Nutrition algorithms

nutrition-algorithm

Turns the user’s goal plus their real intake and weight data into a daily calorie target. Picked in Nutrition → Goal → Algorithm.

export const pluginBundle = {
  formatVersion: 1,
  pluginId: "com.you.pure-trend",
  family: "nutrition-algorithm",
  entryExport: "algorithm",
} as const;

export const algorithm = {
  id: "com.you.pure-trend",
  name: "Pure Trend",
  description: "Sets the target from intake vs. weight trend.",

  computeTargets(input) {
    // input: { goal, currentWeightKg, weightEntries, dailyIntakeKcal, userPreferences, now }
    const intake = input.dailyIntakeKcal;
    if (intake.length < 10) return { kcal: 0 };   // 0 = "not enough data"

    const avgIntake = intake.reduce((s, d) => s + d.kcal, 0) / intake.length;
    const rateKgPerWeek = input.goal.targetRateKgPerWeek ?? 0;
    const adjust = rateKgPerWeek * 1100; // ~7700 kcal/kg over a week

    return {
      kcal: Math.round(avgIntake + adjust),
      sourceLabel: "Trend",
      maintenanceKcal: Math.round(avgIntake),
    };
  },
};

Output

type NutritionAlgorithmOutput = {
  kcal: number;                    // 0 signals "not enough data"
  macros?: { proteinG; carbsG; fatG };  // omit → app derives from the goal
  maintenanceKcal?: number;
  sourceLabel?: string;            // short badge, e.g. "Adaptive"
  notes?: string;
};

The app owns two things the algorithm doesn’t: a manual calorie override on the goal (always wins), and deriving macros from the goal’s protein g/kg + fat % when you return only kcal.

preferencesSchema / defaultPreferences work exactly as in progression.

nutrition-analytics

Same shape as analytics — compute(input) => { metrics, series, insights } — but over a window of diary days + weight entries:

compute(input) {
  // input: { days, weightEntries, goal, targets, range, now }
  const avgKcal =
    input.days.reduce((s, d) => s + (d.totals?.kcal ?? 0), 0) / (input.days.length || 1);
  return {
    metrics: [{ id: "avgKcal", value: Math.round(avgKcal) }],
    series: [],
    insights: [],
  };
}