62 lines
1.8 KiB
Go
62 lines
1.8 KiB
Go
package contract
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import (
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"bytes"
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"fmt"
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"path"
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"strings"
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"sync"
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"git.ipao.vip/rogee/go-sip/contracts"
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"github.com/santhosh-tekuri/jsonschema/v6"
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)
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var compiledSchemas sync.Map
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type bundleLoader struct{ version string }
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func (l bundleLoader) base() string {
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return "https://go-sip.local/contracts/" + l.version + "/"
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}
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// Load never accesses the network or resolves references against another bundle.
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func (l bundleLoader) Load(address string) (any, error) {
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if !strings.HasPrefix(address, l.base()) {
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return nil, fmt.Errorf("schema reference outside pinned bundle: %s", address)
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}
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name := strings.TrimPrefix(address, l.base())
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if name == "" || path.Base(name) != name || !strings.HasSuffix(name, ".schema.json") {
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return nil, fmt.Errorf("invalid schema resource name %q", name)
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}
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raw, err := contracts.Files.ReadFile("upstream/" + l.version + "/" + name)
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if err != nil {
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return nil, fmt.Errorf("read pinned schema %s: %w", name, err)
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}
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return jsonschema.UnmarshalJSON(bytes.NewReader(raw))
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}
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func schemaFromBundle(version, name string) (*jsonschema.Schema, error) {
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key := version + "/" + name
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if cached, ok := compiledSchemas.Load(key); ok {
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return cached.(*jsonschema.Schema), nil
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}
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loader := bundleLoader{version: version}
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resource := loader.base() + name
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doc, err := loader.Load(resource)
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if err != nil {
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return nil, err
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}
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compiler := jsonschema.NewCompiler()
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compiler.UseLoader(loader)
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compiler.AssertFormat()
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if err := compiler.AddResource(resource, doc); err != nil {
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return nil, fmt.Errorf("register %s: %w", name, err)
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}
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schema, err := compiler.Compile(resource)
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if err != nil {
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return nil, fmt.Errorf("compile %s: %w", name, err)
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}
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actual, _ := compiledSchemas.LoadOrStore(key, schema)
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return actual.(*jsonschema.Schema), nil
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}
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