Add complete Kobo highlight sync system with NickelMenu integration
- Add text cleaning to remove page reference numbers (e.g., "10After" -> "After") - Implement cleanHighlightText() function with boundary detection - Add NickelMenu configuration for UI integration - Create sync wrapper scripts (with and without FBInk notifications) - Add installation guides for Kobo deployment - Include pointer/slice explanation examples for learning Features: - Extracts highlights from Kobo SQLite database - Cleans page references from academic texts - Computes SHA-256 hashes for deduplication - POSTs JSON to Flask API endpoint - Supports ARM static linking for Kobo hardware - Optional FBInk notifications for user feedback 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
Claude
+169
-25
@@ -3,6 +3,61 @@ const c = @cImport({
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@cInclude("sqlite3.h");
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});
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// Helper function to clean highlight text by removing page/margin reference numbers
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// Removes patterns like "10After" -> "After" and " 5good" -> " good"
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fn cleanHighlightText(allocator: std.mem.Allocator, text: []const u8) ![]const u8 {
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var result = std.ArrayList(u8).initCapacity(allocator, 0) catch unreachable;
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defer result.deinit(allocator);
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const writer = result.writer(allocator);
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var i: usize = 0;
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while (i < text.len) {
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// Check if we're at start of text or after whitespace/newline
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const at_boundary = (i == 0) or (text[i - 1] == ' ') or (text[i - 1] == '\n') or (text[i - 1] == '\t');
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if (at_boundary and std.ascii.isDigit(text[i])) {
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// Count consecutive digits
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var digit_end = i;
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while (digit_end < text.len and std.ascii.isDigit(text[digit_end])) {
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digit_end += 1;
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}
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// If digits are followed by a letter (like "10After"), skip the digits
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if (digit_end < text.len and std.ascii.isAlphabetic(text[digit_end])) {
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i = digit_end; // Skip the digits
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continue;
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}
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}
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try writer.writeByte(text[i]);
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i += 1;
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}
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return try allocator.dupe(u8, result.items);
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}
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// Helper function to escape JSON strings
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fn escapeJson(allocator: std.mem.Allocator, s: []const u8) ![]const u8 {
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var result = std.ArrayList(u8).initCapacity(allocator, 0) catch unreachable;
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defer result.deinit(allocator);
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const writer = result.writer(allocator);
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try writer.writeAll("\"");
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for (s) |ch| {
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switch (ch) {
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'"' => try writer.writeAll("\\\""),
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'\\' => try writer.writeAll("\\\\"),
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'\n' => try writer.writeAll("\\n"),
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'\r' => try writer.writeAll("\\r"),
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'\t' => try writer.writeAll("\\t"),
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else => try writer.writeByte(ch),
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}
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}
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try writer.writeAll("\"");
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return try allocator.dupe(u8, result.items);
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}
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const Highlight = struct {
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text: []const u8, // Owned copy
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date: []const u8, // Owned copy
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@@ -11,9 +66,32 @@ const Highlight = struct {
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book_hash: [64]u8, // Stack allocated - no cleanup needed
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allocator: std.mem.Allocator,
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// JSON-serializable version (no allocator field)
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const JsonHighlight = struct {
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text: []const u8,
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date: []const u8,
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book: []const u8,
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text_hash: []const u8, // Slice view of the hash array
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book_hash: []const u8, // Slice view of the hash array
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};
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fn toJson(self: *const Highlight) JsonHighlight {
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return JsonHighlight{
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.text = self.text,
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.date = self.date,
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.book = self.book,
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.text_hash = &self.text_hash,
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.book_hash = &self.book_hash,
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};
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}
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fn init(allocator: std.mem.Allocator, text: []const u8, date: []const u8, book: []const u8, content_id_raw: []const u8) !Highlight {
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// Clean the text to remove page reference numbers
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const cleaned_text = try cleanHighlightText(allocator, text);
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defer allocator.free(cleaned_text);
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var highlight = Highlight{
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.text = try allocator.dupe(u8, text), // Copy from SQLite buffer
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.text = try allocator.dupe(u8, cleaned_text), // Copy cleaned text
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.date = try allocator.dupe(u8, date), // Copy from SQLite buffer
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.book = try allocator.dupe(u8, book), // Copy from SQLite buffer
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.text_hash = undefined,
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@@ -21,8 +99,8 @@ const Highlight = struct {
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.allocator = allocator,
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};
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// Now compute hashes into the struct fields
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computeHash(text, &highlight.text_hash);
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// Now compute hashes into the struct fields (use cleaned text for hash)
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computeHash(cleaned_text, &highlight.text_hash);
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computeHash(content_id_raw, &highlight.book_hash);
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return highlight;
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@@ -39,7 +117,11 @@ const Highlight = struct {
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std.crypto.hash.sha2.Sha256.hash(data, &hash, .{});
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// Convert 32 bytes to 64 hex characters
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_ = std.fmt.bufPrint(out_hex, "{s}", .{std.fmt.fmtSliceHexLower(&hash)}) catch unreachable;
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const hex_chars = "0123456789abcdef";
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for (hash, 0..) |byte, i| {
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out_hex[i * 2] = hex_chars[byte >> 4];
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out_hex[i * 2 + 1] = hex_chars[byte & 0x0F];
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}
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}
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};
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@@ -53,12 +135,14 @@ pub fn main() !void {
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defer std.process.argsFree(allocator, args);
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if (args.len < 2) {
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std.debug.print("Usage: {s} <path-to-kobo-database.sqlite>\n", .{args[0]});
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std.debug.print("Usage: {s} <path-to-kobo-database.sqlite> [flask-endpoint-url]\n", .{args[0]});
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std.debug.print("Example: {s} /mnt/kobo/.kobo/KoboReader.sqlite\n", .{args[0]});
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std.debug.print("Example: {s} /mnt/kobo/.kobo/KoboReader.sqlite https://myserver.com/api/highlights\n", .{args[0]});
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return error.MissingArgument;
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}
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const db_path = args[1];
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const endpoint_url = if (args.len >= 3) args[2] else null;
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// Open database
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var db: ?*c.sqlite3 = null;
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@@ -77,7 +161,8 @@ pub fn main() !void {
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\\ SUBSTR(
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\\ SUBSTR(ContentID, 40, INSTR(ContentID, '.epub') - 40 + 5),
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\\ INSTR(SUBSTR(ContentID, 40, INSTR(ContentID, '.epub') - 40 + 5), '/') + 1
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\\ ) AS Book
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\\ ) AS Book,
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\\ ContentID
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\\FROM Bookmark
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\\WHERE Text IS NOT NULL
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\\ORDER BY DateCreated DESC;
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@@ -90,46 +175,105 @@ pub fn main() !void {
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}
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defer _ = c.sqlite3_finalize(stmt);
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// Set up buffered stdout writer
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const stdout_file = std.fs.File{ .handle = std.posix.STDOUT_FILENO };
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var stdout_buffer: [4096]u8 = undefined;
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var stdout_writer = stdout_file.writer(&stdout_buffer);
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const stdout = &stdout_writer.interface;
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var count: usize = 0;
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// Create ArrayList to collect highlights
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var highlights = std.ArrayList(Highlight).initCapacity(allocator, 0) catch unreachable;
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defer {
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for (highlights.items) |*highlight| {
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highlight.deinit();
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}
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highlights.deinit(allocator);
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}
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// Execute query and print results
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// Execute query and collect results
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while (c.sqlite3_step(stmt) == c.SQLITE_ROW) {
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count += 1;
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// Get the text (highlight)
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// Get the text (highlight) - convert C pointer to Zig slice
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const text_ptr = c.sqlite3_column_text(stmt, 0);
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const text = if (text_ptr != null)
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std.mem.span(@as([*:0]const u8, @ptrCast(text_ptr)))
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else
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"";
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// Get date
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// Get date - convert C pointer to Zig slice
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const date_ptr = c.sqlite3_column_text(stmt, 1);
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const date = if (date_ptr != null)
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std.mem.span(@as([*:0]const u8, @ptrCast(date_ptr)))
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else
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"unknown";
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// Get book title
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// Get book title - convert C pointer to Zig slice
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const book_ptr = c.sqlite3_column_text(stmt, 2);
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const book = if (book_ptr != null)
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std.mem.span(@as([*:0]const u8, @ptrCast(book_ptr)))
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else
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"unknown";
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// Print formatted output
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try stdout.print("\n========== Highlight #{d} ==========\n", .{count});
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try stdout.print("Date: {s}\n", .{date});
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try stdout.print("Book: {s}\n", .{book});
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try stdout.print("\n{s}\n", .{text});
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try stdout.print("===================================\n", .{});
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// Get raw ContentID for hash - convert C pointer to Zig slice
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const content_id_ptr = c.sqlite3_column_text(stmt, 3);
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const content_id = if (content_id_ptr != null)
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std.mem.span(@as([*:0]const u8, @ptrCast(content_id_ptr)))
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else
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"";
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// Create Highlight struct (makes owned copies and computes hashes)
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const highlight = try Highlight.init(allocator, text, date, book, content_id);
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// Add to ArrayList
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try highlights.append(allocator, highlight);
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}
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try stdout.print("\nTotal highlights extracted: {d}\n", .{count});
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try stdout_writer.interface.flush();
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std.debug.print("Extracted {d} highlights from database\n", .{highlights.items.len});
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// Build JSON manually
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var json_buffer = std.ArrayList(u8).initCapacity(allocator, 0) catch unreachable;
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defer json_buffer.deinit(allocator);
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const writer = json_buffer.writer(allocator);
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try writer.writeAll("[");
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for (highlights.items, 0..) |*highlight, i| {
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if (i > 0) try writer.writeAll(",");
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try writer.writeAll("{");
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const escaped_text = try escapeJson(allocator, highlight.text);
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defer allocator.free(escaped_text);
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const escaped_book = try escapeJson(allocator, highlight.book);
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defer allocator.free(escaped_book);
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try writer.print("\"text\":{s},", .{escaped_text});
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try writer.print("\"date\":\"{s}\",", .{highlight.date});
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try writer.print("\"book\":{s},", .{escaped_book});
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try writer.print("\"text_hash\":\"{s}\",", .{highlight.text_hash});
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try writer.print("\"book_hash\":\"{s}\"", .{highlight.book_hash});
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try writer.writeAll("}");
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}
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try writer.writeAll("]");
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// If endpoint URL provided, POST the JSON; otherwise just print it
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if (endpoint_url) |url| {
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std.debug.print("Sending {d} highlights ({d} bytes) to {s}...\n", .{highlights.items.len, json_buffer.items.len, url});
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var client: std.http.Client = .{ .allocator = allocator };
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defer client.deinit();
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const uri = try std.Uri.parse(url);
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const result = try client.fetch(.{
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.location = .{ .uri = uri },
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.method = .POST,
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.payload = json_buffer.items,
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.headers = .{
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.content_type = .{ .override = "application/json" },
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},
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});
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const status_code = @intFromEnum(result.status);
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if (status_code >= 200 and status_code < 300) {
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std.debug.print("✓ Successfully sent highlights to server (HTTP {})\n", .{status_code});
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} else {
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std.debug.print("✗ Server returned error: HTTP {}\n", .{status_code});
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return error.HttpRequestFailed;
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}
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} else {
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std.debug.print("No endpoint provided. JSON payload ({d} bytes):\n{s}\n", .{json_buffer.items.len, json_buffer.items});
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}
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}
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