146 lines
6.5 KiB
MySQL
146 lines
6.5 KiB
MySQL
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-- +goose Up
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CREATE TABLE "users"
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(
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"id" TEXT PRIMARY KEY
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);
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COMMENT ON COLUMN "users"."id"
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IS 'ID of the user. It is came from external system, so we can save it as a text field only';
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CREATE TYPE FEED_PROVIDER AS ENUM ('rss');
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CREATE TABLE "feeds"
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(
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"id" UUID NOT NULL PRIMARY KEY DEFAULT gen_random_uuid(),
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"title" TEXT NOT NULL DEFAULT '',
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"provider" FEED_PROVIDER NOT NULL,
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"source" TEXT NOT NULL,
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"last_fetched_at" TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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"fetch_interval" INTERVAL NOT NULL DEFAULT '1 hour'::INTERVAL,
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"next_fetch_at" TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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"last_error" TEXT DEFAULT NULL,
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"errors_count" INTEGER NOT NULL DEFAULT 0
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);
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CREATE UNIQUE INDEX "u_feeds__source" ON "feeds" ("source");
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CREATE INDEX "i_feeds__next_fetch_at" ON "feeds" ("next_fetch_at");
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COMMENT ON COLUMN "feeds"."id" IS 'Feed ID';
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COMMENT ON COLUMN "feeds"."title" IS 'Title';
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COMMENT ON COLUMN "feeds"."provider"
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IS 'Data provider, such as RSS or some another supported source type';
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COMMENT ON COLUMN "feeds"."source" IS 'Address of feed data';
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COMMENT ON COLUMN "feeds"."last_fetched_at" IS 'Date of last fetch of current feed';
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COMMENT ON COLUMN "feeds"."fetch_interval"
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IS 'Period of fetching new data. Will be shorten for active feeds with lots of updates, and longen for inactive or errored feeds';
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COMMENT ON COLUMN "feeds"."next_fetch_at" IS 'Computed field used only for speed-up queries. DO NOT EDIT!';
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COMMENT ON COLUMN "feeds"."last_error" IS 'Text description of last fetching error';
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COMMENT ON COLUMN "feeds"."errors_count"
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IS 'Number of fetching errors. Will increase for every time fetch was failed. Will be reseted if fetch was successful';
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-- +goose StatementBegin
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CREATE FUNCTION feeds_set_next_fetch_at() RETURNS trigger AS
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$feeds_set_next_fetch_at$
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BEGIN
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NEW."next_fetch_at" := NEW."last_fetched_at" + NEW."fetch_interval";
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RETURN NEW;
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END;
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$feeds_set_next_fetch_at$ LANGUAGE plpgsql;
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-- +goose StatementEnd
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CREATE TRIGGER "feeds_set_next_fetch_at"
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BEFORE INSERT OR UPDATE
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ON "feeds"
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FOR EACH ROW
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EXECUTE FUNCTION feeds_set_next_fetch_at();
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CREATE TABLE "feed_icons"
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(
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"feed_id" UUID NOT NULL PRIMARY KEY REFERENCES "feeds" ("id") ON DELETE CASCADE,
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"mimetype" TEXT NOT NULL,
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"icon" BYTEA DEFAULT NULL
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);
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COMMENT ON COLUMN "feed_icons"."feed_id" IS 'ID of feed';
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COMMENT ON COLUMN "feed_icons"."mimetype" IS 'Mimetype of the icon';
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COMMENT ON COLUMN "feed_icons"."icon" IS 'Icon of the feed (favicon)';
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CREATE TABLE "subscriptions"
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(
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"user_id" TEXT NOT NULL REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
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"feed_id" UUID NOT NULL REFERENCES "feeds" ("id") ON DELETE RESTRICT,
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"title" TEXT DEFAULT NULL
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);
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CREATE UNIQUE INDEX "u_subscription__user_feed" ON "subscriptions" ("user_id", "feed_id");
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CREATE INDEX "i_subscription__user" ON "subscriptions" ("user_id");
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COMMENT ON COLUMN "subscriptions"."user_id" IS 'ID of user';
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COMMENT ON COLUMN "subscriptions"."feed_id" IS 'ID of feed';
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COMMENT ON COLUMN "subscriptions"."title" IS 'User-defined name of the feed';
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CREATE TABLE "feed_items"
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(
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"id" UUID NOT NULL PRIMARY KEY DEFAULT gen_random_uuid(),
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"feed_id" UUID NOT NULL REFERENCES "feeds" ("id") ON DELETE CASCADE,
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"created_at" TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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"fetched_at" TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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"uid" TEXT NOT NULL,
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"title" TEXT NOT NULL,
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"content" TEXT NOT NULL DEFAULT '',
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"link" TEXT NOT NULL DEFAULT '',
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"author" TEXT NOT NULL DEFAULT '',
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"tags" TEXT[] NOT NULL DEFAULT '{}'
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);
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CREATE INDEX "i_feed_items__feed" ON "feed_items" ("feed_id");
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CREATE UNIQUE INDEX "u_feed_items__feed_uid" ON "feed_items" ("feed_id", "uid");
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CREATE INDEX "i_feed_items__fetched" ON "feed_items" ("fetched_at" DESC);
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COMMENT ON COLUMN "feed_items"."id" IS 'Item ID';
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COMMENT ON COLUMN "feed_items"."feed_id" IS 'Feed ID';
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COMMENT ON COLUMN "feed_items"."created_at" IS 'Item creation time (taken from feed info)';
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COMMENT ON COLUMN "feed_items"."fetched_at"
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IS 'Time when item was fetched and saved into database. This field will be used for cursor-based pagination';
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COMMENT ON COLUMN "feed_items"."uid" IS 'Unique ID of item in feed';
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COMMENT ON COLUMN "feed_items"."title" IS 'Title';
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COMMENT ON COLUMN "feed_items"."content"
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IS 'Sanitized HTML content: stripped danger tags, links modified to open in new tab and to strip referrer';
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COMMENT ON COLUMN "feed_items"."link" IS 'Link to full article content';
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COMMENT ON COLUMN "feed_items"."author" IS 'Name of the author of article (taken from feed info)';
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COMMENT ON COLUMN "feed_items"."tags" IS 'List of normalized (lowercased, trimmed) tags (taken from feed info)';
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CREATE TABLE "feed_item_attachments"
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(
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"id" BIGINT NOT NULL GENERATED ALWAYS AS IDENTITY PRIMARY KEY,
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"item_id" UUID NOT NULL REFERENCES "feed_items" ("id") ON DELETE CASCADE,
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"mimetype" TEXT NOT NULL,
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"url" TEXT NOT NULL,
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"size" BIGINT NOT NULL DEFAULT 0
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);
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CREATE TABLE "subscription_items"
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(
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"user_id" TEXT NOT NULL REFERENCES "users" ("id") ON DELETE CASCADE ON UPDATE CASCADE,
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"feed_id" UUID NOT NULL REFERENCES "feeds" ("id") ON DELETE CASCADE,
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"item_id" UUID NOT NULL REFERENCES "feed_items" ("id") ON DELETE CASCADE,
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"is_readed" BOOLEAN NOT NULL DEFAULT TRUE
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);
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CREATE UNIQUE INDEX "u_subscription_item__user_feed_item" ON "subscription_items" ("user_id", "feed_id", "item_id");
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COMMENT ON COLUMN "subscription_items"."user_id" IS 'ID of subscribed user (used in subscription composite key)';
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COMMENT ON COLUMN "subscription_items"."feed_id" IS 'ID of related feed (used in subscription composite key)';
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COMMENT ON COLUMN "subscription_items"."item_id" IS 'ID of specific feed item';
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COMMENT ON COLUMN "subscription_items"."is_readed"
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IS 'This flag means item is marked as read and should not appear in feed (except special query). This flag MUST be treated as FALSE if row does not exists';
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-- +goose Down
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DROP TABLE "subscription_items";
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DROP TABLE "feed_item_attachments";
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DROP TABLE "feed_items";
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DROP TABLE "subscriptions";
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DROP TABLE "feed_icons";
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DROP TABLE "feeds";
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DROP FUNCTION "feeds_set_next_fetch_at";
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DROP TYPE FEED_PROVIDER;
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DROP TABLE "users";
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