Initial commit

.github/workflows/go.yml

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+# This workflow will build a golang project
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-go
+
+name: Go
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+jobs:
+
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v3
+        with:
+          go-version: 1.21
+
+      - name: Test
+        run: make test
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v3
+        with:
+          files: ./coverage

.gitignore

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+# If you prefer the allow list template instead of the deny list, see community template:
+# https://github.com/github/gitignore/blob/main/community/Golang/Go.AllowList.gitignore
+#
+# Binaries for programs and plugins
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+
+# Test binary, built with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+# Dependency directories (remove the comment below to include it)
+# vendor/
+
+# Go workspace file
+go.work
+coverage.coverprofile

LICENSE

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+MIT License
+
+Copyright (c) 2024
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

Makefile

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+.PHONY: test
+
+test:
+	@echo "##### Running tests"
+	go test -race -cover -coverprofile=coverage -covermode=atomic -v ./...

README.md

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+# go-urlvalues #
+
+![Test Status](https://github.com/vcraescu/go-urlvalues/actions/workflows/go.yml/badge.svg)
+[![codecov](https://codecov.io/github/vcraescu/go-urlvalues/branch/master/graph/badge.svg)](https://codecov.io/github/vcraescu/go-urlvalues)
+
+Go library that provides a simple and flexible way to encode Go values into URL query parameters. It
+offers a customizable interface to marshal various data types, including maps, slices, structs, and more.
+
+## Usage
+
+```bash
+go get -u github.com/vcraescu/go-urlvalues
+```
+
+## Marshaler
+
+### Features
+
+- Encode Go values (structs and maps) into URL query parameters.
+- Support for encoding maps, slices, structs, and other data types.
+- Configurable options for customizing the marshaling process.
+
+### Marshaler Interface
+
+```
+type Marshaler interface {
+	EncodeValues(key string, values *url.Values) error
+}
+```
+
+Implement the `EncodeValues` method in your custom types to provide specific encoding logic.
+
+### Custom Options
+
+#### MarshalOptions
+
+* `ArrayBrackets`: Add brackets to array/slice keys in the URL parameters.
+* `Delimiter`: Specify a custom delimiter for joining slice values in the URL parameters.
+
+Example:
+
+```
+values, err := urlvalues.Marshal(data, func(opts *urlvalues.MarshalOptions) {
+        opts.ArrayBrackets = true
+        opts.Delimiter = "|"
+})
+```
+
+### Example
+
+```go
+package main
+
+import (
+	"fmt"
+	"github.com/vcraescu/go-urlvalues"
+)
+
+func main() {
+	type Object struct {
+		Slice  []int  `url:"slice"`
+		String string `url:"string"`
+	}
+
+	m := map[string]any{
+		"slice": []string{"100", "200"},
+		"int":   1,
+		"map": map[string]any{
+			"slice": []string{"100", "200"},
+			"int":   1,
+		},
+		"object": Object{
+			Slice:  []int{1, 2},
+			String: "example",
+		},
+	}
+
+	values, err := urlvalues.Marshal(m)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(values.Encode())
+	// Output: int=1&map%5Bint%5D=1&map%5Bslice%5D=100&map%5Bslice%5D=200&object%5Bslice%5D=1&object%5Bslice%5D=2&object%5Bstring%5D=example&slice=100&slice=200
+}
+```
+
+## Credits
+
+This project utilizes the [google/go-querystring](https://github.com/google/go-querystring) library for encoding structs 
+to URL.
+
+## License
+
+This library is licensed under the MIT License - see the [LICENSE](LICENSE) file for details.
+

example_test.go

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+package urlvalues_test
+
+import (
+	"fmt"
+	"github.com/vcraescu/go-urlvalues"
+)
+
+func ExampleMarshal() {
+	type Object struct {
+		Slice  []int  `url:"slice"`
+		String string `url:"string"`
+	}
+
+	m := map[string]any{
+		"slice": []string{"100", "200"},
+		"int":   1,
+		"map": map[string]any{
+			"slice": []string{"100", "200"},
+			"int":   1,
+		},
+		"object": Object{
+			Slice:  []int{1, 2},
+			String: "example",
+		},
+	}
+
+	values, err := urlvalues.Marshal(m)
+	if err != nil {
+		panic(err)
+	}
+
+	fmt.Println(values.Encode())
+	// Output: int=1&map%5Bint%5D=1&map%5Bslice%5D=100&map%5Bslice%5D=200&object%5Bslice%5D=1&object%5Bslice%5D=2&object%5Bstring%5D=example&slice=100&slice=200
+}

go.mod

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+module github.com/vcraescu/go-urlvalues
+
+go 1.21
+
+require (
+	github.com/google/go-querystring v1.1.0
+	github.com/stretchr/testify v1.8.4
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

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+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/google/go-cmp v0.5.2 h1:X2ev0eStA3AbceY54o37/0PQ/UWqKEiiO2dKL5OPaFM=
+github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
+github.com/google/go-querystring v1.1.0 h1:AnCroh3fv4ZBgVIf1Iwtovgjaw/GiKJo8M8yD/fhyJ8=
+github.com/google/go-querystring v1.1.0/go.mod h1:Kcdr2DB4koayq7X8pmAG4sNG59So17icRSOU623lUBU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/reflect.go

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+package internal
+
+import (
+	"fmt"
+	"reflect"
+)
+
+type zeroable interface {
+	IsZero() bool
+}
+
+func Indirect(v reflect.Value) reflect.Value {
+	for v.Kind() == reflect.Ptr {
+		if v.IsNil() {
+			return v
+		}
+
+		v = v.Elem()
+	}
+
+	return v
+}
+
+func IsZero(v reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	default:
+		if !v.IsValid() {
+			return true
+		}
+
+		if a, ok := v.Interface().(zeroable); ok {
+			return a.IsZero()
+		}
+	}
+
+	return false
+}
+
+func StringValueMap(v reflect.Value) map[string]reflect.Value {
+	iter := v.MapRange()
+	out := make(map[string]reflect.Value)
+
+	for iter.Next() {
+		mv := reflect.ValueOf(iter.Value().Interface())
+
+		if !mv.IsValid() {
+			continue
+		}
+
+		out[ValueString(iter.Key())] = mv
+	}
+
+	return out
+}
+
+func ValueString(v reflect.Value) string {
+	if IsZero(v) {
+		return ""
+	}
+
+	return fmt.Sprint(v.Interface())
+}
+
+func SliceValues(v reflect.Value) []reflect.Value {
+	out := make([]reflect.Value, 0, v.Len())
+
+	for i := 0; i < v.Len(); i++ {
+		out = append(out, v.Index(i))
+	}
+
+	return out
+}
+
+func IsKind(v reflect.Value, kinds ...reflect.Kind) error {
+	for _, kind := range kinds {
+		if v.Kind() == kind {
+			return nil
+		}
+	}
+
+	return fmt.Errorf("expected one of %q but got %q", kinds, v.Kind())
+}

internal/url.go

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+package internal
+
+import "net/url"
+
+func MergeURLValues(dst url.Values, src url.Values, scope string) {
+	for k, v := range src {
+		if scope != "" {
+			k = scope + "[" + k + "]"
+		}
+
+		for _, s := range v {
+			dst.Add(k, s)
+		}
+	}
+}