
+		}
+		value = any(int32(i)).(T)
+	case int64:
+		i, err := strconv.ParseInt(rawValue, 10, 64)
+		if err != nil {
+			return value, err
+		}
+		value = any(i).(T)
+	case uint:
+		u, err := strconv.ParseUint(rawValue, 10, 0)
+		if err != nil {
+			return value, err
+		}
+		value = any(uint(u)).(T)
+	case uint8:
+		u, err := strconv.ParseUint(rawValue, 10, 8)
+		if err != nil {
+			return value, err
+		}
+		value = any(uint8(u)).(T)
+	case uint16:
+		u, err := strconv.ParseUint(rawValue, 10, 16)
+		if err != nil {
+			return value, err
+		}
+		value = any(uint16(u)).(T)
+	case uint32:
+		u, err := strconv.ParseUint(rawValue, 10, 32)
+		if err != nil {
+			return value, err
+		}
+		value = any(uint32(u)).(T)
+	case uint64:
+		u, err := strconv.ParseUint(rawValue, 10, 64)
+		if err != nil {
+			return value, err
+		}
+		value = any(u).(T)
+	case float64:
+		f, err := strconv.ParseFloat(rawValue, 64)
+		if err != nil {
+			return value, err
+		}
+		value = any(f).(T)
+	case bool:
+		b, err := strconv.ParseBool(rawValue)
+		if err != nil {
+			return value, err
+		}
+		value = any(b).(T)
+	case string:
+		value = any(rawValue).(T)
+	case time.Duration:
+		d, err := time.ParseDuration(rawValue)
+		if err != nil {
+			return value, err
+		}
+		value = any(d).(T)
+	case url.URL:
+		u, err := url.Parse(rawValue)
+		if err != nil {
+			return value, err
+		}
+		value = any(*u).(T)
+	default:
+		return value, fmt.Errorf("unsupported type: %T", value)
+	}
+
+	return value, nil
+}

pkg/utils/parse_test.go

@@ -0,0 +1,528 @@
+package utils
+
+import (
+	"net/url"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseString(t *testing.T) {
+	t.Run("ParseString to string", func(t *testing.T) {
+		tests := []struct {
+			name     string
+			input    string
+			expected string
+		}{
+			{"empty string", "", ""},
+			{"simple string", "hello", "hello"},
+			{"string with spaces", "hello world", "hello world"},
+			{"numeric string", "123", "123"},
+			{"special characters", "!@#$%^&*()", "!@#$%^&*()"},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[string](test.input)
+				require.NoError(t, err)
+				assert.Equal(t, test.expected, result)
+			})
+		}
+	})
+
+	t.Run("ParseString to int", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    int
+			expectError bool
+		}{
+			{"positive int", "42", 42, false},
+			{"negative int", "-42", -42, false},
+			{"zero", "0", 0, false},
+			{"invalid int", "abc", 0, true},
+			{"float string", "3.14", 0, true},
+			{"empty string", "", 0, true},
+			{"overflow string", "99999999999999999999", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[int](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to int8", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    int8
+			expectError bool
+		}{
+			{"valid int8", "127", 127, false},
+			{"min int8", "-128", -128, false},
+			{"overflow int8", "128", 0, true},
+			{"underflow int8", "-129", 0, true},
+			{"invalid", "abc", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[int8](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to int16", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    int16
+			expectError bool
+		}{
+			{"valid int16", "32767", 32767, false},
+			{"min int16", "-32768", -32768, false},
+			{"overflow int16", "32768", 0, true},
+			{"underflow int16", "-32769", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[int16](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to int32", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    int32
+			expectError bool
+		}{
+			{"valid int32", "2147483647", 2147483647, false},
+			{"min int32", "-2147483648", -2147483648, false},
+			{"overflow int32", "2147483648", 0, true},
+			{"underflow int32", "-2147483649", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[int32](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to int64", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    int64
+			expectError bool
+		}{
+			{"valid int64", "9223372036854775807", 9223372036854775807, false},
+			{"min int64", "-9223372036854775808", -9223372036854775808, false},
+			{"large number", "123456789012345", 123456789012345, false},
+			{"invalid", "not a number", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[int64](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to uint", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    uint
+			expectError bool
+		}{
+			{"valid uint", "42", 42, false},
+			{"zero", "0", 0, false},
+			{"large uint", "4294967295", 4294967295, false},
+			{"negative", "-1", 0, true},
+			{"invalid", "abc", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[uint](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to uint8", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    uint8
+			expectError bool
+		}{
+			{"valid uint8", "255", 255, false},
+			{"min uint8", "0", 0, false},
+			{"overflow uint8", "256", 0, true},
+			{"negative", "-1", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[uint8](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to uint16", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    uint16
+			expectError bool
+		}{
+			{"valid uint16", "65535", 65535, false},
+			{"min uint16", "0", 0, false},
+			{"overflow uint16", "65536", 0, true},
+			{"negative", "-1", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[uint16](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to uint32", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    uint32
+			expectError bool
+		}{
+			{"valid uint32", "4294967295", 4294967295, false},
+			{"min uint32", "0", 0, false},
+			{"overflow uint32", "4294967296", 0, true},
+			{"negative", "-1", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[uint32](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to uint64", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    uint64
+			expectError bool
+		}{
+			{"valid uint64", "18446744073709551615", 18446744073709551615, false},
+			{"min uint64", "0", 0, false},
+			{"large number", "123456789012345", 123456789012345, false},
+			{"negative", "-1", 0, true},
+			{"invalid", "not a number", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[uint64](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to float64", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    float64
+			expectError bool
+		}{
+			{"integer", "42", 42.0, false},
+			{"decimal", "3.14159", 3.14159, false},
+			{"negative", "-2.5", -2.5, false},
+			{"scientific notation", "1.23e10", 1.23e10, false},
+			{"zero", "0", 0.0, false},
+			{"invalid", "not a number", 0, true},
+			{"empty", "", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[float64](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.InDelta(t, test.expected, result, 0.0001)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to bool", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    bool
+			expectError bool
+		}{
+			{"true lowercase", "true", true, false},
+			{"True mixed case", "True", true, false},
+			{"TRUE uppercase", "TRUE", true, false},
+			{"1 as true", "1", true, false},
+			{"false lowercase", "false", false, false},
+			{"False mixed case", "False", false, false},
+			{"FALSE uppercase", "FALSE", false, false},
+			{"0 as false", "0", false, false},
+			{"invalid", "yes", false, true},
+			{"empty", "", false, true},
+			{"numeric non-binary", "2", false, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[bool](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to time.Duration", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			expected    time.Duration
+			expectError bool
+		}{
+			{"seconds", "10s", 10 * time.Second, false},
+			{"minutes", "5m", 5 * time.Minute, false},
+			{"hours", "2h", 2 * time.Hour, false},
+			{"combined", "1h30m45s", time.Hour + 30*time.Minute + 45*time.Second, false},
+			{"milliseconds", "500ms", 500 * time.Millisecond, false},
+			{"microseconds", "100us", 100 * time.Microsecond, false},
+			{"nanoseconds", "50ns", 50 * time.Nanosecond, false},
+			{"negative", "-5s", -5 * time.Second, false},
+			{"invalid", "5x", 0, true},
+			{"empty", "", 0, true},
+			{"no unit", "100", 0, true},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[time.Duration](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					assert.Equal(t, test.expected, result)
+				}
+			})
+		}
+	})
+
+	t.Run("ParseString to url.URL", func(t *testing.T) {
+		tests := []struct {
+			name        string
+			input       string
+			checkFunc   func(t *testing.T, u url.URL)
+			expectError bool
+		}{
+			{
+				name:  "http URL",
+				input: "http://example.com",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Equal(t, "http", u.Scheme)
+					assert.Equal(t, "example.com", u.Host)
+				},
+				expectError: false,
+			},
+			{
+				name:  "https URL with path",
+				input: "https://example.com/path/to/resource",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Equal(t, "https", u.Scheme)
+					assert.Equal(t, "example.com", u.Host)
+					assert.Equal(t, "/path/to/resource", u.Path)
+				},
+				expectError: false,
+			},
+			{
+				name:  "URL with query parameters",
+				input: "https://example.com/search?q=test&page=1",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Equal(t, "https", u.Scheme)
+					assert.Equal(t, "example.com", u.Host)
+					assert.Equal(t, "/search", u.Path)
+					assert.Equal(t, "q=test&page=1", u.RawQuery)
+				},
+				expectError: false,
+			},
+			{
+				name:  "URL with port",
+				input: "http://localhost:8080/api",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Equal(t, "http", u.Scheme)
+					assert.Equal(t, "localhost:8080", u.Host)
+					assert.Equal(t, "/api", u.Path)
+				},
+				expectError: false,
+			},
+			{
+				name:  "URL with fragment",
+				input: "https://example.com/page#section",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Equal(t, "https", u.Scheme)
+					assert.Equal(t, "example.com", u.Host)
+					assert.Equal(t, "/page", u.Path)
+					assert.Equal(t, "section", u.Fragment)
+				},
+				expectError: false,
+			},
+			{
+				name:  "relative path",
+				input: "/path/to/resource",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Empty(t, u.Scheme)
+					assert.Empty(t, u.Host)
+					assert.Equal(t, "/path/to/resource", u.Path)
+				},
+				expectError: false,
+			},
+			{
+				name:  "empty string",
+				input: "",
+				checkFunc: func(t *testing.T, u url.URL) {
+					t.Helper()
+					assert.Empty(t, u.String())
+				},
+				expectError: false,
+			},
+		}
+
+		for _, test := range tests {
+			t.Run(test.name, func(t *testing.T) {
+				result, err := ParseString[url.URL](test.input)
+				if test.expectError {
+					assert.Error(t, err)
+				} else {
+					require.NoError(t, err)
+					if test.checkFunc != nil {
+						test.checkFunc(t, result)
+					}
+				}
+			})
+		}
+	})
+
+	t.Run("Edge cases", func(t *testing.T) {
+		t.Run("whitespace handling for numeric types", func(t *testing.T) {
+			result, err := ParseString[int]("  42  ")
+			require.Error(t, err)
+			assert.Equal(t, 0, result)
+		})
+
+		t.Run("leading zeros for int", func(t *testing.T) {
+			result, err := ParseString[int]("007")
+			require.NoError(t, err)
+			assert.Equal(t, 7, result)
+		})
+
+		t.Run("plus sign for positive numbers", func(t *testing.T) {
+			result, err := ParseString[int]("+42")
+			require.NoError(t, err)
+			assert.Equal(t, 42, result)
+		})
+
+		t.Run("case sensitivity for bool", func(t *testing.T) {
+			testCases := []string{"t", "T", "f", "F"}
+			for _, tc := range testCases {
+				result, err := ParseString[bool](tc)
+				require.NoError(t, err)
+				if tc == "t" || tc == "T" {
+					assert.True(t, result)
+				} else {
+					assert.False(t, result)
+				}
+			}
+		})
+	})
+}