Add variant-enabled funnel example

public/funnels/funnel-test-variants.json

@@ -0,0 +1,663 @@
+{
+  "meta": {
+    "id": "funnel-test",
+    "title": "Relationship Portrait",
+    "description": "Demo funnel mirroring design screens with branching by analysis target.",
+    "firstScreenId": "intro-welcome"
+  },
+  "defaultTexts": {
+    "nextButton": "Next",
+    "continueButton": "Continue"
+  },
+  "screens": [
+    {
+      "id": "intro-welcome",
+      "template": "info",
+      "title": {
+        "text": "Вы не одиноки в этом страхе",
+        "font": "manrope",
+        "weight": "bold",
+        "align": "center"
+      },
+      "description": {
+        "text": "Многие боятся повторить прошлый опыт. Мы поможем распознать верные сигналы и выбрать «своего» человека.",
+        "font": "inter",
+        "weight": "medium",
+        "color": "default",
+        "align": "center"
+      },
+      "icon": {
+        "type": "emoji",
+        "value": "❤️",
+        "size": "xl"
+      },
+      "bottomActionButton": {
+        "text": "Next"
+      },
+      "navigation": {
+        "defaultNextScreenId": "intro-statistics"
+      }
+    },
+    {
+      "id": "intro-statistics",
+      "template": "info",
+      "title": {
+        "text": "По нашей статистике 51 % женщин Овнов доверяются эмоциям. Но одной чувствительности мало. Мы покажем, какие качества второй половинки дадут тепло и уверенность, и изобразим её портрет.",
+        "font": "manrope",
+        "weight": "bold",
+        "align": "center"
+      },
+      "icon": {
+        "type": "emoji",
+        "value": "🔥❤️",
+        "size": "xl"
+      },
+      "bottomActionButton": {
+        "text": "Next"
+      },
+      "navigation": {
+        "defaultNextScreenId": "intro-partner-traits"
+      }
+    },
+    {
+      "id": "intro-partner-traits",
+      "template": "info",
+      "header": {
+        "showBackButton": false
+      },
+      "title": {
+        "text": "Такой партнёр умеет слышать и поддерживать, а вы — человек с глубокой душой, который ценит искренность и силу настоящих чувств.",
+        "font": "manrope",
+        "weight": "bold",
+        "align": "center"
+      },
+      "icon": {
+        "type": "emoji",
+        "value": "💖",
+        "size": "xl"
+      },
+      "bottomActionButton": {
+        "text": "Next"
+      },
+      "navigation": {
+        "defaultNextScreenId": "birth-date"
+      }
+    },
+    {
+      "id": "birth-date",
+      "template": "date",
+      "title": {
+        "text": "Когда ты родился?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "В момент вашего рождения заложенны глубинные закономерности.",
+        "font": "inter",
+        "weight": "medium",
+        "color": "muted"
+      },
+      "dateInput": {
+        "monthPlaceholder": "MM",
+        "dayPlaceholder": "DD", 
+        "yearPlaceholder": "YYYY",
+        "monthLabel": "Month",
+        "dayLabel": "Day",
+        "yearLabel": "Year",
+        "showSelectedDate": true,
+        "selectedDateLabel": "Выбранная дата:"
+      },
+      "infoMessage": {
+        "text": "Мы не передаем личную информацию, она остаётся в безопасности и под вашим контролем.",
+        "font": "inter",
+        "weight": "medium",
+        "color": "muted"
+      },
+      "bottomActionButton": {
+        "text": "Next"
+      },
+      "navigation": {
+        "defaultNextScreenId": "address-form"
+      }
+    },
+    {
+      "id": "address-form",
+      "template": "form",
+      "title": {
+        "text": "Which best represents your hair loss and goals?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "Let's personalize your hair care journey",
+        "font": "inter",
+        "weight": "medium",
+        "color": "muted"
+      },
+      "fields": [
+        {
+          "id": "address",
+          "label": "Address",
+          "placeholder": "Enter your full address",
+          "type": "text",
+          "required": true,
+          "maxLength": 200
+        }
+      ],
+      "validationMessages": {
+        "required": "${field} обязательно для заполнения",
+        "maxLength": "Максимум ${maxLength} символов",
+        "invalidFormat": "Неверный формат"
+      },
+      "navigation": {
+        "defaultNextScreenId": "statistics-text"
+      }
+    },
+    {
+      "id": "statistics-text",
+      "template": "info",
+      "title": {
+        "text": "Which best represents your hair loss and goals?",
+        "font": "manrope",
+        "weight": "bold",
+        "align": "center"
+      },
+      "description": {
+        "text": "По нашей статистике 51 % женщин Овнов доверяются эмоциям. Но одной чувствительности мало. Мы покажем, какие качества второй половинки дадут тепло и уверенность, и изобразим её портрет.",
+        "font": "inter",
+        "weight": "medium",
+        "color": "default",
+        "align": "center"
+      }
+    },
+    {
+      "id": "gender",
+      "template": "list",
+      "title": {
+        "text": "Какого ты пола?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "Все начинается с тебя! Выбери свой пол.",
+        "font": "inter",
+        "weight": "medium",
+        "color": "muted"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "female",
+            "label": "FEMALE",
+            "emoji": "💗"
+          },
+          {
+            "id": "male",
+            "label": "MALE",
+            "emoji": "💙"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "relationship-status"
+      }
+    },
+    {
+      "id": "relationship-status",
+      "template": "list",
+      "title": {
+        "text": "Вы сейчас?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "Это нужно, чтобы портрет и советы были точнее.",
+        "color": "muted"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "in-relationship",
+            "label": "В отношениях"
+          },
+          {
+            "id": "single",
+            "label": "Свободны"
+          },
+          {
+            "id": "after-breakup",
+            "label": "После расставания"
+          },
+          {
+            "id": "complicated",
+            "label": "Все сложно"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "analysis-target"
+      }
+    },
+    {
+      "id": "analysis-target",
+      "template": "list",
+      "title": {
+        "text": "Кого анализируем?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "current-partner",
+            "label": "Текущего партнера"
+          },
+          {
+            "id": "crush",
+            "label": "Человека, который нравится"
+          },
+          {
+            "id": "ex-partner",
+            "label": "Бывшего"
+          },
+          {
+            "id": "future-partner",
+            "label": "Будущую встречу"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "partner-age"
+      }
+    },
+    {
+      "id": "partner-age",
+      "template": "list",
+      "title": {
+        "text": "Возраст партнера",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "Чтобы портрет был максимально точным, уточните возраст.",
+        "font": "inter",
+        "weight": "medium",
+        "color": "muted"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "under-29",
+            "label": "До 29"
+          },
+          {
+            "id": "30-39",
+            "label": "30-39"
+          },
+          {
+            "id": "40-49",
+            "label": "40-49"
+          },
+          {
+            "id": "50-59",
+            "label": "50-59"
+          },
+          {
+            "id": "60-plus",
+            "label": "60+"
+          }
+        ]
+      },
+      "variants": [
+        {
+          "conditions": [
+            {
+              "screenId": "analysis-target",
+              "operator": "includesAny",
+              "optionIds": ["current-partner"]
+            }
+          ],
+          "overrides": {
+            "title": {
+              "text": "Возраст текущего партнера",
+              "font": "manrope",
+              "weight": "bold"
+            }
+          }
+        },
+        {
+          "conditions": [
+            {
+              "screenId": "analysis-target",
+              "operator": "includesAny",
+              "optionIds": ["crush"]
+            }
+          ],
+          "overrides": {
+            "title": {
+              "text": "Возраст человека, который нравится",
+              "font": "manrope",
+              "weight": "bold"
+            },
+            "bottomActionButton": {
+              "show": false
+            }
+          }
+        },
+        {
+          "conditions": [
+            {
+              "screenId": "analysis-target",
+              "operator": "includesAny",
+              "optionIds": ["ex-partner"]
+            }
+          ],
+          "overrides": {
+            "title": {
+              "text": "Возраст бывшего",
+              "font": "manrope",
+              "weight": "bold"
+            }
+          }
+        },
+        {
+          "conditions": [
+            {
+              "screenId": "analysis-target",
+              "operator": "includesAny",
+              "optionIds": ["future-partner"]
+            }
+          ],
+          "overrides": {
+            "title": {
+              "text": "Возраст будущего партнера",
+              "font": "manrope",
+              "weight": "bold"
+            },
+            "subtitle": {
+              "text": "Чтобы мы не упустили важные нюансы будущей встречи.",
+              "font": "inter",
+              "weight": "medium",
+              "color": "muted"
+            }
+          }
+        }
+      ],
+      "navigation": {
+        "rules": [
+          {
+            "conditions": [
+              {
+                "screenId": "partner-age",
+                "operator": "includesAny",
+                "optionIds": ["under-29"]
+              }
+            ],
+            "nextScreenId": "age-refine"
+          }
+        ],
+        "defaultNextScreenId": "partner-ethnicity"
+      }
+    },
+    {
+      "id": "age-refine",
+      "template": "list",
+      "title": {
+        "text": "Уточните чуть точнее",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "Чтобы портрет был максимально похож.",
+        "color": "muted"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "18-21",
+            "label": "18-21"
+          },
+          {
+            "id": "22-25",
+            "label": "22-25"
+          },
+          {
+            "id": "26-29",
+            "label": "26-29"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "partner-ethnicity"
+      }
+    },
+    {
+      "id": "partner-ethnicity",
+      "template": "list",
+      "title": {
+        "text": "Этническая принадлежность твоей второй половинки?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "white",
+            "label": "White"
+          },
+          {
+            "id": "hispanic",
+            "label": "Hispanic / Latino"
+          },
+          {
+            "id": "african",
+            "label": "African / African-American"
+          },
+          {
+            "id": "asian",
+            "label": "Asian"
+          },
+          {
+            "id": "south-asian",
+            "label": "Indian / South Asian"
+          },
+          {
+            "id": "middle-eastern",
+            "label": "Middle Eastern / Arab"
+          },
+          {
+            "id": "indigenous",
+            "label": "Native American / Indigenous"
+          },
+          {
+            "id": "no-preference",
+            "label": "No preference"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "partner-eyes"
+      }
+    },
+    {
+      "id": "partner-eyes",
+      "template": "list",
+      "title": {
+        "text": "Что из этого «про глаза»?",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "warm-glow",
+            "label": "Тёплые искры на свету"
+          },
+          {
+            "id": "clear-depth",
+            "label": "Прозрачная глубина"
+          },
+          {
+            "id": "green-sheen",
+            "label": "Зелёный отлив на границе зрачка"
+          },
+          {
+            "id": "steel-glint",
+            "label": "Холодный стальной отблеск"
+          },
+          {
+            "id": "deep-shadow",
+            "label": "Насыщенная темнота"
+          },
+          {
+            "id": "dont-know",
+            "label": "Не знаю"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "partner-hair-length"
+      }
+    },
+    {
+      "id": "partner-hair-length",
+      "template": "list",
+      "title": {
+        "text": "Выберите длину волос",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "subtitle": {
+        "text": "От неё зависит форма и настроение портрета.",
+        "color": "muted"
+      },
+      "list": {
+        "selectionType": "single",
+        "options": [
+          {
+            "id": "short",
+            "label": "Короткие"
+          },
+          {
+            "id": "medium",
+            "label": "Средние"
+          },
+          {
+            "id": "long",
+            "label": "Длинные"
+          }
+        ]
+      },
+      "navigation": {
+        "defaultNextScreenId": "burnout-support"
+      }
+    },
+    {
+      "id": "burnout-support",
+      "template": "list",
+      "title": {
+        "text": "Когда ты выгораешь, тебе нужно чтобы партнёр...",
+        "font": "manrope",
+        "weight": "bold"
+      },
+      "list": {
+        "selectionType": "multi",
+        "options": [
+          {
+            "id": "reassure",
+            "label": "Признал ваше разочарование и успокоил"
+          },
+          {
+            "id": "emotional-support",
+            "label": "Дал эмоциональную опору и безопасное пространство"
+          },
+          {
+            "id": "take-over",
+            "label": "Перехватил быт/дела, чтобы вы восстановились"
+          },
+          {
+            "id": "energize",
+            "label": "Вдохнул энергию через цель и короткий план действий"
+          },
+          {
+            "id": "switch-positive",
+            "label": "Переключил на позитив: прогулка, кино, смешные истории"
+          }
+        ]
+      },
+      "bottomActionButton": {
+        "text": "Continue",
+        "show": false
+      },
+      "navigation": {
+        "defaultNextScreenId": "special-offer"
+      }
+    },
+    {
+      "id": "special-offer",
+      "template": "coupon",
+      "header": {
+        "show": false
+      },
+      "title": {
+        "text": "Тебе повезло!",
+        "font": "manrope",
+        "weight": "bold",
+        "align": "center"
+      },
+      "subtitle": {
+        "text": "Ты получил специальную эксклюзивную скидку на 94%",
+        "font": "inter",
+        "weight": "medium",
+        "color": "muted",
+        "align": "center"
+      },
+      "copiedMessage": "Промокод \"{code}\" скопирован!",
+      "coupon": {
+        "title": {
+          "text": "Special Offer",
+          "font": "manrope",
+          "weight": "bold",
+          "color": "primary"
+        },
+        "offer": {
+          "title": {
+            "text": "94% OFF",
+            "font": "manrope",
+            "weight": "black",
+            "color": "card",
+            "size": "4xl"
+          },
+          "description": {
+            "text": "Одноразовая эксклюзивная скидка",
+            "font": "inter",
+            "weight": "semiBold",
+            "color": "card"
+          }
+        },
+        "promoCode": {
+          "text": "HAIR50",
+          "font": "inter",
+          "weight": "semiBold"
+        },
+        "footer": {
+          "text": "Скопируйте или нажмите Continue",
+          "font": "inter",
+          "weight": "medium",
+          "color": "muted",
+          "size": "sm"
+        }
+      },
+      "bottomActionButton": {
+        "text": "Continue"
+      }
+    }
+  ]
+}

src/components/funnel/FunnelRuntime.tsx

@@ -10,6 +10,7 @@ import { DateTemplate } from "@/components/funnel/templates/DateTemplate";
 import { CouponTemplate } from "@/components/funnel/templates/CouponTemplate";
 import { FormTemplate } from "@/components/funnel/templates/FormTemplate";
 import { resolveNextScreenId } from "@/lib/funnel/navigation";
+import { resolveScreenVariant } from "@/lib/funnel/variants";
 import { useFunnelRuntime } from "@/lib/funnel/FunnelProvider";
 import type {
   FunnelDefinition,
@@ -31,10 +32,11 @@ function estimatePathLength(funnel: FunnelDefinition, answers: FunnelAnswers): n
   while (currentScreenId && !visited.has(currentScreenId)) {
     visited.add(currentScreenId);
     
-    const currentScreen = funnel.screens.find(s => s.id === currentScreenId);
+    const currentScreen = funnel.screens.find((s) => s.id === currentScreenId);
     if (!currentScreen) break;
-    
+
-    const nextScreenId = resolveNextScreenId(currentScreen, answers, funnel.screens);
+    const resolvedScreen = resolveScreenVariant(currentScreen, answers);
+    const nextScreenId = resolveNextScreenId(resolvedScreen, answers, funnel.screens);
     
     // Если достигли конца или зацикливание
     if (!nextScreenId || visited.has(nextScreenId)) {
@@ -229,10 +231,18 @@ export function FunnelRuntime({ funnel, initialScreenId }: FunnelRuntimeProps) {
     funnel.meta.id
   );
 
-  const currentScreen = useMemo(() => {
+  const baseScreen = useMemo(() => {
-    return getScreenById(funnel, initialScreenId) ?? funnel.screens[0];
+    const screen = getScreenById(funnel, initialScreenId) ?? funnel.screens[0];
+    if (!screen) {
+      throw new Error("Funnel definition does not contain any screens");
+    }
+    return screen;
   }, [funnel, initialScreenId]);
 
+  const currentScreen = useMemo(() => {
+    return resolveScreenVariant(baseScreen, answers);
+  }, [baseScreen, answers]);
+
   const selectedOptionIds = answers[currentScreen.id] ?? [];
 
   useEffect(() => {

src/lib/funnel/navigation.ts

@@ -41,12 +41,19 @@ function satisfiesCondition(
   }
 }
 
-function satisfiesRule(rule: NavigationRuleDefinition, answers: FunnelAnswers): boolean {
+export function matchesNavigationConditions(
-  if (!rule.conditions || rule.conditions.length === 0) {
+  conditions: NavigationConditionDefinition[] | undefined,
+  answers: FunnelAnswers
+): boolean {
+  if (!conditions || conditions.length === 0) {
     return false;
   }
 
-  return rule.conditions.every((condition) => satisfiesCondition(condition, answers));
+  return conditions.every((condition) => satisfiesCondition(condition, answers));
+}
+
+function satisfiesRule(rule: NavigationRuleDefinition, answers: FunnelAnswers): boolean {
+  return matchesNavigationConditions(rule.conditions, answers);
 }
 
 export function resolveNextScreenId(

src/lib/funnel/types.ts

@@ -85,6 +85,13 @@ export interface NavigationDefinition {
   defaultNextScreenId?: string;
 }
 
+type ScreenVariantOverrides<T> = Partial<Omit<T, "id" | "template" | "variants">>;
+
+export interface ScreenVariantDefinition<T extends { id: string; template: string }> {
+  conditions: NavigationConditionDefinition[];
+  overrides: ScreenVariantOverrides<T>;
+}
+
 export interface InfoScreenDefinition {
   id: string;
   template: "info";
@@ -99,6 +106,7 @@ export interface InfoScreenDefinition {
   };
   bottomActionButton?: BottomActionButtonDefinition;
   navigation?: NavigationDefinition;
+  variants?: ScreenVariantDefinition<InfoScreenDefinition>[];
 }
 
 export interface DateInputDefinition {
@@ -126,6 +134,7 @@ export interface DateScreenDefinition {
   };
   bottomActionButton?: BottomActionButtonDefinition;
   navigation?: NavigationDefinition;
+  variants?: ScreenVariantDefinition<DateScreenDefinition>[];
 }
 
 export interface CouponDefinition {
@@ -148,6 +157,7 @@ export interface CouponScreenDefinition {
   copiedMessage?: string; // "Промокод скопирован!" text
   bottomActionButton?: BottomActionButtonDefinition;
   navigation?: NavigationDefinition;
+  variants?: ScreenVariantDefinition<CouponScreenDefinition>[];
 }
 
 export interface FormFieldDefinition {
@@ -179,6 +189,7 @@ export interface FormScreenDefinition {
   validationMessages?: FormValidationMessages;
   bottomActionButton?: BottomActionButtonDefinition;
   navigation?: NavigationDefinition;
+  variants?: ScreenVariantDefinition<FormScreenDefinition>[];
 }
 
 
@@ -196,6 +207,7 @@ export interface ListScreenDefinition {
   };
   bottomActionButton?: BottomActionButtonDefinition;
   navigation?: NavigationDefinition;
+  variants?: ScreenVariantDefinition<ListScreenDefinition>[];
 }
 
 export type ScreenDefinition = InfoScreenDefinition | DateScreenDefinition | CouponScreenDefinition | FormScreenDefinition | ListScreenDefinition;

src/lib/funnel/variants.ts

@@ -0,0 +1,78 @@
+import { matchesNavigationConditions } from "./navigation";
+import type {
+  FunnelAnswers,
+  ScreenDefinition,
+  ScreenVariantDefinition,
+} from "./types";
+
+function cloneScreen<T>(screen: T): T {
+  if (typeof globalThis.structuredClone === "function") {
+    return globalThis.structuredClone(screen);
+  }
+
+  return JSON.parse(JSON.stringify(screen)) as T;
+}
+
+function isPlainObject(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null && !Array.isArray(value);
+}
+
+function deepMerge<T>(target: T, source: Partial<T> | undefined): T {
+  if (!source) {
+    return target;
+  }
+
+  const result: T = Array.isArray(target)
+    ? ([...target] as unknown as T)
+    : ({ ...(target as Record<string, unknown>) } as T);
+
+  for (const key of Object.keys(source) as (keyof T)[]) {
+    const sourceValue = source[key];
+
+    if (sourceValue === undefined) {
+      continue;
+    }
+
+    const targetValue = (result as Record<string, unknown>)[key as unknown as string];
+
+    if (isPlainObject(sourceValue)) {
+      const baseValue = isPlainObject(targetValue) ? targetValue : {};
+      (result as Record<string, unknown>)[key as unknown as string] = deepMerge(
+        baseValue,
+        sourceValue as Record<string, unknown>
+      ) as unknown as T[keyof T];
+      continue;
+    }
+
+    (result as Record<string, unknown>)[key as unknown as string] = sourceValue as unknown as T[keyof T];
+  }
+
+  return result;
+}
+
+function applyScreenOverrides<T extends ScreenDefinition>(
+  screen: T,
+  overrides: ScreenVariantDefinition<T>["overrides"]
+): T {
+  const cloned = cloneScreen(screen);
+  return deepMerge(cloned, overrides);
+}
+
+export function resolveScreenVariant<T extends ScreenDefinition>(
+  screen: T,
+  answers: FunnelAnswers
+): T {
+  const variants = (screen as T & { variants?: ScreenVariantDefinition<T>[] }).variants;
+
+  if (!variants || variants.length === 0) {
+    return screen;
+  }
+
+  for (const variant of variants) {
+    if (matchesNavigationConditions(variant.conditions, answers)) {
+      return applyScreenOverrides(screen, variant.overrides);
+    }
+  }
+
+  return screen;
+}