Add BatchBuilder for constructing and managing nftables batch commands

batch.go

@@ -0,0 +1,72 @@
+package nft
+
+import (
+	"fmt"
+
+	"git.kor-elf.net/kor-elf-shield/go-nftables-client/contract"
+	contractBatch "git.kor-elf.net/kor-elf-shield/go-nftables-client/contract/batch"
+	"git.kor-elf.net/kor-elf-shield/go-nftables-client/internal/batch"
+	"git.kor-elf.net/kor-elf-shield/go-nftables-client/internal/batch/chain"
+	"git.kor-elf.net/kor-elf-shield/go-nftables-client/internal/batch/rule"
+	"git.kor-elf.net/kor-elf-shield/go-nftables-client/internal/batch/table"
+	"git.kor-elf.net/kor-elf-shield/go-nftables-client/internal/pkg"
+)
+
+type batchBuilder struct {
+	command contract.CommandRun
+	file    *pkg.File
+
+	table contractBatch.Table
+	chain contractBatch.Chain
+	rule  contractBatch.Rule
+
+	isBuildBatch bool
+}
+
+func NewBatchBuilder(dir string) (contract.BatchBuilder, error) {
+	file, err := pkg.CreateRandomTmpFile(dir)
+	if err != nil {
+		return nil, err
+	}
+
+	command := batch.NewCommand(file)
+
+	return &batchBuilder{
+		command: command,
+		file:    file,
+
+		table: table.New(command),
+		chain: chain.New(command),
+		rule:  rule.New(command),
+
+		isBuildBatch: false,
+	}, nil
+}
+
+func (b *batchBuilder) Clear() error {
+	return fmt.Errorf("not implemented")
+}
+
+func (b *batchBuilder) Table() contractBatch.Table {
+	return b.table
+}
+
+func (b *batchBuilder) Chain() contractBatch.Chain {
+	return b.chain
+}
+
+func (b *batchBuilder) Rule() contractBatch.Rule {
+	return b.rule
+}
+
+func (b *batchBuilder) Build() contract.Batch {
+	b.isBuildBatch = true
+	return batch.NewBatch(b.file)
+}
+
+func (b *batchBuilder) Close() error {
+	if b.isBuildBatch {
+		return nil
+	}
+	return b.file.Remove()
+}