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https://github.com/opencloud-eu/opencloud.git
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ac86d9b907
Build the bleve and OpenSearch index mappings from the Go struct via reflection (json tags + per-field overrides) instead of hand-rolled mappings and hit deserializers. New mapping package: BleveBuildMapping, OpenSearchBuildMapping, Deserialize[T], PrepareForIndex; field decoding is fail-soft. Mtime is typed as a date so mtime ranges are chronological on both backends. Route CS3 facet parsing through mapping.DeserializeStringMap. The any-valued (bleve hit) and string-valued (CS3 metadata) deserializers share one generic fillStruct walker with a per-value setLeaf callback.
83 lines
2.4 KiB
Go
83 lines
2.4 KiB
Go
package mapping
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import (
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"fmt"
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"reflect"
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"strconv"
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"strings"
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"time"
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)
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// DeserializeStringsAt is DeserializeAt for a string-valued map (e.g. CS3
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// ArbitraryMetadata), parsing each string into the field's Go type via strconv/
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// time.Parse. Used to build a graph DriveItem facet. Returns nil when nothing
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// under the prefix matched.
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func DeserializeStringsAt[T any](fields map[string]string, prefix string) *T {
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t := reflect.TypeFor[T]()
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if t.Kind() != reflect.Struct {
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panic(fmt.Sprintf("mapping: DeserializeStringsAt requires a struct type, got %v", t))
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}
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out := reflect.New(t)
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// Callers pass a flat-key prefix with a trailing dot (e.g.
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// "libre.graph.audio."); fillStruct joins segments with ".", so drop it.
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if !fillStruct(out.Elem(), fields, strings.TrimSuffix(prefix, "."), setValueFromString) {
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return nil
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}
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return out.Interface().(*T)
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}
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// setValueFromString parses the string raw into v's Go type via strconv/
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// time.Parse, returning a descriptive error on failure.
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func setValueFromString(v reflect.Value, raw string) error {
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if v.Kind() == reflect.Ptr {
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alloc := reflect.New(v.Type().Elem())
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if err := setValueFromString(alloc.Elem(), raw); err != nil {
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return err
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}
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v.Set(alloc)
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return nil
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}
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if v.Type() == timeType || v.Type() == timestampType {
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t, err := time.Parse(time.RFC3339, raw)
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if err != nil {
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return fmt.Errorf("parse time %q: %w", raw, err)
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}
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setParsedTime(v, t)
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return nil
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}
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switch v.Kind() {
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case reflect.String:
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v.SetString(raw)
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return nil
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case reflect.Bool:
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b, err := strconv.ParseBool(raw)
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if err != nil {
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return fmt.Errorf("parse bool %q: %w", raw, err)
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}
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v.SetBool(b)
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return nil
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
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n, err := strconv.ParseInt(raw, 10, v.Type().Bits())
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if err != nil {
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return fmt.Errorf("parse int %q: %w", raw, err)
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}
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v.SetInt(n)
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return nil
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case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
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n, err := strconv.ParseUint(raw, 10, v.Type().Bits())
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if err != nil {
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return fmt.Errorf("parse uint %q: %w", raw, err)
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}
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v.SetUint(n)
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return nil
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case reflect.Float32, reflect.Float64:
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f, err := strconv.ParseFloat(raw, v.Type().Bits())
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if err != nil {
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return fmt.Errorf("parse float %q: %w", raw, err)
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}
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v.SetFloat(f)
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return nil
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}
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return fmt.Errorf("unsupported target kind %s", v.Kind())
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}
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