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</pre><div class="example-wrap"><pre class="rust ">
<span class="doccomment">//! Generate paths for different A/B Street files</span>

<span class="kw">use</span> <span class="ident">anyhow</span>::<span class="prelude-ty">Result</span>;
<span class="kw">use</span> <span class="ident">serde</span>::{<span class="ident">Deserialize</span>, <span class="ident">Serialize</span>};

<span class="kw">use</span> <span class="ident">abstutil</span>::<span class="ident">basename</span>;

<span class="kw">use</span> <span class="kw">crate</span>::{<span class="ident">file_exists</span>, <span class="ident">list_all_objects</span>};

<span class="ident">lazy_static</span>::<span class="macro">lazy_static</span><span class="macro">!</span> {
    <span class="kw">static</span> <span class="kw-2">ref</span> <span class="ident">ROOT_DIR</span>: <span class="ident">String</span> <span class="op">=</span> {
        <span class="comment">// If you&#39;re packaging for a release and need the data directory to be in some fixed</span>
        <span class="comment">// location: ABST_DATA_DIR=/some/path cargo build ...</span>
        <span class="kw">if</span> <span class="kw">let</span> <span class="prelude-val">Some</span>(<span class="ident">dir</span>) <span class="op">=</span> <span class="macro">option_env</span><span class="macro">!</span>(<span class="string">&quot;ABST_DATA_DIR&quot;</span>) {
            <span class="ident">dir</span>.<span class="ident">trim_end_matches</span>(<span class="string">&#39;/&#39;</span>).<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;wasm32&quot;</span>) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;../data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;../../data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;../../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> {
            <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t find the data/ directory&quot;</span>);
        }
    };

    <span class="kw">static</span> <span class="kw-2">ref</span> <span class="ident">ROOT_PLAYER_DIR</span>: <span class="ident">String</span> <span class="op">=</span> {
        <span class="comment">// If you&#39;re packaging for a release and want the player&#39;s local data directory to be</span>
        <span class="comment">// $HOME/.abstreet, set ABST_PLAYER_HOME_DIR=1</span>
        <span class="kw">if</span> <span class="macro">option_env</span><span class="macro">!</span>(<span class="string">&quot;ABST_PLAYER_HOME_DIR&quot;</span>).<span class="ident">is_some</span>() {
            <span class="kw">match</span> <span class="ident">std</span>::<span class="ident">env</span>::<span class="ident">var</span>(<span class="string">&quot;HOME&quot;</span>) {
                <span class="prelude-val">Ok</span>(<span class="ident">dir</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/.abstreet&quot;</span>, <span class="ident">dir</span>.<span class="ident">trim_end_matches</span>(<span class="string">&#39;/&#39;</span>)),
                <span class="prelude-val">Err</span>(<span class="ident">err</span>) <span class="op">=</span><span class="op">&gt;</span> <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;This build of A/B Street stores player data in $HOME/.abstreet, but $HOME isn&#39;t set: {}&quot;</span>, <span class="ident">err</span>),
            }
        } <span class="kw">else</span> <span class="kw">if</span> <span class="macro">cfg</span><span class="macro">!</span>(<span class="ident">target_arch</span> <span class="op">=</span> <span class="string">&quot;wasm32&quot;</span>) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;../data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="string">&quot;../../data/&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="string">&quot;../../data&quot;</span>.<span class="ident">to_string</span>()
        } <span class="kw">else</span> {
            <span class="macro">panic</span><span class="macro">!</span>(<span class="string">&quot;Can&#39;t find the data/ directory&quot;</span>);
        }
    };
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path</span><span class="op">&lt;</span><span class="ident">I</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span>(<span class="ident">p</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="kw">let</span> <span class="ident">p</span> <span class="op">=</span> <span class="ident">p</span>.<span class="ident">into</span>();
    <span class="kw">if</span> <span class="ident">p</span>.<span class="ident">starts_with</span>(<span class="string">&quot;player/&quot;</span>) {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/{}&quot;</span>, <span class="kw-2">*</span><span class="ident">ROOT_PLAYER_DIR</span>, <span class="ident">p</span>)
    } <span class="kw">else</span> {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/{}&quot;</span>, <span class="kw-2">*</span><span class="ident">ROOT_DIR</span>, <span class="ident">p</span>)
    }
}

<span class="doccomment">/// A single city is identified using this.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">CityName</span> {
    <span class="doccomment">/// A two letter lowercase country code, from https://en.wikipedia.org/wiki/ISO_3166-1_alpha-2.</span>
    <span class="doccomment">/// To represent imaginary/test cities, use the code `zz`.</span>
    <span class="kw">pub</span> <span class="ident">country</span>: <span class="ident">String</span>,
    <span class="doccomment">/// The name of the city, in filename-friendly form -- for example, &quot;tel_aviv&quot;.</span>
    <span class="kw">pub</span> <span class="ident">city</span>: <span class="ident">String</span>,
}

<span class="kw">impl</span> <span class="ident">CityName</span> {
    <span class="doccomment">/// Create a CityName from a country code and city.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">country</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">city</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">CityName</span> {
        <span class="kw">if</span> <span class="ident">country</span>.<span class="ident">len</span>() <span class="op">!</span><span class="op">=</span> <span class="number">2</span> {
            <span class="macro">panic</span><span class="macro">!</span>(
                <span class="string">&quot;CityName::new({}, {}) has a country code that isn&#39;t two letters&quot;</span>,
                <span class="ident">country</span>, <span class="ident">city</span>
            );
        }
        <span class="ident">CityName</span> {
            <span class="ident">country</span>: <span class="ident">country</span>.<span class="ident">to_string</span>(),
            <span class="ident">city</span>: <span class="ident">city</span>.<span class="ident">to_string</span>(),
        }
    }

    <span class="doccomment">/// Convenient constructor for the main city of the game.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">seattle</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">CityName</span> {
        <span class="ident">CityName</span>::<span class="ident">new</span>(<span class="string">&quot;us&quot;</span>, <span class="string">&quot;seattle&quot;</span>)
    }

    <span class="doccomment">/// Returns all city names based on system data.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">list_all_cities_from_system_data</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">CityName</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cities</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">country</span> <span class="kw">in</span> <span class="ident">list_all_objects</span>(<span class="ident">path</span>(<span class="string">&quot;system&quot;</span>)) {
            <span class="kw">if</span> <span class="ident">country</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;assets&quot;</span>
                <span class="op">|</span><span class="op">|</span> <span class="ident">country</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;extra_fonts&quot;</span>
                <span class="op">|</span><span class="op">|</span> <span class="ident">country</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;proposals&quot;</span>
                <span class="op">|</span><span class="op">|</span> <span class="ident">country</span> <span class="op">=</span><span class="op">=</span> <span class="string">&quot;study_areas&quot;</span>
            {
                <span class="kw">continue</span>;
            }
            <span class="kw">for</span> <span class="ident">city</span> <span class="kw">in</span> <span class="ident">list_all_objects</span>(<span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;system/{}&quot;</span>, <span class="ident">country</span>))) {
                <span class="ident">cities</span>.<span class="ident">push</span>(<span class="ident">CityName</span>::<span class="ident">new</span>(<span class="kw-2">&amp;</span><span class="ident">country</span>, <span class="kw-2">&amp;</span><span class="ident">city</span>));
            }
        }
        <span class="ident">cities</span>
    }

    <span class="doccomment">/// Returns all city names based on importer config.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">list_all_cities_from_importer_config</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">CityName</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">cities</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">country</span> <span class="kw">in</span> <span class="ident">list_all_objects</span>(<span class="string">&quot;importer/config&quot;</span>.<span class="ident">to_string</span>()) {
            <span class="kw">for</span> <span class="ident">city</span> <span class="kw">in</span> <span class="ident">list_all_objects</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;importer/config/{}&quot;</span>, <span class="ident">country</span>)) {
                <span class="ident">cities</span>.<span class="ident">push</span>(<span class="ident">CityName</span>::<span class="ident">new</span>(<span class="kw-2">&amp;</span><span class="ident">country</span>, <span class="kw-2">&amp;</span><span class="ident">city</span>));
            }
        }
        <span class="ident">cities</span>
    }

    <span class="doccomment">/// Parses a CityName from something like &quot;gb/london&quot;; the inverse of `to_path`.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse</span>(<span class="ident">x</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Result</span><span class="op">&lt;</span><span class="ident">CityName</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="ident">parts</span> <span class="op">=</span> <span class="ident">x</span>.<span class="ident">split</span>(<span class="string">&quot;/&quot;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>();
        <span class="kw">if</span> <span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">!</span><span class="op">=</span> <span class="number">2</span> <span class="op">|</span><span class="op">|</span> <span class="ident">parts</span>[<span class="number">0</span>].<span class="ident">len</span>() <span class="op">!</span><span class="op">=</span> <span class="number">2</span> {
            <span class="macro">bail</span><span class="macro">!</span>(<span class="string">&quot;Bad CityName {}&quot;</span>, <span class="ident">x</span>);
        }
        <span class="prelude-val">Ok</span>(<span class="ident">CityName</span>::<span class="ident">new</span>(<span class="ident">parts</span>[<span class="number">0</span>], <span class="ident">parts</span>[<span class="number">1</span>]))
    }

    <span class="doccomment">/// Expresses the city as a path, like &quot;gb/london&quot;; the inverse of `parse`.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">to_path</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}/{}&quot;</span>, <span class="self">self</span>.<span class="ident">country</span>, <span class="self">self</span>.<span class="ident">city</span>)
    }

    <span class="doccomment">/// Stringify the city name for debug messages. Don&#39;t implement `std::fmt::Display`, to force</span>
    <span class="doccomment">/// callers to explicitly opt into this description, which could change.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">describe</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{} ({})&quot;</span>, <span class="self">self</span>.<span class="ident">city</span>, <span class="self">self</span>.<span class="ident">country</span>)
    }

    <span class="doccomment">/// Constructs the path to some city-scoped data/input.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">input_path</span><span class="op">&lt;</span><span class="ident">I</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span>(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="ident">file</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
        <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
            <span class="string">&quot;input/{}/{}/{}&quot;</span>,
            <span class="self">self</span>.<span class="ident">country</span>,
            <span class="self">self</span>.<span class="ident">city</span>,
            <span class="ident">file</span>.<span class="ident">into</span>()
        ))
    }
}

<span class="doccomment">/// A single map is identified using this.</span>
<span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>, <span class="ident">Debug</span>, <span class="ident">PartialEq</span>, <span class="ident">Eq</span>, <span class="ident">PartialOrd</span>, <span class="ident">Ord</span>, <span class="ident">Serialize</span>, <span class="ident">Deserialize</span>)]</span>
<span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">MapName</span> {
    <span class="kw">pub</span> <span class="ident">city</span>: <span class="ident">CityName</span>,
    <span class="doccomment">/// The name of the map within the city, in filename-friendly form -- for example, &quot;downtown&quot;</span>
    <span class="kw">pub</span> <span class="ident">map</span>: <span class="ident">String</span>,
}

<span class="kw">impl</span> <span class="ident">MapName</span> {
    <span class="doccomment">/// Create a MapName from a country code, city, and map name.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">country</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">city</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">MapName</span> {
        <span class="ident">MapName</span> {
            <span class="ident">city</span>: <span class="ident">CityName</span>::<span class="ident">new</span>(<span class="ident">country</span>, <span class="ident">city</span>),
            <span class="ident">map</span>: <span class="ident">map</span>.<span class="ident">to_string</span>(),
        }
    }

    <span class="doccomment">/// Create a MapName from a city and map within that city.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_city</span>(<span class="ident">city</span>: <span class="kw-2">&amp;</span><span class="ident">CityName</span>, <span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">MapName</span> {
        <span class="ident">MapName</span>::<span class="ident">new</span>(<span class="kw-2">&amp;</span><span class="ident">city</span>.<span class="ident">country</span>, <span class="kw-2">&amp;</span><span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">map</span>)
    }

    <span class="doccomment">/// Convenient constructor for the main city of the game.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">seattle</span>(<span class="ident">map</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">MapName</span> {
        <span class="ident">MapName</span>::<span class="ident">new</span>(<span class="string">&quot;us&quot;</span>, <span class="string">&quot;seattle&quot;</span>, <span class="ident">map</span>)
    }

    <span class="doccomment">/// Stringify the map name for debug messages. Don&#39;t implement `std::fmt::Display`, to force</span>
    <span class="doccomment">/// callers to explicitly opt into this description, which could change.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">describe</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
        <span class="macro">format</span><span class="macro">!</span>(
            <span class="string">&quot;{} (in {} ({}))&quot;</span>,
            <span class="self">self</span>.<span class="ident">map</span>, <span class="self">self</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="self">self</span>.<span class="ident">city</span>.<span class="ident">country</span>
        )
    }

    <span class="doccomment">/// Stringify the map name for filenames.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">as_filename</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
        <span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;{}_{}_{}&quot;</span>, <span class="self">self</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="self">self</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="self">self</span>.<span class="ident">map</span>)
    }

    <span class="doccomment">/// Transforms a path to a map back to a MapName. Returns `None` if the input is strange.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">from_path</span>(<span class="ident">path</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="prelude-ty">Option</span><span class="op">&lt;</span><span class="ident">MapName</span><span class="op">&gt;</span> {
        <span class="comment">// TODO regex</span>
        <span class="kw">let</span> <span class="ident">parts</span> <span class="op">=</span> <span class="ident">path</span>.<span class="ident">split</span>(<span class="string">&quot;/&quot;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>();
        <span class="kw">if</span> <span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">&lt;</span> <span class="number">4</span> {
            <span class="kw">return</span> <span class="prelude-val">None</span>;
        }
        <span class="kw">let</span> <span class="ident">country</span> <span class="op">=</span> <span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">4</span>];
        <span class="kw">let</span> <span class="ident">city</span> <span class="op">=</span> <span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">3</span>];
        <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">basename</span>(<span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span>]);
        <span class="prelude-val">Some</span>(<span class="ident">MapName</span>::<span class="ident">new</span>(<span class="ident">country</span>, <span class="ident">city</span>, <span class="kw-2">&amp;</span><span class="ident">map</span>))
    }

    <span class="doccomment">/// Returns the filesystem path to this map.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path</span>(<span class="kw-2">&amp;</span><span class="self">self</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
        <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
            <span class="string">&quot;system/{}/{}/maps/{}.bin&quot;</span>,
            <span class="self">self</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="self">self</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="self">self</span>.<span class="ident">map</span>
        ))
    }

    <span class="doccomment">/// Returns all maps from one city.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">list_all_maps_in_city</span>(<span class="ident">city</span>: <span class="kw-2">&amp;</span><span class="ident">CityName</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">MapName</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">names</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">map</span> <span class="kw">in</span> <span class="ident">list_all_objects</span>(<span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;system/{}/{}/maps&quot;</span>, <span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">city</span>.<span class="ident">city</span>))) {
            <span class="ident">names</span>.<span class="ident">push</span>(<span class="ident">MapName</span> {
                <span class="ident">city</span>: <span class="ident">city</span>.<span class="ident">clone</span>(),
                <span class="ident">map</span>,
            });
        }
        <span class="ident">names</span>
    }

    <span class="doccomment">/// Returns all maps from all cities, using system data.</span>
    <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">list_all_maps</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">Vec</span><span class="op">&lt;</span><span class="ident">MapName</span><span class="op">&gt;</span> {
        <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">names</span> <span class="op">=</span> <span class="ident">Vec</span>::<span class="ident">new</span>();
        <span class="kw">for</span> <span class="ident">city</span> <span class="kw">in</span> <span class="ident">CityName</span>::<span class="ident">list_all_cities_from_system_data</span>() {
            <span class="ident">names</span>.<span class="ident">extend</span>(<span class="ident">MapName</span>::<span class="ident">list_all_maps_in_city</span>(<span class="kw-2">&amp;</span><span class="ident">city</span>));
        }
        <span class="ident">names</span>
    }
}

<span class="comment">// System data (Players can&#39;t edit, needed at runtime)</span>

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_prebaked_results</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>, <span class="ident">scenario_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/{}/{}/prebaked_results/{}/{}.bin&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>, <span class="ident">scenario_name</span>
    ))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_scenario</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>, <span class="ident">scenario_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="comment">// TODO Getting complicated. Sometimes we&#39;re trying to load, so we should look for .bin, then</span>
    <span class="comment">// .json. But when we&#39;re writing a custom scenario, we actually want to write a .bin.</span>
    <span class="kw">let</span> <span class="ident">bin</span> <span class="op">=</span> <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/{}/{}/scenarios/{}/{}.bin&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>, <span class="ident">scenario_name</span>
    ));
    <span class="kw">let</span> <span class="ident">json</span> <span class="op">=</span> <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/{}/{}/scenarios/{}/{}.json&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>, <span class="ident">scenario_name</span>
    ));
    <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="kw-2">&amp;</span><span class="ident">bin</span>) {
        <span class="kw">return</span> <span class="ident">bin</span>;
    }
    <span class="kw">if</span> <span class="ident">file_exists</span>(<span class="kw-2">&amp;</span><span class="ident">json</span>) {
        <span class="kw">return</span> <span class="ident">json</span>;
    }
    <span class="ident">bin</span>
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_scenarios</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;system/{}/{}/scenarios/{}&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>
    ))
}

<span class="doccomment">/// Extract the map and scenario name from a path. Crashes if the input is strange.</span>
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">parse_scenario_path</span>(<span class="ident">path</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> (<span class="ident">MapName</span>, <span class="ident">String</span>) {
    <span class="comment">// TODO regex</span>
    <span class="kw">let</span> <span class="ident">parts</span> <span class="op">=</span> <span class="ident">path</span>.<span class="ident">split</span>(<span class="string">&quot;/&quot;</span>).<span class="ident">collect</span>::<span class="op">&lt;</span><span class="ident">Vec</span><span class="op">&lt;</span><span class="kw">_</span><span class="op">&gt;</span><span class="op">&gt;</span>();
    <span class="kw">let</span> <span class="ident">country</span> <span class="op">=</span> <span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">5</span>];
    <span class="kw">let</span> <span class="ident">city</span> <span class="op">=</span> <span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">4</span>];
    <span class="kw">let</span> <span class="ident">map</span> <span class="op">=</span> <span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">2</span>];
    <span class="kw">let</span> <span class="ident">scenario</span> <span class="op">=</span> <span class="ident">basename</span>(<span class="ident">parts</span>[<span class="ident">parts</span>.<span class="ident">len</span>() <span class="op">-</span> <span class="number">1</span>]);
    <span class="kw">let</span> <span class="ident">map_name</span> <span class="op">=</span> <span class="ident">MapName</span>::<span class="ident">new</span>(<span class="ident">country</span>, <span class="ident">city</span>, <span class="ident">map</span>);
    (<span class="ident">map_name</span>, <span class="ident">scenario</span>)
}

<span class="comment">// Player data (Players edit this)</span>

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_player</span><span class="op">&lt;</span><span class="ident">I</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span>(<span class="ident">p</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;player/{}&quot;</span>, <span class="ident">p</span>.<span class="ident">into</span>()))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_camera_state</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/camera_state/{}/{}/{}.json&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>
    ))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_edits</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>, <span class="ident">edits_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/edits/{}/{}/{}/{}.json&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>, <span class="ident">edits_name</span>
    ))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_edits</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/edits/{}/{}/{}&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>
    ))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_save</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>, <span class="ident">edits_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">run_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">time</span>: <span class="ident">String</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/saves/{}/{}/{}/{}_{}/{}.bin&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>, <span class="ident">edits_name</span>, <span class="ident">run_name</span>, <span class="ident">time</span>
    ))
}
<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_all_saves</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>, <span class="ident">edits_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>, <span class="ident">run_name</span>: <span class="kw-2">&amp;</span><span class="ident">str</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;player/saves/{}/{}/{}/{}_{}&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>, <span class="ident">edits_name</span>, <span class="ident">run_name</span>
    ))
}

<span class="comment">// Input data (For developers to build maps, not needed at runtime)</span>

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_popdat</span>() <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="string">&quot;input/us/seattle/popdat.bin&quot;</span>)
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_raw_map</span>(<span class="ident">name</span>: <span class="kw-2">&amp;</span><span class="ident">MapName</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(
        <span class="string">&quot;input/{}/{}/raw_maps/{}.bin&quot;</span>,
        <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">country</span>, <span class="ident">name</span>.<span class="ident">city</span>.<span class="ident">city</span>, <span class="ident">name</span>.<span class="ident">map</span>
    ))
}

<span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">path_shared_input</span><span class="op">&lt;</span><span class="ident">I</span>: <span class="ident">Into</span><span class="op">&lt;</span><span class="ident">String</span><span class="op">&gt;</span><span class="op">&gt;</span>(<span class="ident">i</span>: <span class="ident">I</span>) <span class="op">-</span><span class="op">&gt;</span> <span class="ident">String</span> {
    <span class="ident">path</span>(<span class="macro">format</span><span class="macro">!</span>(<span class="string">&quot;input/shared/{}&quot;</span>, <span class="ident">i</span>.<span class="ident">into</span>()))
}
</pre></div>
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