make url and invoice parsing case-insensitive

Signed-off-by: William Casarin <jb55@jb55.com>

damus-c/damus.c

@@ -79,19 +79,28 @@ static int parse_digit(struct cursor *cur, int *digit) {
 }
 
 static int parse_str(struct cursor *cur, const char *str) {
-    unsigned long len = strlen(str);
+    int i;
+    char c, cs;
+    unsigned long len;
+    
+    len = strlen(str);
     
     if (cur->p + len >= cur->end)
         return 0;
     
-    if (!memcmp(cur->p, str, len)) {
-        cur->p += len;
-        return 1;
-    }
+    for (i = 0; i < len; i++) {
+        c = tolower(cur->p[i]);
+        cs = tolower(str[i]);
         
+        if (c != cs)
             return 0;
     }
     
+    cur->p += len;
+    
+    return 1;
+}
+
 static int parse_mention(struct cursor *cur, struct block *block) {
     int d1, d2, d3, ind;
     const u8 *start = cur->p;
@@ -158,6 +167,9 @@ static int add_text_block(struct blocks *blocks, const u8 *start, const u8 *end)
 {
     struct block b;
     
+    if (start == end)
+        return 1;
+    
     b.type = BLOCK_TEXT;
     b.block.str.start = (const char*)start;
     b.block.str.end = (const char*)end;
@@ -171,7 +183,7 @@ static int parse_url(struct cursor *cur, struct block *block) {
     if (!parse_str(cur, "http"))
         return 0;
     
-    if (parse_char(cur, 's')) {
+    if (parse_char(cur, 's') || parse_char(cur, 'S')) {
         if (!parse_str(cur, "://")) {
             cur->p = start;
             return 0;
@@ -231,7 +243,7 @@ static int parse_invoice(struct cursor *cur, struct block *block) {
     return 1;
 }
 
-static int add_text_then_block(struct cursor *cur, struct blocks *blocks, struct block block, u8 **start, u8 *pre_mention)
+static int add_text_then_block(struct cursor *cur, struct blocks *blocks, struct block block, const u8 **start, const u8 *pre_mention)
 {
     if (!add_text_block(blocks, *start, pre_mention))
         return 0;
@@ -248,7 +260,7 @@ int damus_parse_content(struct blocks *blocks, const char *content) {
     int cp, c;
     struct cursor cur;
     struct block block;
-    u8 *start, *pre_mention;
+    const u8 *start, *pre_mention;
     
     blocks->num_blocks = 0;
     make_cursor(&cur, (const u8*)content, strlen(content));
@@ -264,11 +276,11 @@ int damus_parse_content(struct blocks *blocks, const char *content) {
                 if (!add_text_then_block(&cur, blocks, block, &start, pre_mention))
                     return 0;
                 continue;
-            } else if (c == 'h' && parse_url(&cur, &block)) {
+            } else if ((c == 'h' || c == 'H') && parse_url(&cur, &block)) {
                 if (!add_text_then_block(&cur, blocks, block, &start, pre_mention))
                     return 0;
                 continue;
-            } else if (c == 'l' && parse_invoice(&cur, &block)) {
+            } else if ((c == 'l' || c == 'L') && parse_invoice(&cur, &block)) {
                 if (!add_text_then_block(&cur, blocks, block, &start, pre_mention))
                     return 0;
                 continue;

damusTests/InvoiceTests.swift

@@ -18,15 +18,30 @@ final class InvoiceTests: XCTestCase {
         // Put teardown code here. This method is called after the invocation of each test method in the class.
     }
     
+    func testParseInvoiceUpper() throws {
+        let invstr = "LNBC100N1P357SL0SP5T9N56WDZTUN39LGDQLR30XQWKSG3K69Q4Q2RKR52APLUJW0ESN0QPP5MRQGLJK62Z20Q4NVGR6LZCYN6FHYLZCCWDVU4K77APG3ZMRKUJJQDPZW35XJUEQD9EJQCFQV3JHXCMJD9C8G6T0DCXQYJW5QCQPJRZJQT56H4GVP5YX36U2UZQA6QWCSK3E2DUUNFXPPZJ9VHYPC3WFE2WSWZ607UQQ3XQQQSQQQQQQQQQQQLQQYG9QYYSGQAGX5H20AEULJ3GDWX3KXS8U9F4MCAKDKWUAKASAMM9562FFYR9EN8YG20LG0YGNR9ZPWP68524KMDA0T5XP2WYTEX35PU8HAPYJAJXQPSQL29R"
+        let parsed = parse_mentions(content: invstr, tags: [])
+        
+        XCTAssertNotNil(parsed)
+        XCTAssertEqual(parsed.count, 1)
+        XCTAssertNotNil(parsed[0].is_invoice)
+        guard let invoice = parsed[0].is_invoice else {
+            return
+        }
+        XCTAssertEqual(invoice.amount, 10000)
+        XCTAssertEqual(invoice.expiry, 604800)
+        XCTAssertEqual(invoice.created_at, 1666139119)
+        XCTAssertEqual(invoice.string, invstr)
+    }
+    
     func testParseInvoice() throws {
         let invstr = "lnbc100n1p357sl0sp5t9n56wdztun39lgdqlr30xqwksg3k69q4q2rkr52aplujw0esn0qpp5mrqgljk62z20q4nvgr6lzcyn6fhylzccwdvu4k77apg3zmrkujjqdpzw35xjueqd9ejqcfqv3jhxcmjd9c8g6t0dcxqyjw5qcqpjrzjqt56h4gvp5yx36u2uzqa6qwcsk3e2duunfxppzj9vhypc3wfe2wswz607uqq3xqqqsqqqqqqqqqqqlqqyg9qyysgqagx5h20aeulj3gdwx3kxs8u9f4mcakdkwuakasamm9562ffyr9en8yg20lg0ygnr9zpwp68524kmda0t5xp2wytex35pu8hapyjajxqpsql29r"
         let parsed = parse_mentions(content: invstr, tags: [])
         
         XCTAssertNotNil(parsed)
-        XCTAssertEqual(parsed.count, 2)
-        XCTAssertEqual(parsed[0].is_text, "")
-        XCTAssertNotNil(parsed[1].is_invoice)
-        guard let invoice = parsed[1].is_invoice else {
+        XCTAssertEqual(parsed.count, 1)
+        XCTAssertNotNil(parsed[0].is_invoice)
+        guard let invoice = parsed[0].is_invoice else {
             return
         }
         XCTAssertEqual(invoice.amount, 10000)

damusTests/damusTests.swift

@@ -64,6 +64,14 @@ class damusTests: XCTestCase {
         XCTAssertNotNil(parsed[0].is_text)
     }
     
+    func testParseUrlUpper() {
+        let parsed = parse_mentions(content: "a HTTPS://jb55.COM b", tags: [])
+
+        XCTAssertNotNil(parsed)
+        XCTAssertEqual(parsed.count, 3)
+        XCTAssertEqual(parsed[1].is_url?.absoluteString, "HTTPS://jb55.COM")
+    }
+    
     func testParseUrl() {
         let parsed = parse_mentions(content: "a https://jb55.com b", tags: [])
 
@@ -85,10 +93,9 @@ class damusTests: XCTestCase {
         let parsed = parse_mentions(content: "https://jb55.com br", tags: [])
 
         XCTAssertNotNil(parsed)
-        XCTAssertEqual(parsed.count, 3)
-        XCTAssertEqual(parsed[0].is_text, "")
-        XCTAssertEqual(parsed[1].is_url?.absoluteString, "https://jb55.com")
-        XCTAssertEqual(parsed[2].is_text, " br")
+        XCTAssertEqual(parsed.count, 2)
+        XCTAssertEqual(parsed[0].is_url?.absoluteString, "https://jb55.com")
+        XCTAssertEqual(parsed[1].is_text, " br")
     }
     
     func testParseMentionBlank() {