build a template website

db/init/01-schema.sql

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+CREATE TABLE visits (
+  id       bigserial PRIMARY KEY,
+  ts       timestamptz NOT NULL DEFAULT now(),
+  visitor  text NOT NULL,            -- daily-rotating hash, never an IP
+  referrer text,                     -- host only, NULL = direct
+  country  char(2) NOT NULL DEFAULT 'XX',
+  device   text NOT NULL             -- mobile | tablet | desktop
+);
+CREATE TABLE clicks (
+  id       bigserial PRIMARY KEY,
+  ts       timestamptz NOT NULL DEFAULT now(),
+  link_id  text NOT NULL,
+  visitor  text NOT NULL,
+  country  char(2) NOT NULL DEFAULT 'XX',
+  device   text NOT NULL
+);
+CREATE TABLE link_health (
+  link_id    text PRIMARY KEY,
+  url        text NOT NULL,
+  ok         boolean NOT NULL,
+  status     int,
+  note       text,
+  checked_at timestamptz NOT NULL DEFAULT now()
+);
+CREATE INDEX visits_ts ON visits (ts);
+CREATE INDEX clicks_ts ON clicks (ts);
+CREATE INDEX clicks_link ON clicks (link_id);
+
+-- Ready-made views for the stats site
+CREATE VIEW stats_daily AS
+  SELECT ts::date AS day, count(*) AS visits, count(DISTINCT visitor) AS uniques FROM visits GROUP BY 1;
+CREATE VIEW stats_link_clicks AS
+  SELECT link_id, count(*) AS clicks FROM clicks GROUP BY 1;
+CREATE VIEW stats_referrers AS
+  SELECT coalesce(referrer, 'direct') AS referrer, count(*) AS visits FROM visits GROUP BY 1;
+CREATE VIEW stats_countries AS
+  SELECT country, count(*) AS visits FROM visits GROUP BY 1;
+CREATE VIEW stats_devices AS
+  SELECT device, count(*) AS visits FROM visits GROUP BY 1;

db/init/02-roles.sh

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+#!/bin/sh
+# Runs once, on first start of an empty database volume.
+set -e
+psql -v ON_ERROR_STOP=1 -U "$POSTGRES_USER" -d "$POSTGRES_DB" <<SQL
+CREATE ROLE tracker_rw LOGIN PASSWORD '$TRACKER_PASSWORD';
+GRANT CONNECT ON DATABASE "$POSTGRES_DB" TO tracker_rw;
+GRANT USAGE ON SCHEMA public TO tracker_rw;
+GRANT INSERT ON visits, clicks TO tracker_rw;
+GRANT USAGE ON SEQUENCE visits_id_seq, clicks_id_seq TO tracker_rw;
+GRANT SELECT, INSERT, UPDATE ON link_health TO tracker_rw;
+
+CREATE ROLE stats_ro LOGIN PASSWORD '$STATS_RO_PASSWORD';
+ALTER ROLE stats_ro SET default_transaction_read_only = on;
+GRANT CONNECT ON DATABASE "$POSTGRES_DB" TO stats_ro;
+GRANT USAGE ON SCHEMA public TO stats_ro;
+GRANT SELECT ON ALL TABLES IN SCHEMA public TO stats_ro;
+ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO stats_ro;
+SQL