feat: Make STFS API public

Also: Happy new year :)

internal/check/compression.go

@@ -0,0 +1,37 @@
+package check
+
+import (
+	"github.com/pojntfx/stfs/pkg/config"
+)
+
+func CheckCompressionFormat(compressionFormat string) error {
+	compressionFormatIsKnown := false
+
+	for _, candidate := range config.KnownCompressionFormats {
+		if compressionFormat == candidate {
+			compressionFormatIsKnown = true
+		}
+	}
+
+	if !compressionFormatIsKnown {
+		return config.ErrCompressionFormatUnknown
+	}
+
+	return nil
+}
+
+func CheckCompressionLevel(compressionLevel string) error {
+	compressionLevelIsKnown := false
+
+	for _, candidate := range config.KnownCompressionLevels {
+		if compressionLevel == candidate {
+			compressionLevelIsKnown = true
+		}
+	}
+
+	if !compressionLevelIsKnown {
+		return config.ErrCompressionLevelUnknown
+	}
+
+	return nil
+}

internal/check/encryption.go

@@ -0,0 +1,19 @@
+package check
+
+import "github.com/pojntfx/stfs/pkg/config"
+
+func CheckEncryptionFormat(encryptionFormat string) error {
+	encryptionFormatIsKnown := false
+
+	for _, candidate := range config.KnownEncryptionFormats {
+		if encryptionFormat == candidate {
+			encryptionFormatIsKnown = true
+		}
+	}
+
+	if !encryptionFormatIsKnown {
+		return config.ErrEncryptionFormatUnknown
+	}
+
+	return nil
+}

internal/check/filesystem.go

@@ -0,0 +1,35 @@
+package check
+
+import "github.com/pojntfx/stfs/pkg/config"
+
+func CheckFileSystemCacheType(cacheType string) error {
+	cacheTypeIsKnown := false
+
+	for _, candidate := range config.KnownFileSystemCacheTypes {
+		if cacheType == candidate {
+			cacheTypeIsKnown = true
+		}
+	}
+
+	if !cacheTypeIsKnown {
+		return config.ErrFileSystemCacheTypeUnknown
+	}
+
+	return nil
+}
+
+func CheckWriteCacheType(cacheType string) error {
+	cacheTypeIsKnown := false
+
+	for _, candidate := range config.KnownWriteCacheTypes {
+		if cacheType == candidate {
+			cacheTypeIsKnown = true
+		}
+	}
+
+	if !cacheTypeIsKnown {
+		return config.ErrWriteCacheTypeUnknown
+	}
+
+	return nil
+}

internal/check/keys.go

@@ -0,0 +1,24 @@
+package check
+
+import (
+	"errors"
+	"os"
+
+	"github.com/pojntfx/stfs/pkg/config"
+)
+
+var (
+	ErrKeyNotAccessible = errors.New("key not found or accessible")
+)
+
+func CheckKeyAccessible(encryptionFormat string, pathToKey string) error {
+	if encryptionFormat == config.NoneKey {
+		return nil
+	}
+
+	if _, err := os.Stat(pathToKey); err != nil {
+		return ErrKeyNotAccessible
+	}
+
+	return nil
+}

internal/check/signature.go

@@ -0,0 +1,19 @@
+package check
+
+import "github.com/pojntfx/stfs/pkg/config"
+
+func CheckSignatureFormat(signatureFormat string) error {
+	signatureFormatIsKnown := false
+
+	for _, candidate := range config.KnownSignatureFormats {
+		if signatureFormat == candidate {
+			signatureFormatIsKnown = true
+		}
+	}
+
+	if !signatureFormatIsKnown {
+		return config.ErrSignatureFormatUnknown
+	}
+
+	return nil
+}