- Add slug/short_id fields to database with auto-generation

- Create migration script for existing data
- Update admin interface to show only short URLs
- Implement redirect system to avoid code duplication
- Maintain backward compatibility with old URLs

database/supabase-schema.sql

@@ -17,6 +17,7 @@ CREATE TABLE campaigns (
     status TEXT NOT NULL CHECK (status IN ('deposit', 'voting', 'closed')) DEFAULT 'deposit',
     budget_per_user INTEGER NOT NULL CHECK (budget_per_user > 0),
     spending_tiers TEXT NOT NULL, -- Montants séparés par des virgules (ex: "10,25,50,100")
+    slug TEXT UNIQUE, -- Slug unique pour les liens courts
     created_by UUID REFERENCES admin_users(id),
     created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
     updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
@@ -41,6 +42,7 @@ CREATE TABLE participants (
     first_name TEXT NOT NULL,
     last_name TEXT NOT NULL,
     email TEXT NOT NULL,
+    short_id TEXT UNIQUE, -- Identifiant court unique pour les liens de vote
     created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
 );
 
@@ -72,6 +74,8 @@ CREATE INDEX idx_propositions_campaign_id ON propositions(campaign_id);
 CREATE INDEX idx_participants_campaign_id ON participants(campaign_id);
 CREATE INDEX idx_campaigns_status ON campaigns(status);
 CREATE INDEX idx_campaigns_created_at ON campaigns(created_at DESC);
+CREATE INDEX idx_campaigns_slug ON campaigns(slug);
+CREATE INDEX idx_participants_short_id ON participants(short_id);
 CREATE INDEX idx_votes_campaign_participant ON votes(campaign_id, participant_id);
 CREATE INDEX idx_votes_proposition ON votes(proposition_id);
 CREATE INDEX idx_admin_users_email ON admin_users(email);
@@ -99,6 +103,69 @@ CREATE TRIGGER update_settings_updated_at BEFORE UPDATE ON settings
 CREATE TRIGGER update_admin_users_updated_at BEFORE UPDATE ON admin_users
     FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
 
+-- Fonction pour générer un slug à partir d'un titre
+CREATE OR REPLACE FUNCTION generate_slug(title TEXT)
+RETURNS TEXT AS $$
+DECLARE
+    slug TEXT;
+    counter INTEGER := 0;
+    base_slug TEXT;
+BEGIN
+    -- Convertir en minuscules et remplacer les caractères spéciaux
+    base_slug := lower(regexp_replace(title, '[^a-zA-Z0-9\s]', '', 'g'));
+    base_slug := regexp_replace(base_slug, '\s+', '-', 'g');
+    base_slug := trim(both '-' from base_slug);
+    
+    -- Si le slug est vide, utiliser 'campagne'
+    IF base_slug = '' THEN
+        base_slug := 'campagne';
+    END IF;
+    
+    slug := base_slug;
+    
+    -- Vérifier si le slug existe déjà et ajouter un numéro si nécessaire
+    WHILE EXISTS (SELECT 1 FROM campaigns WHERE campaigns.slug = slug) LOOP
+        counter := counter + 1;
+        slug := base_slug || '-' || counter;
+    END LOOP;
+    
+    RETURN slug;
+END;
+$$ LANGUAGE plpgsql;
+
+-- Fonction pour générer un short_id unique
+CREATE OR REPLACE FUNCTION generate_short_id()
+RETURNS TEXT AS $$
+DECLARE
+    chars TEXT := 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';
+    result TEXT := '';
+    i INTEGER;
+    short_id TEXT;
+    counter INTEGER := 0;
+BEGIN
+    LOOP
+        -- Générer un identifiant de 6 caractères
+        result := '';
+        FOR i IN 1..6 LOOP
+            result := result || substr(chars, floor(random() * length(chars))::integer + 1, 1);
+        END LOOP;
+        
+        short_id := result;
+        
+        -- Vérifier si le short_id existe déjà
+        IF NOT EXISTS (SELECT 1 FROM participants WHERE participants.short_id = short_id) THEN
+            RETURN short_id;
+        END IF;
+        
+        -- Éviter les boucles infinies
+        counter := counter + 1;
+        IF counter > 100 THEN
+            RAISE EXCEPTION 'Impossible de générer un short_id unique après 100 tentatives';
+        END IF;
+    END LOOP;
+END;
+$$ LANGUAGE plpgsql;
+
 -- Activer RLS sur toutes les tables
 ALTER TABLE admin_users ENABLE ROW LEVEL SECURITY;
 ALTER TABLE campaigns ENABLE ROW LEVEL SECURITY;