278 lines
8.8 KiB
Rust
278 lines
8.8 KiB
Rust
extern crate async_zip;
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extern crate json;
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extern crate tokio;
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use async_zip::read::fs::ZipFileReader;
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use std::path::PathBuf;
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use std::str::FromStr;
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use tokio::{fs, task};
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use tokio::io::{AsyncBufReadExt, AsyncReadExt, AsyncWriteExt, BufReader};
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const BASE_FILENAME: &str = "baza_utf8.zip";
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const OUTPUT_PATH: &str = "json";
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#[derive(Debug, Clone, Copy)]
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enum KeywordType {
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Ignore,
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Global,
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QuestionPre,
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QuestionStart,
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QuestionContent,
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CurrentScope,
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}
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#[derive(Debug, Clone, Copy)]
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enum DataScope {
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Global,
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QuestionPre,
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QuestionContent,
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}
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struct Context {
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// global output value
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data: json::JsonValue,
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// temp questions array
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questions: json::JsonValue,
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cur_keyword_type: Option<KeywordType>,
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// temp question value
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cur_question: json::JsonValue,
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// temp value for pre'question fields
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cur_question_pre: json::JsonValue,
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// scope for data fields
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cur_scope: DataScope,
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// curent json key
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cur_tag: String,
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// current json value
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cur_content: Vec<String>,
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// need to push temp question value if true
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have_new_question: bool,
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// prev. keyword type
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last_keyword_type: Option<KeywordType>,
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// prev. json key (used for store acummulated content when new keyword readed)
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last_tag: String,
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}
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// check questions before push
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trait PushIfValid {
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fn is_valid(&self) -> bool;
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fn push_if_valid(&mut self, value: json::JsonValue);
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}
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impl PushIfValid for json::JsonValue {
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fn is_valid(&self) -> bool {
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self.has_key("Вопрос") && self.has_key("Ответ")
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}
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fn push_if_valid(&mut self, value: json::JsonValue) {
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if value.is_valid() {
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self.push(value).unwrap_or(())
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}
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}
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}
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impl Context {
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fn new() -> Context {
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Context {
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data: json::JsonValue::new_object(),
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questions: json::JsonValue::new_array(),
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cur_keyword_type: None,
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cur_question: json::JsonValue::new_object(),
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cur_question_pre: json::JsonValue::new_object(),
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cur_tag: String::new(),
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cur_content: Vec::<String>::new(),
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cur_scope: DataScope::Global,
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have_new_question: false,
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last_keyword_type: None,
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last_tag: String::new(),
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}
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}
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}
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impl FromStr for KeywordType {
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type Err = ();
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fn from_str(pattern: &str) -> Result<Self, Self::Err> {
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use KeywordType::*;
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Ok(match pattern {
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"Мета:" => Ignore,
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"Чемпионат:" | "Пакет:" => Global,
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"Тур:" => QuestionPre,
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"Вопрос " | "Вопрос:" => QuestionStart,
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"Ответ:" | "Зачет:" => QuestionContent,
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_ => CurrentScope,
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// "URL:" | "Ссылка:" | "Дата:" | "Обработан:" | "Автор:" | "Редактор:" | "Копирайт:" | "Инфо:" |
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// "Тема:" | "Вид:" | "Тип:" | "Источник:" | "Рейтинг:" | "Комментарий:" | "Комментарии:"
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})
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}
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}
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async fn parse_file(
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entry_reader: impl AsyncReadExt + Unpin,
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) -> Result<json::JsonValue, Box<dyn std::error::Error>> {
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let buf_reader = BufReader::new(entry_reader);
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let mut lines = buf_reader.lines();
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let patterns = vec![
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"Чемпионат:",
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"Пакет:",
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"URL:",
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"Ссылка:",
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"Дата:",
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"Редактор:",
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"Обработан:",
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"Копирайт:",
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"Инфо:",
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"Тема:",
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"Вид:",
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"Тип:",
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"Тур:",
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"Мета:",
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"Вопрос ",
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"Вопрос:",
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"Ответ:",
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"Зачет:",
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"Источник:",
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"Рейтинг:",
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"Автор:",
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"Комментарий:",
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"Комментарии:",
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];
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let mut context = Context::new();
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let mut ctx = &mut context;
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while let Some(line_r) = lines.next_line().await? {
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let line = line_r.trim();
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if line.is_empty() {
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continue;
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}
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let line = line.to_string();
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match patterns
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.iter() // find keyword
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.find(|&&pattern| line.starts_with(pattern) && line.ends_with(':'))
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{
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Some(pattern) => {
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use KeywordType::*;
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ctx.last_keyword_type = ctx.cur_keyword_type;
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ctx.last_tag = ctx.cur_tag.clone();
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ctx.cur_keyword_type = Some(pattern.parse().unwrap());
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ctx.cur_tag = pattern.replace(' ', "").replace(':', "");
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// remember question id
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if let Some(QuestionStart) = ctx.cur_keyword_type {
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ctx.cur_question_pre["id"] = line.replace(':', "").as_str().into();
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};
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// apply accumulated content when new keyword found
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match ctx.last_keyword_type {
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Some(Global) => {
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ctx.cur_scope = DataScope::Global;
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ctx.data[&ctx.last_tag] = ctx.cur_content.join("\n").into()
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}
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Some(QuestionPre) => {
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ctx.cur_scope = DataScope::QuestionPre;
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ctx.cur_question_pre[&ctx.last_tag] = ctx.cur_content.join("\n").into();
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}
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Some(QuestionStart) => {
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ctx.cur_scope = DataScope::QuestionContent;
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// store prev question before reading new
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if ctx.have_new_question {
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ctx.questions.push_if_valid(ctx.cur_question.clone());
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}
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// prepare to read new question data with cur_question_pre values
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ctx.cur_question = ctx.cur_question_pre.clone();
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ctx.cur_question[&ctx.last_tag] = ctx.cur_content.join("\n").into();
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ctx.have_new_question = true;
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}
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Some(QuestionContent) => {
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ctx.cur_question[&ctx.last_tag] = ctx.cur_content.join("\n").into();
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}
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Some(CurrentScope) => {
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// match value to store data
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let scope_data = match ctx.cur_scope {
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DataScope::Global => &mut ctx.data,
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DataScope::QuestionPre => &mut ctx.cur_question_pre,
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DataScope::QuestionContent => &mut ctx.cur_question,
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};
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scope_data[&ctx.last_tag] = ctx.cur_content.join("\n").into();
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}
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_ => (), //None or Ignore
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};
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// clear content
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ctx.cur_content.clear();
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}
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None => {
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// accumulate content if line is not a keyword
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ctx.cur_content.push(line);
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}
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}
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}
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// finish reading last question
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if ctx.have_new_question && !ctx.cur_content.is_empty() {
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ctx.cur_question[&ctx.cur_tag] = ctx.cur_content.join("\n").into();
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ctx.questions.push_if_valid(ctx.cur_question.clone());
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ctx.have_new_question = false;
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}
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ctx.data["Вопросы"] = ctx.questions.clone();
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Ok(ctx.data.clone())
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}
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async fn process_file(
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archive: &ZipFileReader,
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index: usize,
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name: String,
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) -> Result<(), Box<dyn std::error::Error>> {
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let entry_reader = archive.entry_reader(index).await?;
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// make output filename
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let mut outfilename = PathBuf::from(OUTPUT_PATH);
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outfilename.push(name);
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outfilename.set_extension("json");
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// save json to file
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let new_data = parse_file(entry_reader).await?;
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let data_str = task::spawn_blocking(move || {
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new_data.pretty(2)
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}).await?;
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let mut outfile = fs::File::create(outfilename).await?;
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outfile.write_all(data_str.as_bytes()).await?;
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Ok(())
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}
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#[tokio::main]
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async fn main() -> Result<(), Box<dyn std::error::Error>> {
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// open archive just to list files
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let archive = ZipFileReader::new(String::from(BASE_FILENAME)).await?;
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let source_files: Vec<(usize, String)> = archive
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.entries()
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.iter()
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.enumerate()
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.filter(|item| !item.1.dir())
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.filter(|item| {
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// skip files without "txt" extension
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item.1.name().ends_with(".txt")
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})
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.map(|item| (item.0, item.1.name().to_string()))
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.collect();
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// check output directory
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match fs::metadata(OUTPUT_PATH).await {
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Err(_) => fs::create_dir_all(OUTPUT_PATH).await?,
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Ok(x) if x.is_file() => return Err("output directory is file!".into()),
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_ => (),
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};
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println!("processing {} files ...", source_files.len());
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for i in source_files {
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process_file(&archive, i.0, i.1).await?;
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}
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println!("done");
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Ok(())
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}
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