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import java.util.ArrayList;
import java.util.HashMap;
/*
* @author
* Kian Agheli
*
* References:
*
* Date:
* 2024-05-08
*
* Purpose of class:
* Store and operate on font family metadata.
*/
public class FontFamily {
/* JSONReader from which metadata is pulled. */
private JSONReader metadata;
/* Taken from first line of METADATA.pb */
private String familyName;
/* Taken from fonts/tags/all/families.csv */
private HashMap<String,Integer> styles;
/* Taken from top level of METADATA.pb */
private String dateAdded;
/* Unicode ranges. */
private String[] subsets;
private String designer;
/* total views, 7day views, 30day views, 90day views, year views.
Taken from popularity.json. */
final String[] popularityMetrics = {"7day", "30day", "90day", "year"};
private HashMap<String,Long> views;
private String license; // Distribution license.
private String category; // Vague category.
/* popularity.json and families.csv are shared among all families.
Have their associated objects passed from outside. */
/**
* Constructor.
*/
public FontFamily(JSONReader metadata, JSONReader popularity, CSVReader styles) {
this.metadata = metadata; // Set the instance's metadata to passed value. */
parseMetadata(metadata); // Parse the metadata.
views = new HashMap<String,Long>(); // Instantiate views hash map.
parsePopularity(popularity); // Parse the popularity data
this.styles = new HashMap<String,Integer>(); // Instantiate styles hash map
parseStyles(styles); // Parse the styles data
}
/**
* Parse metadata.
*/
private void parseMetadata(JSONReader metadata) {
/* Parse the given fields. See their values described near the top of the class definition. */
familyName = metadata.get("name");
dateAdded = metadata.get("date_added");
subsets = metadata.getAll("subsets");
designer = metadata.get("designer");
license = metadata.get("license");
category = metadata.get("category");
}
/**
* Parse popularity.
*/
private void parsePopularity(JSONReader popularity) {
String popularityJson = popularity.getFamily(familyName); // Block of JSON for this family
if (popularityJson == null) {
/* Not all families have popularity metadata, just most. */
return;
}
/* For each timeframe provided in popularity.json, parse as long and add to hash map. */
for (String timeframe : popularityMetrics) {
String timeframeKey = "\"" + timeframe + "\":"; // JSON key
int timeframeIndex = popularityJson.indexOf(timeframeKey); // Index of JSON key
String viewsKey = "\"views\": "; // JSON key for views following timeframe key
int viewsIndex = popularityJson.indexOf(viewsKey, timeframeIndex);
int start = viewsIndex + viewsKey.length(); // Start of data after key
int end = popularityJson.indexOf(",", start); // End of data before next comma
long value = 0;
/* Parse views as long. */
try {
value = Long.parseLong(popularityJson.substring(start, end));
/* If fail to parse as long, something is wrong with popularity.json.
2^63 is a big number to overflow. */
} catch (NumberFormatException e) {
System.out.println("Failed to parse " + e.getMessage());
System.exit(-1);
}
views.put(timeframe, value); // Add the parsed long to the hash map
}
/* Parse total views for given family. */
try {
views.put("total", Long.parseLong(JSONReader.get(popularityJson, "totalViews")));
/* If fail to parse as long, something is wrong with popularity.json.
2^63 is a big number to overflow. */
} catch (NumberFormatException e) {
System.out.println("Failed to parse " + e.getMessage());
System.exit(-1);
}
}
/**
* Parse styles.
*/
private void parseStyles(CSVReader styleCsv) {
int len = styleCsv.getLength(); // Lines of body in CSV
/* Styles CSV has three header fields: Family, Group/Tag, and Weight. */
for (int i = 0; i < len; i++) {
/* If the current row contains data for the given family, add that data. */
if (familyName.equals(styleCsv.get(i, "Family"))) {
try {
/* Add the Group/Tag and the associated weight. */
styles.put(styleCsv.get(i, "Group/Tag"),
Integer.parseInt(styleCsv.get(i, "Weight")));
/* If unable to parse as integer, something is wrong with families.csv. */
} catch (NumberFormatException e) {
System.out.println("Unable to parse " + e.getMessage());
System.exit(-1);
}
}
}
}
/**
* @return family name
*/
public String getFamilyName() {
return familyName;
}
/**
* @return unicode subsets.
*/
public String[] getSubsets() {
return subsets;
}
/**
* @return views hash map
*/
public HashMap<String,Long> getViews() {
return views;
}
}
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