Add data buffering

.gitignore

@@ -1,10 +1,15 @@
+#LaTeX output files
 main.out
 main.log
 main.aux
 main.synctex.gz
 main.toc
 
+#Data to be reprocessed
 data/testing/
 data/pages/
 data/tables/
+data/jisho
+
+#Libraries
 jishoScrape/node_modules

Makefile

@@ -24,6 +24,7 @@ folders:
 	mkdir data/pages
 	mkdir data/tables
 	mkdir data/testing
+	mkdir data/jisho
 	cd jishoScrape
 	npm install
 	cd ..

jishoScrape/index.js

@@ -1,7 +1,7 @@
 const fs = require('fs');
 
 /* Import local files */
-const {fetchKanjiFromTxt, fetchKanjiFromJisho} = require('./src/dataFetching.js');
+const {fetchKanjiFromTxt, fetchJishoBufferData, fetchKanjiFromJisho} = require('./src/dataFetching.js');
 const {getKanjiTexData} = require('./src/texConversion.js');
 const {kanjiTable} = require('./src/kanjiTables.js');
 
@@ -10,11 +10,24 @@ async function main(jlptLevel) {
 
   const jlptLevelCaps = jlptLevel.toUpperCase();
 
-  const kanjiArray = await fetchKanjiFromTxt(`./data/txt/${jlptLevel}.txt`);
-  console.log(`${jlptLevelCaps}: Fetched txt`);
+  /* Fetch data from buffer if available.
+  *  Else fetch data from txt and jisho requests,
+  *  and make buffer files
+  */
+  if(fs.existsSync(`./data/jisho/${jlptLevel}.json`)) {
+    var jishoResults = await fetchJishoBufferData(`./data/jisho/${jlptLevel}.json`);
+    console.log(`${jlptLevelCaps}: Fetched Jisho data from buffer`);
 
-  const jishoResults = await fetchKanjiFromJisho(kanjiArray);
-  console.log(`${jlptLevelCaps}: Fetched Jisho data`);
+  } else {
+    const kanjiArray = await fetchKanjiFromTxt(`./data/txt/${jlptLevel}.txt`);
+    console.log(`${jlptLevelCaps}: Fetched txt`);
+  
+    var jishoResults = await fetchKanjiFromJisho(kanjiArray);
+    console.log(`${jlptLevelCaps}: Fetched Jisho data`);
+
+    fs.writeFile(`./data/jisho/${jlptLevel}.json`, JSON.stringify(jishoResults, null, " "), (err) => {if (err) console.error(err)});
+    console.log(`${jlptLevelCaps}: Written Jisho data to buffer`);
+  }
 
   const sortedKanjiArray = jishoResults.map(result => result.query);
   const texData = getKanjiTexData(jishoResults);

jishoScrape/src/dataFetching.js

@@ -6,7 +6,7 @@ const jisho = new jishoApi();
 /**
  * Reads a txt file and splits the characters into an array
  * @param {string} file Path to file
- * @returns {string[]} Kanji
+ * @returns {string[]} A list of Kanji
  */
 async function fetchKanjiFromTxt(file) {
   const read = util.promisify(fs.readFile);
@@ -14,10 +14,21 @@ async function fetchKanjiFromTxt(file) {
   return data.split('');
 }
 
+/**
+ * Reads a json file and returns the data as an object
+ * @param {string} file Path to file
+ * @returns {object} Jisho results
+ */
+async function fetchJishoBufferData(file) {
+  const read = util.promisify(fs.readFile);
+  const data = await read(file, 'utf8');
+  return JSON.parse(data);
+}
+
 /**
  * Makes a delayed kanji search request in order not to overload the server.
- * @param {string} kanji The character to search for
- * @param {number} delay Number of milliseconds delay to the request
+ * @param {string} kanji A character to search for
+ * @param {number} delay A number of milliseconds delay to the request
  * @return {promise} A promise that's going to run a request after the specified delay
  */
 async function delayedJishoCall(kanji, delay) {
@@ -43,4 +54,5 @@ async function fetchKanjiFromJisho(kanjiArray) {
 }
 
 exports.fetchKanjiFromTxt = fetchKanjiFromTxt;
+exports.fetchJishoBufferData = fetchJishoBufferData;
 exports.fetchKanjiFromJisho = fetchKanjiFromJisho;