omnichannel-deploy/database/migrations/015_agent_presence_pause.sql

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-- ============================================================
-- Migration 015: Presenca do agente e reserva de chamados em pausa
-- Tabelas:
-- agent_presence
-- whatsapp_chat_atribuicoes
-- ============================================================
CREATE TABLE IF NOT EXISTS agent_presence (
user_id INTEGER PRIMARY KEY REFERENCES usuarios(id) ON DELETE CASCADE,
status VARCHAR(40) NOT NULL DEFAULT 'offline',
paused_at TIMESTAMP WITH TIME ZONE,
last_seen_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP,
updated_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);
DO $$
BEGIN
IF NOT EXISTS (
SELECT 1
FROM pg_constraint
WHERE conname = 'chk_agent_presence_status'
) THEN
ALTER TABLE agent_presence
ADD CONSTRAINT chk_agent_presence_status
CHECK (status IN ('available', 'paused', 'offline'));
END IF;
END $$;
INSERT INTO agent_presence (user_id, status, last_seen_at, updated_at)
SELECT id, 'available', CURRENT_TIMESTAMP, CURRENT_TIMESTAMP
FROM usuarios
ON CONFLICT (user_id) DO NOTHING;
ALTER TABLE whatsapp_chat_atribuicoes
ADD COLUMN IF NOT EXISTS reserved_user_id INTEGER REFERENCES usuarios(id) ON DELETE SET NULL,
ADD COLUMN IF NOT EXISTS reserved_at TIMESTAMP WITH TIME ZONE,
ADD COLUMN IF NOT EXISTS pause_released_at TIMESTAMP WITH TIME ZONE;
CREATE INDEX IF NOT EXISTS idx_agent_presence_status
ON agent_presence (status);
CREATE INDEX IF NOT EXISTS idx_agent_presence_paused_at
ON agent_presence (paused_at)
WHERE status = 'paused';
CREATE INDEX IF NOT EXISTS idx_whatsapp_atribuicoes_reserved_user
ON whatsapp_chat_atribuicoes (reserved_user_id, status)
WHERE reserved_user_id IS NOT NULL;
CREATE INDEX IF NOT EXISTS idx_whatsapp_atribuicoes_reserved_queue
ON whatsapp_chat_atribuicoes (area_id, status, reserved_user_id)
WHERE status = 'queued';