initial commit

backend/migrations/00002_question_library_and_invitations.sql

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+-- +goose Up
+ALTER TABLE job_postings
+    ADD COLUMN status VARCHAR(32) NOT NULL DEFAULT 'draft'
+        CHECK (status IN ('draft', 'published', 'deprecated')),
+    ADD COLUMN duration_minutes INTEGER NOT NULL DEFAULT 60
+        CHECK (duration_minutes BETWEEN 1 AND 480);
+
+UPDATE job_postings SET status = 'published';
+
+ALTER TABLE questions ADD COLUMN deprecated BOOLEAN NOT NULL DEFAULT false;
+
+CREATE TABLE job_posting_questions (
+    job_posting_id BIGINT NOT NULL REFERENCES job_postings(id) ON DELETE CASCADE,
+    question_id BIGINT NOT NULL REFERENCES questions(id) ON DELETE RESTRICT,
+    PRIMARY KEY (job_posting_id, question_id)
+);
+
+INSERT INTO job_posting_questions (job_posting_id, question_id)
+SELECT job_id, id FROM questions WHERE job_id IS NOT NULL;
+
+ALTER TABLE questions DROP COLUMN job_id;
+
+CREATE TABLE invitations (
+    id BIGSERIAL PRIMARY KEY,
+    job_id BIGINT NOT NULL REFERENCES job_postings(id) ON DELETE CASCADE,
+    participant_id BIGINT NOT NULL REFERENCES participants(id) ON DELETE CASCADE,
+    token VARCHAR(64) NOT NULL UNIQUE,
+    status VARCHAR(32) NOT NULL DEFAULT 'pending'
+        CHECK (status IN ('pending', 'accepted', 'completed')),
+    accepted_at TIMESTAMPTZ,
+    completed_at TIMESTAMPTZ,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE (job_id, participant_id)
+);
+
+CREATE TABLE invitation_answers (
+    id BIGSERIAL PRIMARY KEY,
+    invitation_id BIGINT NOT NULL REFERENCES invitations(id) ON DELETE CASCADE,
+    question_id BIGINT NOT NULL REFERENCES questions(id) ON DELETE RESTRICT,
+    answer TEXT NOT NULL,
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT now(),
+    UNIQUE (invitation_id, question_id)
+);
+
+-- +goose Down
+DROP TABLE IF EXISTS invitation_answers;
+DROP TABLE IF EXISTS invitations;
+ALTER TABLE questions ADD COLUMN job_id BIGINT REFERENCES job_postings(id) ON DELETE CASCADE;
+UPDATE questions q
+SET job_id = links.job_posting_id
+FROM (
+    SELECT question_id, min(job_posting_id) AS job_posting_id
+    FROM job_posting_questions
+    GROUP BY question_id
+) links
+WHERE links.question_id = q.id;
+DROP TABLE IF EXISTS job_posting_questions;
+ALTER TABLE questions DROP COLUMN deprecated;
+ALTER TABLE job_postings DROP COLUMN duration_minutes;
+ALTER TABLE job_postings DROP COLUMN status;