db/sqlc: priv map schemas and crud

Define the privacy mapper schemas and queries.

Author: ellemouton

db/migrations.go

@@ -22,7 +22,7 @@ const (
 	// daemon.
 	//
 	// NOTE: This MUST be updated when a new migration is added.
-	LatestMigrationVersion = 3
+	LatestMigrationVersion = 4
 )
 
 // MigrationTarget is a functional option that can be passed to applyMigrations

db/sqlc/migrations/000004_privacy_pairs.down.sql

@@ -0,0 +1,4 @@
+DROP INDEX IF EXISTS privacy_pairs_group_id_idx;
+DROP INDEX IF EXISTS privacy_pairs_unique_real;
+DROP INDEX IF EXISTS privacy_pairs_unique_pseudo;
+DROP TABLE IF EXISTS privacy_pairs;

db/sqlc/migrations/000004_privacy_pairs.up.sql

@@ -0,0 +1,26 @@
+-- privacy_pairs stores the privacy map pairs for a given session group.
+CREATE TABLE IF NOT EXISTS privacy_pairs (
+    -- The group ID of the session that this privacy pair is associated
+    -- with.
+    group_id BIGINT NOT NULL REFERENCES sessions(id) ON DELETE CASCADE,
+
+    -- The real value of the privacy pair.
+    real_val TEXT NOT NULL,
+
+    -- The pseudo value of the privacy pair.
+    pseudo_val TEXT NOT NULL
+);
+
+-- We'll want easy access to the privacy pairs for a given group ID.
+CREATE INDEX IF NOT EXISTS privacy_pairs_group_id_idx ON privacy_pairs(group_id);
+
+-- There should be no duplicate real values for a given group ID.
+CREATE UNIQUE INDEX privacy_pairs_unique_real ON privacy_pairs (
+    group_id, real_val
+);
+
+-- There should be no duplicate pseudo values for a given group ID.
+CREATE UNIQUE INDEX privacy_pairs_unique_pseudo ON privacy_pairs (
+    group_id, pseudo_val
+);
+

db/sqlc/models.go

@@ -0,0 +1,18 @@
+-- name: InsertPrivacyPair :exec
+INSERT INTO privacy_pairs (group_id, real_val, pseudo_val)
+VALUES ($1, $2, $3);
+
+-- name: GetRealForPseudo :one
+SELECT real_val
+FROM privacy_pairs
+WHERE group_id = $1 AND pseudo_val = $2;
+
+-- name: GetPseudoForReal :one
+SELECT pseudo_val
+FROM privacy_pairs
+WHERE group_id = $1 AND real_val = $2;
+
+-- name: GetAllPrivacyPairs :many
+SELECT real_val, pseudo_val
+FROM privacy_pairs
+WHERE group_id = $1;