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17 lines
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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Profile switch orchestration, as a plan rather than a procedure."><title>jellytau_lib::profiles::switch - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-17e0aaed.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="jellytau_lib" data-themes="" data-resource-suffix="" data-rustdoc-version="1.97.1 (8bab26f4f 2026-07-14)" data-channel="1.97.1" data-search-js="search-fd9372ac.js" data-stringdex-js="stringdex-2da4960a.js" data-settings-js="settings-170eb4bf.js" ><script src="../../../static.files/storage-41dd4d93.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../../static.files/main-fcd733ba.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-f7c3ffd8.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc mod"><a class="skip-main-content" href="#main-content">Skip to main content</a><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Module switch</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../jellytau_lib/index.html">jellytau_<wbr>lib</a><span class="version">0.11.5</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module switch</a></h2><h3><a href="#enums">Module Items</a></h3><ul class="block"><li><a href="#enums" title="Enums">Enums</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="../index.html">In jellytau_<wbr>lib::<wbr>profiles</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content" tabindex="-1"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../../index.html">jellytau_lib</a>::<wbr><a href="../index.html">profiles</a></div><h1>Module <span>switch</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../../src/jellytau_lib/profiles/switch.rs.html#1-225">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Profile switch orchestration, as a plan rather than a procedure.</p>
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<p>Switching profiles tears down and rebuilds nearly everything the app holds:
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the player and its queue, the sync queue drain, the session poller, the
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lockscreen metadata, the repository handle. The <em>ordering</em> of that teardown
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is a correctness invariant, not an implementation detail — a straggler that
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reports after the active user has flipped attributes one account’s viewing to
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another, which is silent, plausible-looking, and unrecoverable.</p>
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<p>So the ordering lives here as a pure function returning a list of steps, and
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the command layer executes them. That is the only way this gets tested: an
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end-to-end switch needs two real accounts on a real server, which CI does not
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have and never will. The plan needs nothing.</p>
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<p>Two hazards worth remembering while executing a plan, both already paid for
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elsewhere in this codebase (see CLAUDE.md): never call a blocking API from a
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player event callback, and never hold a lock across a <code>match</code> scrutinee. A
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teardown reaches every one of those paths at once, from a new direction.</p>
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<p>TRACES: UR-082 | DR-270</p>
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</div></details><h2 id="enums" class="section-header">Enums<a href="#enums" class="anchor">§</a></h2><dl class="item-table"><dt><a class="enum" href="enum.SwitchStep.html" title="enum jellytau_lib::profiles::switch::SwitchStep">Switch<wbr>Step</a></dt><dd>One executable step of a switch.</dd></dl><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.plan.html" title="fn jellytau_lib::profiles::switch::plan">plan</a></dt><dd>Build the ordered plan for moving from <code>from</code> to <code>to</code>.</dd></dl></section></div></main></body></html> |