# Section-Based Homepage Management System

**Status:** COMPLETE
**Created:** 2026-01-20
**Updated:** 2026-01-23
**Completed:** All 7 phases implemented

## Problem Statement

Current homepage implementation has critical issues:
1. **Hardcoded platform content** - Migrations contain OMS/Loyalty/Main-specific HTML
2. **Monolithic content storage** - Entire page stored as HTML blob, can't edit sections individually
3. **No admin control** - Hero, features, pricing sections are hardcoded in templates

## Solution: JSON-Based Section Architecture

### Approach: Add `sections` JSON field to ContentPage

**Why JSON field vs separate PageSection model:**
- Simpler - no new tables, no joins, no N+1 queries
- Flexible - schema can evolve without migrations
- Atomic - save entire homepage in one transaction
- Follows existing pattern - VendorTheme already uses JSON for `colors`

---

## Multi-Language Support

### Dynamic Language Support

Languages are NOT hardcoded. The system uses the platform's `supported_languages` setting:

```python
# Platform model already has:
supported_languages = Column(JSON)  # e.g., ["fr", "de", "en"]
default_language = Column(String)   # e.g., "fr"
```

### Schema with Dynamic i18n

```python
class TranslatableText(BaseModel):
    """
    Text field with translations stored as dict.
    Keys are language codes from platform.supported_languages.
    """
    translations: dict[str, str] = {}  # {"fr": "...", "de": "...", "en": "..."}

    def get(self, lang: str, default_lang: str = "fr") -> str:
        """Get translation with fallback to default language."""
        return self.translations.get(lang) or self.translations.get(default_lang) or ""

class HeroButton(BaseModel):
    text: TranslatableText
    url: str
    style: str = "primary"

class HeroSection(BaseModel):
    enabled: bool = True
    badge_text: Optional[TranslatableText] = None
    title: TranslatableText
    subtitle: TranslatableText
    background_type: str = "gradient"
    buttons: list[HeroButton] = []
```

### Template Usage with Platform Languages

```html
{# Language comes from platform settings #}
{% set lang = request.state.language or platform.default_language %}
{% set default_lang = platform.default_language %}

<h1>{{ hero.title.get(lang, default_lang) }}</h1>
<p>{{ hero.subtitle.get(lang, default_lang) }}</p>
```

### Admin UI Language Tabs

The admin editor dynamically generates language tabs from `platform.supported_languages`:

```javascript
// Fetch platform languages
const platform = await apiClient.get(`/admin/platforms/${platformCode}`);
const languages = platform.supported_languages; // ["fr", "de", "en"]

// Render language tabs dynamically
languages.forEach(lang => {
    addLanguageTab(lang);
});
```

---

## Implementation Plan

### Phase 1: Database Changes

**1.1 Add `sections` column to ContentPage**

File: `models/database/content_page.py`
```python
sections = Column(JSON, nullable=True, default=None)
```

**1.2 Create migration**

File: `alembic/versions/xxx_add_sections_to_content_pages.py`
- Add `sections` JSON column (nullable)

### Phase 2: Schema Validation

**2.1 Create Pydantic schemas with dynamic i18n**

File: `models/schema/homepage_sections.py` (NEW)

```python
from pydantic import BaseModel
from typing import Optional

class TranslatableText(BaseModel):
    """
    Stores translations as dict with language codes as keys.
    Language codes come from platform.supported_languages.
    """
    translations: dict[str, str] = {}

    def get(self, lang: str, default_lang: str = "fr") -> str:
        """Get text for language with fallback."""
        return self.translations.get(lang) or self.translations.get(default_lang) or ""

class HeroButton(BaseModel):
    text: TranslatableText
    url: str
    style: str = "primary"  # primary, secondary, outline

class HeroSection(BaseModel):
    enabled: bool = True
    badge_text: Optional[TranslatableText] = None
    title: TranslatableText = TranslatableText()
    subtitle: TranslatableText = TranslatableText()
    background_type: str = "gradient"
    buttons: list[HeroButton] = []

class FeatureCard(BaseModel):
    icon: str
    title: TranslatableText
    description: TranslatableText

class FeaturesSection(BaseModel):
    enabled: bool = True
    title: TranslatableText = TranslatableText()
    subtitle: Optional[TranslatableText] = None
    features: list[FeatureCard] = []
    layout: str = "grid"

class PricingSection(BaseModel):
    enabled: bool = True
    title: TranslatableText = TranslatableText()
    subtitle: Optional[TranslatableText] = None
    use_subscription_tiers: bool = True  # Pull from DB dynamically

class CTASection(BaseModel):
    enabled: bool = True
    title: TranslatableText = TranslatableText()
    subtitle: Optional[TranslatableText] = None
    buttons: list[HeroButton] = []

class HomepageSections(BaseModel):
    hero: Optional[HeroSection] = None
    features: Optional[FeaturesSection] = None
    pricing: Optional[PricingSection] = None
    cta: Optional[CTASection] = None
```

### Phase 3: Template Changes

**3.1 Create section partials**

Directory: `app/templates/platform/sections/` (NEW)
- `_hero.html` - Renders hero with language support
- `_features.html` - Renders features grid
- `_pricing.html` - Renders pricing (uses subscription_tiers from DB)
- `_cta.html` - Renders CTA section

**3.2 Update homepage templates**

File: `app/templates/platform/homepage-default.html`
```html
{% set lang = request.state.language or platform.default_language or 'fr' %}

{% if page and page.sections %}
    {{ render_hero(page.sections.hero, lang) }}
    {{ render_features(page.sections.features, lang) }}
    {{ render_pricing(page.sections.pricing, lang, tiers) }}
    {{ render_cta(page.sections.cta, lang) }}
{% else %}
    {# Placeholder for unconfigured homepage #}
{% endif %}
```

### Phase 4: Service Layer

**4.1 Add section methods to ContentPageService**

File: `app/services/content_page_service.py`
- `update_homepage_sections(db, page_id, sections, updated_by)` - Validates and saves
- `get_default_sections()` - Returns empty section structure

### Phase 5: Admin API

**5.1 Add section endpoints**

File: `app/api/v1/admin/content_pages.py`
- `GET /{page_id}/sections` - Get structured sections
- `PUT /{page_id}/sections` - Update all sections
- `PUT /{page_id}/sections/{section_name}` - Update single section

### Phase 6: Remove Hardcoded Content from Migrations

**6.1 Update OMS migration**

File: `alembic/versions/z4e5f6a7b8c9_add_multi_platform_support.py`
- Remove `oms_homepage_content` variable
- Create homepage with empty `sections` structure instead
- Set `is_published=False` (admin configures before publishing)

**6.2 Migration creates structure only**
- Migrations should ONLY create empty structure
- Content is entered via admin UI in each language

### Phase 7: Admin UI

**7.1 Add section editor to content-page-edit**

File: `app/templates/admin/content-page-edit.html`
- Add "Sections" tab for homepage pages
- Language tabs within each section (dynamically from platform.supported_languages)
- Form fields for each section type
- Enable/disable toggle per section

File: `static/admin/js/content-page-edit.js`
- Section editor logic
- Language tab switching
- Save sections via API

---

## Critical Files to Modify

1. `models/database/content_page.py` - Add `sections` column
2. `models/schema/homepage_sections.py` - NEW: Pydantic schemas with i18n
3. `app/services/content_page_service.py` - Add section methods
4. `app/api/v1/admin/content_pages.py` - Add section endpoints
5. `app/templates/platform/sections/` - NEW: Section partials
6. `app/templates/platform/homepage-default.html` - Use section partials
7. `app/routes/platform_pages.py` - Pass sections + language to context
8. `alembic/versions/z4e5f6a7b8c9_*.py` - Remove hardcoded content
9. `app/templates/admin/content-page-edit.html` - Section editor UI with language tabs
10. `static/admin/js/content-page-edit.js` - Section editor JS

---

## Section JSON Schema Example (with dynamic i18n)

Languages in `translations` dict come from `platform.supported_languages`.

```json
{
  "hero": {
    "enabled": true,
    "badge_text": {
      "translations": {
        "fr": "Essai gratuit de 30 jours",
        "de": "30 Tage kostenlos testen",
        "en": "30-Day Free Trial"
      }
    },
    "title": {
      "translations": {
        "fr": "Votre titre de plateforme ici",
        "de": "Ihr Plattform-Titel hier",
        "en": "Your Platform Headline Here"
      }
    },
    "subtitle": {
      "translations": {
        "fr": "Une description convaincante de votre plateforme.",
        "de": "Eine überzeugende Beschreibung Ihrer Plattform.",
        "en": "A compelling description of your platform."
      }
    },
    "background_type": "gradient",
    "buttons": [
      {
        "text": {
          "translations": {"fr": "Commencer", "de": "Loslegen", "en": "Get Started"}
        },
        "url": "/signup",
        "style": "primary"
      }
    ]
  },
  "features": {
    "enabled": true,
    "title": {
      "translations": {
        "fr": "Pourquoi nous choisir",
        "de": "Warum uns wählen",
        "en": "Why Choose Us"
      }
    },
    "features": [
      {
        "icon": "lightning-bolt",
        "title": {"translations": {"fr": "Rapide", "de": "Schnell", "en": "Fast"}},
        "description": {"translations": {"fr": "Rapide et efficace.", "de": "Schnell und effizient.", "en": "Quick and efficient."}}
      }
    ]
  },
  "pricing": {
    "enabled": true,
    "title": {
      "translations": {
        "fr": "Tarification simple",
        "de": "Einfache Preise",
        "en": "Simple Pricing"
      }
    },
    "use_subscription_tiers": true
  },
  "cta": {
    "enabled": true,
    "title": {
      "translations": {
        "fr": "Prêt à commencer?",
        "de": "Bereit anzufangen?",
        "en": "Ready to Start?"
      }
    },
    "buttons": [
      {
        "text": {
          "translations": {"fr": "S'inscrire gratuitement", "de": "Kostenlos registrieren", "en": "Sign Up Free"}
        },
        "url": "/signup",
        "style": "primary"
      }
    ]
  }
}
```

---

## Migration Strategy (No Hardcoded Content)

When creating a platform homepage:
```python
homepage = ContentPage(
    platform_id=platform_id,
    slug="home",
    title="Homepage",  # Generic
    content="",  # Empty - sections used instead
    sections=get_default_sections(),  # Empty structure with all languages
    is_published=False,  # Admin configures first
)
```

---

## Verification Steps

1. Run migration to add `sections` column
2. Create a test homepage with sections via API (all languages)
3. Verify homepage renders correct language based on request
4. Test admin UI section editor with language tabs
5. Verify pricing section pulls from subscription_tiers
6. Test enable/disable toggle for each section
7. Test language fallback when translation is missing

---

## Notes

- Languages are dynamic from `platform.supported_languages` (not hardcoded)
- Fallback uses `platform.default_language`
- Admin UI should allow partial translations (show warning indicator for missing)

## Pre-Implementation Cleanup

Before implementing, fix the broken OMS migration file:
- `alembic/versions/z4e5f6a7b8c9_add_multi_platform_support.py` has "I dn" on line 181
