<!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="Source of the Rust file `src\chars\processing.rs`."><title>processing.rs - source</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-ca0dd0c4.css"><script id="default-settings"
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<a href=#2 id=2 data-nosnippet>2</a>///
<a href=#3 id=3 data-nosnippet>3</a>/// This module provides JSON processing, parallel string operations,
<a href=#4 id=4 data-nosnippet>4</a>/// and asynchronous file I/O for strings, leveraging serde for serialization,
<a href=#5 id=5 data-nosnippet>5</a>/// parallel processing capabilities, and async file operations.
<a href=#6 id=6 data-nosnippet>6</a></span><span class="comment">// Standard library imports
<a href=#7 id=7 data-nosnippet>7</a>// External crate imports
<a href=#8 id=8 data-nosnippet>8</a></span><span class="kw">use </span>futures_lite::{AsyncReadExt, AsyncWriteExt};
<a href=#9 id=9 data-nosnippet>9</a><span class="kw">use </span>serde_json;
<a href=#10 id=10 data-nosnippet>10</a><span class="kw">use </span>smol::fs;
<a href=#11 id=11 data-nosnippet>11</a>
<a href=#12 id=12 data-nosnippet>12</a><span class="doccomment">/// Convenience: Parse JSON and validate
<a href=#13 id=13 data-nosnippet>13</a>///
<a href=#14 id=14 data-nosnippet>14</a>/// # Errors
<a href=#15 id=15 data-nosnippet>15</a>///
<a href=#16 id=16 data-nosnippet>16</a>/// Returns a `serde_json::Error` if parsing fails.
<a href=#17 id=17 data-nosnippet>17</a></span><span class="kw">pub fn </span>parse_and_validate_json<T: <span class="kw">for</span><<span class="lifetime">'de</span>> serde::Deserialize<<span class="lifetime">'de</span>>>(
<a href=#18 id=18 data-nosnippet>18</a> s: <span class="kw-2">&</span>str,
<a href=#19 id=19 data-nosnippet>19</a>) -> <span class="prelude-ty">Result</span><T, serde_json::Error> {
<a href=#20 id=20 data-nosnippet>20</a> <span class="kw">let </span>value: T = <span class="kw">crate</span>::serde::parse_json_value(s)<span class="question-mark">?</span>;
<a href=#21 id=21 data-nosnippet>21</a> <span class="comment">// Could add validation logic here
<a href=#22 id=22 data-nosnippet>22</a> </span><span class="prelude-val">Ok</span>(value)
<a href=#23 id=23 data-nosnippet>23</a>}
<a href=#24 id=24 data-nosnippet>24</a>
<a href=#25 id=25 data-nosnippet>25</a><span class="doccomment">/// Result type alias for processing operations
<a href=#26 id=26 data-nosnippet>26</a></span><span class="kw">pub type </span>ProcessingResult<T> = <span class="prelude-ty">Result</span><T, serde_json::Error>;
<a href=#27 id=27 data-nosnippet>27</a>
<a href=#28 id=28 data-nosnippet>28</a><span class="doccomment">/// Parallel string processing: split string and process chunks
<a href=#29 id=29 data-nosnippet>29</a></span><span class="kw">pub fn </span>parallel_process_string<F, R>(s: <span class="kw-2">&</span>str, chunk_size: usize, processor: F) -> Vec<R>
<a href=#30 id=30 data-nosnippet>30</a><span class="kw">where
<a href=#31 id=31 data-nosnippet>31</a> </span>F: Fn(<span class="kw-2">&</span>str) -> R + Send + Sync,
<a href=#32 id=32 data-nosnippet>32</a> R: Send,
<a href=#33 id=33 data-nosnippet>33</a>{
<a href=#34 id=34 data-nosnippet>34</a> <span class="kw">let </span>chunks: Vec<<span class="kw-2">&</span>str> = s
<a href=#35 id=35 data-nosnippet>35</a> .as_bytes()
<a href=#36 id=36 data-nosnippet>36</a> .chunks(chunk_size)
<a href=#37 id=37 data-nosnippet>37</a> .map(|chunk| std::str::from_utf8(chunk).unwrap_or(<span class="string">""</span>))
<a href=#38 id=38 data-nosnippet>38</a> .collect();
<a href=#39 id=39 data-nosnippet>39</a>
<a href=#40 id=40 data-nosnippet>40</a> chunks.into_iter().map(processor).collect()
<a href=#41 id=41 data-nosnippet>41</a>}
<a href=#42 id=42 data-nosnippet>42</a>
<a href=#43 id=43 data-nosnippet>43</a><span class="doccomment">/// Asynchronously read a file to string
<a href=#44 id=44 data-nosnippet>44</a>///
<a href=#45 id=45 data-nosnippet>45</a>/// # Errors
<a href=#46 id=46 data-nosnippet>46</a>///
<a href=#47 id=47 data-nosnippet>47</a>/// Returns an `std::io::Error` if the file cannot be opened or read.
<a href=#48 id=48 data-nosnippet>48</a></span><span class="kw">pub async fn </span>read_file_to_string_async(path: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><String, std::io::Error> {
<a href=#49 id=49 data-nosnippet>49</a> <span class="kw">let </span><span class="kw-2">mut </span>file = fs::File::open(path).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#50 id=50 data-nosnippet>50</a> <span class="kw">let </span><span class="kw-2">mut </span>contents = String::new();
<a href=#51 id=51 data-nosnippet>51</a> file.read_to_string(<span class="kw-2">&mut </span>contents).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#52 id=52 data-nosnippet>52</a> <span class="prelude-val">Ok</span>(contents)
<a href=#53 id=53 data-nosnippet>53</a>}
<a href=#54 id=54 data-nosnippet>54</a>
<a href=#55 id=55 data-nosnippet>55</a><span class="doccomment">/// Asynchronously write string to file
<a href=#56 id=56 data-nosnippet>56</a>///
<a href=#57 id=57 data-nosnippet>57</a>/// # Errors
<a href=#58 id=58 data-nosnippet>58</a>///
<a href=#59 id=59 data-nosnippet>59</a>/// Returns an `std::io::Error` if the file cannot be created or written to.
<a href=#60 id=60 data-nosnippet>60</a></span><span class="kw">pub async fn </span>write_string_to_file_async(path: <span class="kw-2">&</span>str, contents: <span class="kw-2">&</span>str) -> <span class="prelude-ty">Result</span><(), std::io::Error> {
<a href=#61 id=61 data-nosnippet>61</a> <span class="kw">let </span><span class="kw-2">mut </span>file = fs::File::create(path).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#62 id=62 data-nosnippet>62</a> file.write_all(contents.as_bytes()).<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#63 id=63 data-nosnippet>63</a> file.flush().<span class="kw">await</span><span class="question-mark">?</span>;
<a href=#64 id=64 data-nosnippet>64</a> <span class="prelude-val">Ok</span>(())
<a href=#65 id=65 data-nosnippet>65</a>}
<a href=#66 id=66 data-nosnippet>66</a>
<a href=#67 id=67 data-nosnippet>67</a><span class="doccomment">/// Extract all JSON values by key from a JSON array string
<a href=#68 id=68 data-nosnippet>68</a>///
<a href=#69 id=69 data-nosnippet>69</a>/// # Errors
<a href=#70 id=70 data-nosnippet>70</a>///
<a href=#71 id=71 data-nosnippet>71</a>/// Returns an error if the input is not valid JSON or if parsing fails.
<a href=#72 id=72 data-nosnippet>72</a></span><span class="kw">pub fn </span>extract_json_values_by_key(
<a href=#73 id=73 data-nosnippet>73</a> json_array: <span class="kw-2">&</span>str,
<a href=#74 id=74 data-nosnippet>74</a> key: <span class="kw-2">&</span>str,
<a href=#75 id=75 data-nosnippet>75</a>) -> <span class="prelude-ty">Result</span><Vec<serde_json::Value>, Box<<span class="kw">dyn </span>std::error::Error>> {
<a href=#76 id=76 data-nosnippet>76</a> <span class="kw">let </span>array: Vec<serde_json::Value> = serde_json::from_str(json_array)<span class="question-mark">?</span>;
<a href=#77 id=77 data-nosnippet>77</a> <span class="kw">let </span><span class="kw-2">mut </span>results = Vec::new();
<a href=#78 id=78 data-nosnippet>78</a>
<a href=#79 id=79 data-nosnippet>79</a> <span class="kw">for </span>item <span class="kw">in </span>array {
<a href=#80 id=80 data-nosnippet>80</a> <span class="kw">if let </span><span class="prelude-val">Some</span>(obj) = item.as_object()
<a href=#81 id=81 data-nosnippet>81</a> && <span class="kw">let </span><span class="prelude-val">Some</span>(value) = obj.get(key)
<a href=#82 id=82 data-nosnippet>82</a> {
<a href=#83 id=83 data-nosnippet>83</a> results.push(value.clone());
<a href=#84 id=84 data-nosnippet>84</a> }
<a href=#85 id=85 data-nosnippet>85</a> }
<a href=#86 id=86 data-nosnippet>86</a>
<a href=#87 id=87 data-nosnippet>87</a> <span class="prelude-val">Ok</span>(results)
<a href=#88 id=88 data-nosnippet>88</a>}</code></pre></div></section></main></body></html>