From 3f7f199cb940c8d5f6d48f77fd59971adffe49ef Mon Sep 17 00:00:00 2001
From: jacqueline <me@jacqueline.id.au>
Date: Thu, 7 Dec 2023 16:57:05 +1100
Subject: Remove pre-iterator concepts

 - No more IndexRecord/Result/dbGetPage nonsense
 - Queue is just track ids
 - i am so tired and have so much to do
---
 src/playlist/include/source.hpp | 157 ----------------------------------------
 1 file changed, 157 deletions(-)
 delete mode 100644 src/playlist/include/source.hpp

(limited to 'src/playlist/include/source.hpp')

diff --git a/src/playlist/include/source.hpp b/src/playlist/include/source.hpp
deleted file mode 100644
index ce12faf3..00000000
--- a/src/playlist/include/source.hpp
+++ /dev/null
@@ -1,157 +0,0 @@
-/*
- * Copyright 2023 jacqueline <me@jacqueline.id.au>
- *
- * SPDX-License-Identifier: GPL-3.0-only
- */
-
-#pragma once
-
-#include <deque>
-#include <memory>
-#include <mutex>
-#include <stack>
-#include <variant>
-#include <vector>
-
-#include "bloom_filter.hpp"
-#include "database.hpp"
-#include "future_fetcher.hpp"
-#include "random.hpp"
-#include "track.hpp"
-
-namespace playlist {
-
-/*
- * Stateful interface for iterating over a collection of tracks by id.
- */
-class ISource {
- public:
-  virtual ~ISource() {}
-
-  virtual auto Current() -> std::optional<database::TrackId> = 0;
-
-  /*
-   * Discards the current track id and continues to the next in this source.
-   * Returns the new current track id.
-   */
-  virtual auto Advance() -> std::optional<database::TrackId> = 0;
-
-  /*
-   * Repeatedly advances until a track with the given id is the current track.
-   * Returns false if this source ran out of tracks before the requested id
-   * was encounted, true otherwise.
-   */
-  virtual auto AdvanceTo(database::TrackId id) -> bool {
-    for (auto t = Current(); t.has_value(); t = Advance()) {
-      if (*t == id) {
-        return true;
-      }
-    }
-    return false;
-  }
-
-  /*
-   * Places the next n tracks into the given vector, in order. Does not change
-   * the value returned by Current().
-   */
-  virtual auto Peek(std::size_t n, std::vector<database::TrackId>*)
-      -> std::size_t = 0;
-};
-
-/*
- * A Source that supports restarting iteration from its original initial
- * value.
- */
-class IResetableSource : public ISource {
- public:
-  virtual ~IResetableSource() {}
-
-  virtual auto Previous() -> std::optional<database::TrackId> = 0;
-
-  /*
-   * Restarts iteration from this source's initial value.
-   */
-  virtual auto Reset() -> void = 0;
-};
-
-class IteratorSource : public IResetableSource {
- public:
-  IteratorSource(const database::Iterator&);
-
-  auto Current() -> std::optional<database::TrackId> override;
-  auto Advance() -> std::optional<database::TrackId> override;
-  auto Peek(std::size_t n, std::vector<database::TrackId>*)
-      -> std::size_t override;
-
-  auto Previous() -> std::optional<database::TrackId> override;
-  auto Reset() -> void override;
-
- private:
-  const database::Iterator& start_;
-  std::optional<database::TrackId> current_;
-  std::stack<database::Iterator, std::vector<database::Iterator>> next_;
-};
-
-auto CreateSourceFromResults(
-    std::weak_ptr<database::Database>,
-    std::shared_ptr<database::Result<database::IndexRecord>>)
-    -> std::shared_ptr<IResetableSource>;
-
-class IndexRecordSource : public IResetableSource {
- public:
-  IndexRecordSource(std::weak_ptr<database::Database> db,
-                    std::shared_ptr<database::Result<database::IndexRecord>>);
-
-  IndexRecordSource(std::weak_ptr<database::Database> db,
-                    std::shared_ptr<database::Result<database::IndexRecord>>,
-                    std::size_t,
-                    std::shared_ptr<database::Result<database::IndexRecord>>,
-                    std::size_t);
-
-  auto Current() -> std::optional<database::TrackId> override;
-  auto Advance() -> std::optional<database::TrackId> override;
-  auto Peek(std::size_t n, std::vector<database::TrackId>*)
-      -> std::size_t override;
-
-  auto Previous() -> std::optional<database::TrackId> override;
-  auto Reset() -> void override;
-
- private:
-  std::weak_ptr<database::Database> db_;
-
-  std::shared_ptr<database::Result<database::IndexRecord>> initial_page_;
-  ssize_t initial_item_;
-
-  std::shared_ptr<database::Result<database::IndexRecord>> current_page_;
-  ssize_t current_item_;
-};
-
-class NestedSource : public IResetableSource {
- public:
-  NestedSource(std::weak_ptr<database::Database> db,
-               std::shared_ptr<database::Result<database::IndexRecord>>);
-
-  auto Current() -> std::optional<database::TrackId> override;
-  auto Advance() -> std::optional<database::TrackId> override;
-  auto Peek(std::size_t n, std::vector<database::TrackId>*)
-      -> std::size_t override;
-
-  auto Previous() -> std::optional<database::TrackId> override;
-  auto Reset() -> void override;
-
- private:
-  auto CreateChild(std::shared_ptr<database::IndexRecord> page)
-      -> std::shared_ptr<IResetableSource>;
-
-  std::weak_ptr<database::Database> db_;
-
-  std::shared_ptr<database::Result<database::IndexRecord>> initial_page_;
-  ssize_t initial_item_;
-
-  std::shared_ptr<database::Result<database::IndexRecord>> current_page_;
-  ssize_t current_item_;
-
-  std::shared_ptr<IResetableSource> current_child_;
-};
-
-}  // namespace playlist
-- 
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