feat(quotesdb): add QuoteRepository trait, migrations, and thiserror dependency
- db/mod.rs: QuoteRepository async trait + ListResult/DeleteResult/DbError types - db/migrations.rs: SQL DDL strings for quotes, quote_tags, and indexes - lib.rs: fix rand 0.9 trait import (SliceRandom → IndexedRandom) - Cargo.toml: add thiserror = "2" for DbError derive Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>main
Elijah Voigt
3 months ago
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//! SQL migration strings for the `quotesdb` schema.
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//!
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//! These strings are run once on startup via [`super::QuoteRepository::run_migrations`].
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//! Both the `D1Repository` (WASM) and `NativeRepository` (native) execute these
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//! in sequence.
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/// Creates the `quotes` table if it does not already exist.
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///
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/// Stores one row per quote with all core fields. The `auth_code` is stored
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/// plaintext for simple passphrase-based ownership verification.
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pub const CREATE_QUOTES: &str = "\
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CREATE TABLE IF NOT EXISTS quotes (
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id TEXT PRIMARY KEY,
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text TEXT NOT NULL,
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author TEXT NOT NULL,
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source TEXT,
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date TEXT,
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auth_code TEXT NOT NULL,
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created_at TEXT NOT NULL DEFAULT (datetime('now')),
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updated_at TEXT NOT NULL DEFAULT (datetime('now'))
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)";
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/// Creates the `quote_tags` join table if it does not already exist.
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///
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/// Uses `ON DELETE CASCADE` so tags are removed automatically when a quote
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/// is deleted. The composite primary key prevents duplicate tags per quote.
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pub const CREATE_QUOTE_TAGS: &str = "\
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CREATE TABLE IF NOT EXISTS quote_tags (
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quote_id TEXT NOT NULL REFERENCES quotes(id) ON DELETE CASCADE,
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tag TEXT NOT NULL,
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PRIMARY KEY (quote_id, tag)
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)";
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/// Creates an index on `quote_tags.quote_id` to speed up tag lookups.
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pub const CREATE_TAG_INDEX: &str = "\
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CREATE INDEX IF NOT EXISTS idx_quote_tags_quote_id ON quote_tags(quote_id)";
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/// Creates a case-insensitive index on `quotes.author` for filter queries.
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pub const CREATE_AUTHOR_INDEX: &str = "\
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CREATE INDEX IF NOT EXISTS idx_quotes_author ON quotes(author COLLATE NOCASE)";
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//! Database abstraction layer for the `quotesdb` API.
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//!
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//! Provides the [`QuoteRepository`] async trait as a uniform interface over
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//! two backend implementations:
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//!
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//! - [`NativeRepository`] — `rusqlite` + `tokio-rusqlite` for native/test targets.
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//! - `D1Repository` — Cloudflare D1 via workers-rs for WASM/production targets.
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//!
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//! The correct implementation is selected at compile time via `cfg(target_arch)`.
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//! No feature flags or runtime branching are needed.
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pub mod migrations;
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#[cfg(not(target_arch = "wasm32"))]
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mod native;
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#[cfg(target_arch = "wasm32")]
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mod d1;
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#[cfg(not(target_arch = "wasm32"))]
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pub use native::NativeRepository;
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#[cfg(target_arch = "wasm32")]
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pub use d1::D1Repository;
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use serde::{Deserialize, Serialize};
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// ── Shared result types ───────────────────────────────────────────────────────
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/// A paginated list of quotes.
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///
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/// Returned by [`QuoteRepository::list_quotes`].
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#[derive(Debug, Clone, Serialize, Deserialize)]
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pub struct ListResult {
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/// The quotes on this page.
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pub quotes: Vec<crate::Quote>,
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/// Current page number (1-based).
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pub page: u32,
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/// Total number of pages.
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pub total_pages: u32,
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/// Total number of quotes matching the filter.
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pub total_count: u32,
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}
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/// Outcome of a delete operation.
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#[derive(Debug, PartialEq)]
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pub enum DeleteResult {
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/// The quote was deleted successfully.
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Deleted,
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/// No quote with the given ID exists.
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NotFound,
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/// The auth code did not match — deletion refused.
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Forbidden,
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}
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/// Errors returned by [`QuoteRepository`] methods.
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#[derive(Debug, thiserror::Error)]
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pub enum DbError {
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/// An internal database error occurred.
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#[error("database error: {0}")]
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Internal(String),
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/// The requested resource does not exist.
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#[error("not found")]
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NotFound,
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/// The operation is forbidden (wrong auth code).
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#[error("forbidden")]
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Forbidden,
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}
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// ── Trait ─────────────────────────────────────────────────────────────────────
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/// Async repository interface for all quote CRUD operations.
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///
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/// `?Send` is required because `D1Database` wraps JS values and is not `Send`.
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/// Both implementations satisfy this bound.
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///
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/// Implementations must be backed by a persistent store (SQLite for native,
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/// Cloudflare D1 for WASM). The caller holds the repository behind an `Arc`
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/// so it can be shared across Axum handler calls.
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#[async_trait::async_trait(?Send)]
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pub trait QuoteRepository {
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/// Run `CREATE TABLE IF NOT EXISTS` migrations.
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///
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/// Must be called once on startup before any other operations.
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async fn run_migrations(&self) -> Result<(), DbError>;
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/// List quotes with optional filtering and pagination.
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///
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/// Page numbers are 1-based. Returns an empty `quotes` vec when `page`
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/// is beyond the last page.
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async fn list_quotes(
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&self,
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page: u32,
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author: Option<&str>,
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tag: Option<&str>,
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) -> Result<ListResult, DbError>;
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/// Retrieve a single quote by its ID.
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///
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/// Returns `Ok(None)` when no quote with the given ID exists.
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async fn get_quote(&self, id: &str) -> Result<Option<crate::Quote>, DbError>;
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/// Return a single random quote.
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///
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/// Returns `Ok(None)` when the database is empty.
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async fn get_random_quote(&self) -> Result<Option<crate::Quote>, DbError>;
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/// Create a new quote.
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///
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/// If `input.auth_code` is `None`, a 4-word passphrase is auto-generated.
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/// Returns the stored quote (without auth_code) and the auth_code string.
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async fn create_quote(
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&self,
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input: crate::CreateQuoteInput,
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) -> Result<(crate::Quote, String), DbError>;
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/// Update an existing quote.
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///
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/// The `auth_code` header value must match `quotes.auth_code`.
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/// Returns `Err(DbError::NotFound)` if the ID does not exist.
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/// Returns `Err(DbError::Forbidden)` if the auth code does not match.
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async fn update_quote(
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&self,
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id: &str,
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input: crate::UpdateQuoteInput,
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auth_code: &str,
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) -> Result<crate::Quote, DbError>;
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/// Delete a quote by ID.
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///
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/// The `auth_code` header value must match `quotes.auth_code`.
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/// Tags are removed automatically via `ON DELETE CASCADE`.
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async fn delete_quote(&self, id: &str, auth_code: &str) -> Result<DeleteResult, DbError>;
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}
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