0.3.49

server/internal/api/home_row_layout.go

@@ -0,0 +1,78 @@
+package api
+
+import (
+	"context"
+	"encoding/json"
+	"strings"
+
+	"github.com/ponzischeme89/memby/server/internal/config"
+	"github.com/ponzischeme89/memby/server/internal/recommend"
+	"github.com/ponzischeme89/memby/server/internal/store"
+)
+
+// sectionDefinitionKeys are the three configuration values that hold a page's row
+// composition. A layout override can be set on any of them, and the home payload is the
+// single row source for all three browse destinations on the television, so all three are
+// merged into one lookup.
+var sectionDefinitionKeys = []string{
+	"home.sectionDefinitions",
+	"movies.sectionDefinitions",
+	"tv.sectionDefinitions",
+}
+
+// rowLayoutOverrides collects every operator-pinned card shape from the section
+// definitions, keyed by the definition id. An invalid or empty layout is not an override.
+func rowLayoutOverrides(policy store.FeaturePolicy) map[string]string {
+	overrides := map[string]string{}
+	for _, key := range sectionDefinitionKeys {
+		raw, ok := policy.Values[key]
+		if !ok {
+			continue
+		}
+		var definitions []config.RemoteSectionDefinition
+		if json.Unmarshal(raw, &definitions) != nil {
+			continue
+		}
+		for _, definition := range definitions {
+			switch definition.Layout {
+			case config.SectionLayoutPoster, config.SectionLayoutThumb:
+				id := strings.TrimSpace(definition.ID)
+				if id != "" {
+					overrides[id] = definition.Layout
+				}
+			}
+		}
+	}
+	return overrides
+}
+
+// applyRowLayoutOverrides stamps the pinned card shape onto each finished row. A row is
+// matched by its exact id first, then by a section id it is a child of ("for-you" pins
+// "for-you:home:evening" too) — the same rule applyRemoteHomeSections uses on the
+// television to rank a family of rows together. A row that already carries a layout (none
+// do today) is left alone. Pure, so it can be pinned by a test.
+func applyRowLayoutOverrides(rows []recommend.Row, overrides map[string]string) []recommend.Row {
+	if len(overrides) == 0 {
+		return rows
+	}
+	for index := range rows {
+		if rows[index].Layout != "" {
+			continue
+		}
+		if layout, ok := overrides[rows[index].ID]; ok {
+			rows[index].Layout = layout
+			continue
+		}
+		for section, layout := range overrides {
+			if strings.HasPrefix(rows[index].ID, section+":") {
+				rows[index].Layout = layout
+				break
+			}
+		}
+	}
+	return rows
+}
+
+func (s *Server) applyRowLayouts(ctx context.Context, rows []recommend.Row) []recommend.Row {
+	return applyRowLayoutOverrides(rows, rowLayoutOverrides(s.currentFeaturePolicy(ctx)))
+}