Class DtcgEmitterHandler

packages/cli/src/linter/dtcg/handler.ts:24–118

 * No side effects.
 */
export class DtcgEmitterHandler implements DtcgEmitterSpec {
  execute(state: DesignSystemState): DtcgEmitterResult {
    const file: DtcgTokenFile = {
      $schema: DTCG_SCHEMA_URL,
    };

    if (state.name || state.description) {
      file.$description = state.description || state.name;
    }

    const colorGroup = this.mapColors(state);
    if (colorGroup) file['color'] = colorGroup;

    const spacingGroup = this.mapDimensionGroup(state.spacing);
    if (spacingGroup) file['spacing'] = spacingGroup;

    const roundedGroup = this.mapDimensionGroup(state.rounded);
    if (roundedGroup) file['rounded'] = roundedGroup;

    const typographyGroup = this.mapTypography(state);
    if (typographyGroup) file['typography'] = typographyGroup;

    return { success: true, data: file as Record<string, unknown> };
  }

  private mapColors(state: DesignSystemState): DtcgGroup | null {
    if (state.colors.size === 0) return null;
    const group: DtcgGroup = { $type: 'color' };
    for (const [name, color] of state.colors) {
      group[name] = {
        $value: this.colorToValue(color),
      } as DtcgToken;
    }
    return group;
  }

  private colorToValue(color: ResolvedColor): DtcgColorValue {
    return {
      colorSpace: 'srgb',
      components: [
        this.round(color.r / 255),
        this.round(color.g / 255),
        this.round(color.b / 255),
      ],
      hex: color.hex.toLowerCase(),
    };
  }

  private mapDimensionGroup(dims: Map<string, ResolvedDimension>): DtcgGroup | null {
    if (dims.size === 0) return null;
    const group: DtcgGroup = { $type: 'dimension' };
    for (const [name, dim] of dims) {
      group[name] = {
        $value: this.dimToValue(dim),
      } as DtcgToken;
    }
    return group;
  }