Rename ESVAPI_BIBLE_BOOKS to BIBLE_BOOKS and make it use spaces for book names, instead of underscores.

esv.d

@@ -34,7 +34,7 @@ import std.utf       : toUTF8;
 import std.net.curl;
 
 const enum ESVAPI_URL = "https://api.esv.org/v3/passage";
-const string[] ESVAPI_BIBLE_BOOKS = [
+const string[] BIBLE_BOOKS = [
 	// Old Testament
 	"Genesis",
 	"Exodus",
@@ -44,12 +44,12 @@ const string[] ESVAPI_BIBLE_BOOKS = [
 	"Joshua",
 	"Judges",
 	"Ruth",
-	"1_Samuel",
-	"2_Samuel",
-	"1_Kings",
-	"2_Kings",
-	"1_Chronicles",
-	"2_Chronicles",
+	"1 Samuel",
+	"2 Samuel",
+	"1 Kings",
+	"2 Kings",
+	"1 Chronicles",
+	"2 Chronicles",
 	"Ezra",
 	"Nehemiah",
 	"Esther",
@@ -58,7 +58,7 @@ const string[] ESVAPI_BIBLE_BOOKS = [
 	"Psalms", // <- both are valid
 	"Proverbs",
 	"Ecclesiastes",
-	"Song_of_Solomon",
+	"Song of Solomon",
 	"Isaiah",
 	"Jeremiah",
 	"Lamentations",
@@ -83,25 +83,25 @@ const string[] ESVAPI_BIBLE_BOOKS = [
 	"John",
 	"Acts",
 	"Romans",
-	"1_Corinthians",
-	"2_Corinthians",
+	"1 Corinthians",
+	"2 Corinthians",
 	"Galatians",
 	"Ephesians",
 	"Philippians",
 	"Colossians",
-	"1_Thessalonians",
-	"2_Thessalonians",
-	"1_Timothy",
-	"2_Timothy",
+	"1 Thessalonians",
+	"2 Thessalonians",
+	"1 Timothy",
+	"2 Timothy",
 	"Titus",
 	"Philemon",
 	"Hebrews",
 	"James",
-	"1_Peter",
-	"2_Peter",
-	"1_John",
-	"2_John",
-	"3_John",
+	"1 Peter",
+	"2 Peter",
+	"1 John",
+	"2 John",
+	"3 John",
 	"Jude",
 	"Revelation"
 ];
@@ -182,7 +182,7 @@ class EsvAPI
 	 */
 	final bool validateBook(in char[] book) const nothrow @safe
 	{
-		foreach (string b; ESVAPI_BIBLE_BOOKS)
+		foreach (string b; BIBLE_BOOKS)
 		{
 			if (book.capitalize() == b.capitalize())
 				return true;
@@ -228,7 +228,7 @@ class EsvAPI
 			throw new EsvException("Invalid verse format");
 
 		string apiURL = format!"%s/%s/?q=%s+%s%s%s"(_url, _mode,
-				book.capitalize().replaceAll(regex("_"), "+"), verse, assembleParameters(), extraParameters);
+				book.capitalize().replaceAll(regex(" "), "+"), verse, assembleParameters(), extraParameters);
 		auto request = HTTP(apiURL);
 		string response;
 		request.onProgress = onProgress;
@@ -257,7 +257,7 @@ class EsvAPI
 		if (!validateVerse(verse))
 			throw new EsvException("Invalid verse format");
 
-		string apiURL = format!"%s/audio/?q=%s+%s"(_url, book.capitalize().replaceAll(regex("_"), "+"), verse);
+		string apiURL = format!"%s/audio/?q=%s+%s"(_url, book.capitalize().replaceAll(regex(" "), "+"), verse);
 		auto request = HTTP(apiURL);
 		ubyte[] response;
 		request.onProgress = onProgress;

main.d

@@ -23,7 +23,7 @@ import std.file    : exists, write, FileException;
 import std.getopt  : getopt, GetOptException, config;
 import std.path    : baseName, expandTilde, isValidPath;
 import std.process : environment, executeShell;
-import std.regex   : regex, matchFirst, replaceFirst;
+import std.regex   : regex, matchFirst, replaceAll, replaceFirst;
 import std.stdio   : writef, writeln, writefln, stderr;
 import std.string  : splitLines;
 
@@ -165,7 +165,7 @@ key = " ~ DEFAULT_APIKEY ~ "
 
 	// Initialise API object and validate the book and verse
 	EsvAPI esv = new EsvAPI(apiKey);
-	if (!esv.validateBook(args[1]))
+	if (!esv.validateBook(args[1].extractBook()))
 		panic("book '" ~ args[1] ~ "' does not exist");
 	if (!esv.validateVerse(args[2]))
 		panic("invalid verse format '" ~ args[2] ~ "'");
@@ -209,9 +209,9 @@ key = " ~ DEFAULT_APIKEY ~ "
 		try {
 			esv.opts.boolOpts["include_" ~ key] =
 				returnValid("true", iniData["passage"].getKey(key)).catchConvException(
-					(ConvException ex, string str)
+					(in ConvException ex, in char[] str)
 					{
-						panic(configPath ~ ": value '" ~ str ~
+						panic(configPath ~ ": value '" ~ cast(string)str ~
 								"' is not convertible to a boolean value; must be either 'true' or 'false'");
 					}
 				);
@@ -234,7 +234,7 @@ key = " ~ DEFAULT_APIKEY ~ "
 	if (optNoPassageReferences) esv.opts.boolOpts["include_passage_references"] = false;
 	if (optLineLength != 0)     esv.opts.intOpts ["line_length"] = optLineLength;
 
-	string verses = esv.getVerses(args[1], args[2]);
+	string verses = esv.getVerses(args[1].extractBook(), args[2]);
 	int lines;
 	foreach (string line; verses.splitLines())
 		++lines;
@@ -253,9 +253,9 @@ key = " ~ DEFAULT_APIKEY ~ "
 		catch (ProcessException e) {
 			if (!e.msg.matchFirst(regex("^Executable file not found")).empty) {
 				panic(e.msg
-						.matchFirst(": (.+)$")[0]
-						.replaceFirst(regex("^: "), "")
-						~ ": command not found"
+					.matchFirst(": (.+)$")[0]
+					.replaceFirst(regex("^: "), "")
+					~ ": command not found"
 				);
 			}
 		}
@@ -265,12 +265,17 @@ key = " ~ DEFAULT_APIKEY ~ "
 	return 0;
 }
 
-string extractOpt(GetOptException e) @safe
+string extractOpt(in GetOptException e) @safe
 {
 	return e.msg.matchFirst("-.")[0];
 }
 
-bool catchConvException(string sb, void delegate(ConvException ex, string str) catchNet)
+string extractBook(in string book) @safe
+{
+	return book.replaceAll(regex("[-_]"), " ");
+}
+
+bool catchConvException(in char[] sb, void delegate(in ConvException ex, in char[] str) @system catchNet)
 {
 	try return sb.to!bool();
 	catch (ConvException e) {