Added migration file

db/migrations/20160414222845_0.2_campaign_flows.sql

@@ -0,0 +1,96 @@
+
+-- +goose Up
+-- SQL in section 'Up' is executed when this migration is applied
+ALTER TABLE campaigns RENAME TO campaigns_old;
+/*
+The new campaigns table will rely on a "flows" table that is basically a list of tasks to accomplish.
+
+This will include sending emails, hosting landing pages, or possibly taking other action as needed,
+including running scripts, sending HTTP requests, etc.
+*/
+CREATE TABLE campaigns ("id" integer primary key autoincrement, "user_id" bigint, "name" varchar(255) NOT NULL, "created_date" datetime, "completed_date" datetime, "flow_id" bigint, "status" varchar(255)); 
+
+INSERT INTO campaigns
+(
+	id,
+	user_id,
+	name,
+	created_date,
+	completed_date,
+	status
+)
+SELECT
+	campaigns_old.id,
+	campaigns_old.user_id,
+	campaigns_old.name,
+	campaigns_old.created_date,
+	campaigns_old.completed_date,
+	campaigns_old.status
+FROM campaigns_old;
+
+/* Create our flows table */
+
+CREATE TABLE "flows" ("id" integer primary key autoincrement,"user_id" bigint,"previous_id" bigint,"next_id" bigint,"campaign_id" bigint, "metadata" blob,"task" varchar(255));
+
+/* Setup our email flows */
+
+INSERT INTO flows (
+	user_id,
+	campaign_id,
+	task,
+	metadata
+)
+SELECT
+	campaigns_old.user_id,
+	campaigns_old.id,
+	"SEND_EMAIL",
+	'{'                      ||
+		'"smtp_id":'     || campaigns_old.smtp_id     || ',' ||
+		'"template_id":' || campaigns_old.template_id ||
+	'}'
+FROM campaigns_old;
+
+/* Setup our landing page flows */
+
+INSERT INTO flows (
+	user_id,
+	campaign_id,
+	task,
+	metadata,
+	previous_id
+)
+SELECT
+	campaigns_old.user_id,
+	campaigns_old.id as campaign_id,
+	"LANDING_PAGE",
+	'{'                    ||
+		'"page_id" : ' || campaigns_old.page_id || ',' ||
+		'"url" : "'    || campaigns_old.url     || '"' ||
+	'}',
+	flows.id as flow_id
+FROM campaigns_old, flows
+WHERE flows.id IN (
+	SELECT id FROM flows
+	WHERE campaign_id=campaigns_old.id
+		AND task="SEND_EMAIL"
+	);
+
+/* 
+Finally, we need to update our email flows to point to the landing page
+flows.
+*/ 
+
+UPDATE flows 
+SET 
+	next_id = (
+		SELECT f2.id
+		FROM flows AS f2
+		WHERE f2.previous_id=flows.id
+	       		AND f2.campaign_id = flows.campaign_id
+			AND f2.task = "LANDING_PAGE"
+		)
+	WHERE task = "SEND_EMAIL"	
+
+-- +goose Down
+-- SQL section 'Down' is executed when this migration is rolled back
+