Remove legacy question storage (#7)

Deletes obsolete question/answer/vote persistence and the compatibility answer endpoint. Existing databases drop the legacy tables through migration 009. Plumber replies now notify the root homeowner even when nested beneath another plumber reply. Post and reply forms prevent duplicate submissions and show progress while posting.

Reviewed-on: #7
Co-authored-by: codegirl-007 <s.raide@gmail.com>

db/queries/answers.sql

@@ -1,11 +0,0 @@
--- name: UpsertAnswer :exec
-INSERT INTO answers (question_id, author_id, body, created_at, updated_at)
-VALUES ($1, $2, $3, $4, $5)
-ON CONFLICT (question_id) DO UPDATE
-SET body = excluded.body, author_id = excluded.author_id, updated_at = excluded.updated_at;
-
--- name: GetAnswer :one
-SELECT a.question_id, a.author_id, u.name AS author_name, a.body, a.created_at, a.updated_at
-FROM answers a
-JOIN users u ON u.id = a.author_id
-WHERE a.question_id = $1;

db/queries/questions.sql

@@ -1,62 +0,0 @@
--- name: CreateQuestion :exec
-INSERT INTO questions (id, author_id, title, body, city, hunt_date, hidden, created_at)
-VALUES ($1, $2, $3, $4, $5, $6, 0, $7);
-
--- name: HideQuestion :exec
-UPDATE questions
-SET hidden = 1
-WHERE id = $1;
-
--- name: ListHunt :many
-SELECT q.id, q.author_id, u.name AS author_name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at,
-       COALESCE(SUM(v.value), 0)::bigint AS score,
-       CASE WHEN a.question_id IS NULL THEN 0 ELSE 1 END::bigint AS answered,
-       COALESCE((
-         SELECT votes.value FROM votes
-         WHERE votes.user_id = sqlc.arg(viewer_id) AND votes.question_id = q.id
-       ), 0)::bigint AS user_vote
-FROM questions q
-JOIN users u ON u.id = q.author_id
-LEFT JOIN votes v ON v.question_id = q.id
-LEFT JOIN answers a ON a.question_id = q.id
-WHERE q.hunt_date = sqlc.arg(hunt_date) AND q.hidden = 0
-GROUP BY q.id, q.author_id, u.name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at, a.question_id
-ORDER BY score DESC, q.created_at ASC
-LIMIT sqlc.arg(row_limit);
-
--- name: GetQuestion :one
-SELECT q.id, q.author_id, u.name AS author_name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at,
-       COALESCE((SELECT SUM(votes.value) FROM votes WHERE votes.question_id = q.id), 0)::bigint AS score,
-       CASE WHEN a.question_id IS NULL THEN 0 ELSE 1 END::bigint AS answered,
-       COALESCE((
-         SELECT votes.value FROM votes
-         WHERE votes.user_id = sqlc.arg(viewer_id) AND votes.question_id = q.id
-       ), 0)::bigint AS user_vote
-FROM questions q
-JOIN users u ON u.id = q.author_id
-LEFT JOIN answers a ON a.question_id = q.id
-WHERE q.id = sqlc.arg(id);
-
--- name: ListQuestionsByAuthor :many
-SELECT q.id, q.author_id, u.name AS author_name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at,
-       COALESCE((SELECT SUM(votes.value) FROM votes WHERE votes.question_id = q.id), 0)::bigint AS score,
-       CASE WHEN a.question_id IS NULL THEN 0 ELSE 1 END::bigint AS answered,
-       0::bigint AS user_vote
-FROM questions q
-JOIN users u ON u.id = q.author_id
-LEFT JOIN answers a ON a.question_id = q.id
-WHERE q.author_id = sqlc.arg(author_id) AND q.hidden = 0
-ORDER BY q.created_at DESC
-LIMIT sqlc.arg(row_limit);
-
--- name: ListQuestionsAnsweredBy :many
-SELECT q.id, q.author_id, u.name AS author_name, q.title, q.body, q.city, q.hunt_date, q.hidden, q.created_at,
-       COALESCE((SELECT SUM(votes.value) FROM votes WHERE votes.question_id = q.id), 0)::bigint AS score,
-       1::bigint AS answered,
-       0::bigint AS user_vote
-FROM answers ans
-JOIN questions q ON q.id = ans.question_id
-JOIN users u ON u.id = q.author_id
-WHERE ans.author_id = sqlc.arg(admin_id) AND q.hidden = 0
-ORDER BY ans.updated_at DESC
-LIMIT sqlc.arg(row_limit);

db/queries/votes.sql

@@ -1,24 +0,0 @@
--- name: GetVote :one
-SELECT value
-FROM votes
-WHERE user_id = $1 AND question_id = $2;
-
--- name: QuestionIsVisible :one
-SELECT EXISTS(
-  SELECT 1 FROM questions WHERE id = $1 AND hidden = 0
-)::bool;
-
--- name: DeleteVote :exec
-DELETE FROM votes
-WHERE user_id = $1 AND question_id = $2;
-
--- name: UpsertVoteOnVisible :execrows
-INSERT INTO votes (user_id, question_id, value)
-SELECT $1, $2, $3
-FROM questions q
-WHERE q.id = $2 AND q.hidden = 0
-ON CONFLICT (user_id, question_id) DO UPDATE
-SET value = excluded.value
-WHERE EXISTS (
-  SELECT 1 FROM questions q2 WHERE q2.id = excluded.question_id AND q2.hidden = 0
-);