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feat(ui): channel Add gets a Type picker (Public/Hashtag/Private)

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"+ Add channel" jumped straight into a generic Name+Secret form, so the
"hashtag channel" convention documented in docs/companion_protocol.md
(secret = first 16 bytes of sha256("#topic")) was only reachable by
already knowing to type a literal "#topic" into the passphrase field --
nothing in the UI surfaced it. The phone app instead shows an explicit
channel-type picker; this adds the same on-device.

"+ Add channel" now asks Public / Hashtag / Private first:
- Public commits immediately with the well-known default channel's name
  and secret (8b3387e9c5cdea6ac9e5edbaa115cd72, confirmed to match
  MyMesh.cpp's PUBLIC_GROUP_PSK and the docs' published key) -- useful
  to restore it if deleted.
- Hashtag shows a single Topic field; Save synthesizes name="#topic" and
  derives the secret via the existing SHA-256 passphrase path -- same
  underlying mechanism Private already had, just discoverable without
  knowing the "#" convention.
- Private is today's manual Name+Secret form, unchanged.

Editing an existing channel skips the picker (no ambiguity to resolve
there). Extracted hexToSecret() out of deriveSecret()'s hex-mode branch
so Public's fixed key parses through the same code instead of a second
hand-rolled loop. No other file needed changes -- openAdd()/openEdit()/
active()/render()/handleInput() keep their existing signatures.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-07-17 22:04:40 +02:00
parent 94181831dd
commit 5908ba1256
3 changed files with 163 additions and 49 deletions
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22
docs/solo_features/message_screen/message_screen.md
View File

@@ -138,17 +138,23 @@ In the **Rooms** list the context menu instead offers:
### Adding / editing a channel
Joining a new community channel, or creating one to share with others, no longer needs the phone app. The **Channels** list ends with a **"+ Add channel"** row — press **Enter** on it to open the form, or use **Edit** from the context menu above to change an existing channel's name or secret.
Joining a new community channel, or creating one to share with others, no longer needs the phone app. The **Channels** list ends with a **"+ Add channel"** row — press **Enter** on it to pick a channel type, or use **Edit** from the context menu above to change an existing channel's name or secret (Edit skips the type picker and opens the Name/Secret form directly).
| Field | Notes |
| ------ | ---------------------------------------------------------------------------------------------- |
| Name | Up to 31 characters |
| Secret | **LEFT/RIGHT** toggles between two entry modes; **Enter** opens the keyboard for whichever is selected |
**+ Add channel** first asks which type of channel to create — the same three types the phone app offers:
- **Passphrase** (default) — type any text; the device hashes it down to the channel's 16-byte secret. Easiest to agree on verbally, the same idea as a room password — two people who type the same passphrase end up on the same channel.
- **Hex key** — type the exact 32-hex-character secret (the format used by channel QR codes, see [QR Codes](../../qr_codes.md)), for joining a channel whose precise secret you were given rather than agreeing on a new passphrase. An all-zero secret (`00…0`) is rejected ("Invalid secret") — that value is reserved internally to mark an empty channel slot.
- **Public** — instantly re-adds the well-known default public channel (no fields to fill in). Useful if it was deleted and you want it back without remembering its key.
- **Hashtag** — type a topic name (e.g. `test`); the channel's name and secret are both derived from it (name becomes `#test`, secret is the first 16 bytes of `sha256("#test")`). A topic-based public group chat — anyone who types the same topic elsewhere ends up on the same channel — separate from the default Public channel.
- **Private** — the manual Name + Secret form:
Select **[Save]** to commit. The secret can't be redisplayed once saved (only the derived key is kept) — editing it later means typing a new passphrase or hex key, the same as re-logging into a room with a new password.
| Field | Notes |
| ------ | ---------------------------------------------------------------------------------------------- |
| Name | Up to 31 characters |
| Secret | **LEFT/RIGHT** toggles between two entry modes; **Enter** opens the keyboard for whichever is selected |
- **Passphrase** (default) — type any text; the device hashes it down to the channel's 16-byte secret. Easiest to agree on verbally, the same idea as a room password — two people who type the same passphrase end up on the same channel.
- **Hex key** — type the exact 32-hex-character secret (the format used by channel QR codes, see [QR Codes](../../qr_codes.md)), for joining a channel whose precise secret you were given rather than agreeing on a new passphrase. An all-zero secret (`00…0`) is rejected ("Invalid secret") — that value is reserved internally to mark an empty channel slot.
Select **[Save]** to commit. The secret can't be redisplayed once saved (only the derived key is kept) — editing it later means typing a new passphrase or hex key, the same as re-logging into a room with a new password.
---

188
examples/companion_radio/ui-new/ChannelsView.h
View File

@@ -3,7 +3,22 @@
// Owned by MessagesScreen, which delegates render()/handleInput() to it while
// active() — the same relationship WaypointsView has with TrailScreen.
//
// The Secret field toggles between two entry modes with LEFT/RIGHT:
// "+ Add channel" starts with a Type picker (Public/Hashtag/Private), matching
// the phone app's channel-type trichotomy (docs/companion_protocol.md's
// "Channel Types") instead of exposing the raw Name+Secret form directly:
// - Public: one tap re-adds the well-known default channel (same secret
// MyMesh.cpp pre-configures at first boot) — no fields to fill in.
// - Hashtag: type just a topic name; the channel name and secret are both
// derived from it ("#topic", secret = first 16 bytes of sha256("#topic")).
// A topic-based public group chat, discoverable without knowing the hash
// convention exists.
// - Private: today's manual Name + Secret form (see below) — a channel only
// those you share the secret with can join.
// Editing an existing channel (openEdit()) skips the Type picker and goes
// straight to the Name+Secret form — there's no ambiguity to resolve there.
//
// The Secret field (Private, and internally for Public/Hashtag) toggles
// between two entry modes with LEFT/RIGHT:
// - Passphrase (default): any text, SHA-256'd down to 16 bytes — the same
// primitive BaseChatMesh::addChannel()/setChannel() already use to derive
// a channel's routing hash, just applied here to a typed phrase instead of
@@ -19,17 +34,20 @@
class ChannelsView {
UITask* _task;
enum Mode : uint8_t { OFF, ADD, EDIT };
enum Mode : uint8_t { OFF, TYPE_PICK, ADD, ADD_HASHTAG, EDIT };
uint8_t _mode = OFF;
int _idx = -1; // channel slot being added/edited
int _type_sel = 0; // TYPE_PICK cursor: 0=Public 1=Hashtag 2=Private
char _name[32] = "";
bool _hex_mode = false; // false = passphrase, true = 32-hex-char raw key
char _secret_text[33] = ""; // passphrase or hex string typed so far
char _topic[31] = ""; // ADD_HASHTAG: topic without the leading '#'
int _sel = 0; // 0=Name 1=Secret 2=[Save]
int _sel = 0; // 0=Name 1=Secret 2=[Save] (ADD_HASHTAG: 0=Topic 1=[Save])
bool _kb_active = false;
int _kb_field = -1; // 0=Name, 1=Secret
int _kb_field = -1; // 0=Name, 1=Secret, 2=Topic
KeyboardWidget& kb() { return _task->keyboard(); }
@@ -39,31 +57,36 @@ class ChannelsView {
_kb_active = true;
}
// Parses exactly 32 hex chars into a 16-byte secret (zero-padded to 32 for
// ChannelDetails.secret's full field width). Rejects malformed hex and the
// all-zero sentinel setChannelLocal() reads as "slot deleted" (see
// isAllZero() in MyMesh.cpp) -- saving one would pass, then immediately
// trigger onChannelRemoved() on this very slot, silently discarding the
// channel and its bot/notif/favourite state. Shared by deriveSecret()'s
// hex-mode branch and the Public quick-add (a fixed, known-good constant,
// but parsed through the same path rather than duplicated).
static bool hexToSecret(const char* hex32, uint8_t out[32]) {
if (strlen(hex32) != 32) return false;
uint8_t tmp[16];
for (int i = 0; i < 16; i++) {
char byte_str[3] = { hex32[i * 2], hex32[i * 2 + 1], 0 };
char* end = nullptr;
long v = strtol(byte_str, &end, 16);
if (*end != 0) return false;
tmp[i] = (uint8_t)v;
}
bool all_zero = true;
for (int i = 0; i < 16 && all_zero; i++) if (tmp[i]) all_zero = false;
if (all_zero) return false;
memset(out, 0, 32);
memcpy(out, tmp, 16);
return true;
}
// Turn the typed Secret field into a 16-byte channel secret. Returns false
// (and leaves out[] untouched) if the field can't be parsed as configured.
bool deriveSecret(uint8_t out[32]) const {
if (_hex_mode) {
if (strlen(_secret_text) != 32) return false;
uint8_t tmp[16];
for (int i = 0; i < 16; i++) {
char byte_str[3] = { _secret_text[i * 2], _secret_text[i * 2 + 1], 0 };
char* end = nullptr;
long v = strtol(byte_str, &end, 16);
if (*end != 0) return false;
tmp[i] = (uint8_t)v;
}
// An all-zero 16-byte secret is the sentinel setChannelLocal() reads as
// "slot deleted" (see isAllZero() in MyMesh.cpp) -- saving one here would
// pass, then immediately trigger onChannelRemoved() on this very slot,
// silently discarding the channel and its bot/notif/favourite state.
// Reject it up front rather than let that self-delete happen invisibly.
bool all_zero = true;
for (int i = 0; i < 16 && all_zero; i++) if (tmp[i]) all_zero = false;
if (all_zero) return false;
memset(out, 0, 32);
memcpy(out, tmp, 16);
return true;
}
if (_hex_mode) return hexToSecret(_secret_text, out);
if (_secret_text[0] == '\0') return false; // blank passphrase not allowed
uint8_t digest[32];
mesh::Utils::sha256(digest, sizeof(digest), (const uint8_t*)_secret_text, (int)strlen(_secret_text));
@@ -72,19 +95,48 @@ class ChannelsView {
return true;
}
bool saveChannel(const char* name, const uint8_t secret[32]) {
ChannelDetails ch;
memset(&ch, 0, sizeof(ch));
strncpy(ch.name, name, sizeof(ch.name) - 1);
memcpy(ch.channel.secret, secret, sizeof(ch.channel.secret));
return the_mesh.setChannelLocal((uint8_t)_idx, ch);
}
// Type picker's Public row: no fields to fill in, so this commits directly
// instead of dropping into the Name+Secret form -- the well-known channel's
// name and secret are both fixed. Hex confirmed via
// `python3 -c "import base64; print(base64.b64decode('izOH6cXN6mrJ5e26oRXNcg==').hex())"`
// to match MyMesh.cpp's PUBLIC_GROUP_PSK (base64) and
// docs/companion_protocol.md's documented public channel key (hex).
void commitPublic() {
static const char PUBLIC_SECRET_HEX[] = "8b3387e9c5cdea6ac9e5edbaa115cd72";
uint8_t secret[32];
hexToSecret(PUBLIC_SECRET_HEX, secret); // fixed, known-good constant -- can't fail
if (saveChannel("Public", secret)) _task->showAlert("Channel added", 1000);
else _task->showAlert("Save failed", 1200);
_mode = OFF;
}
void commit() {
if (_mode == ADD_HASHTAG) {
if (_topic[0] == '\0') { _task->showAlert("Topic required", 1200); return; }
// "#topic" as both the channel's display name and the passphrase fed to
// sha256 -- the exact "Hashtag Channels" convention in
// docs/companion_protocol.md, just synthesized instead of hand-typed.
snprintf(_name, sizeof(_name), "#%s", _topic);
strncpy(_secret_text, _name, sizeof(_secret_text) - 1);
_secret_text[sizeof(_secret_text) - 1] = '\0';
_hex_mode = false;
}
if (_name[0] == '\0') { _task->showAlert("Name required", 1200); return; }
uint8_t secret[32];
if (!deriveSecret(secret)) {
_task->showAlert(_hex_mode ? "Invalid secret" : "Secret required", 1400);
return;
}
ChannelDetails ch;
memset(&ch, 0, sizeof(ch));
strncpy(ch.name, _name, sizeof(ch.name) - 1);
memcpy(ch.channel.secret, secret, sizeof(ch.channel.secret));
if (the_mesh.setChannelLocal((uint8_t)_idx, ch)) {
_task->showAlert(_mode == ADD ? "Channel added" : "Channel updated", 1000);
if (saveChannel(_name, secret)) {
_task->showAlert((_mode == ADD || _mode == ADD_HASHTAG) ? "Channel added" : "Channel updated", 1000);
_mode = OFF;
} else {
_task->showAlert("Save failed", 1200);
@@ -95,14 +147,17 @@ public:
explicit ChannelsView(UITask* task) : _task(task) {}
bool active() const { return _mode != OFF || _kb_active; }
void reset() { _mode = OFF; _kb_active = false; _kb_field = -1; }
void reset() { _mode = OFF; _kb_active = false; _kb_field = -1; _type_sel = 0; _topic[0] = '\0'; }
// idx = the slot to write on Save (first free slot for Add, existing slot
// for Edit). Edit pre-fills Name; the Secret can't be redisplayed (only the
// derived key is stored), so editing it means typing a new passphrase/hex —
// same as re-logging into a room with a new password.
// for Edit). Starts at the Type picker (Public/Hashtag/Private) -- see
// handleInput()'s TYPE_PICK branch for what each option does next.
void openAdd(int idx) {
_mode = ADD; _idx = idx;
_mode = TYPE_PICK; _idx = idx; _type_sel = 0;
}
// Private option's form: today's manual Name + Secret entry, unchanged.
void openPrivate() {
_mode = ADD;
_name[0] = '\0'; _secret_text[0] = '\0'; _hex_mode = false; _sel = 0;
}
void openEdit(int idx, const char* existing_name) {
@@ -116,9 +171,37 @@ public:
display.setColor(DisplayDriver::LIGHT);
if (_kb_active) return kb().render(display);
display.drawCenteredHeader(_mode == ADD ? "ADD CHANNEL" : "EDIT CHANNEL");
const int top = display.listStart();
const int step = display.lineStep();
if (_mode == TYPE_PICK) {
display.drawCenteredHeader("ADD CHANNEL");
static const char* TYPE_LABELS[3] = { "Public", "Hashtag", "Private" };
for (int i = 0; i < 3; i++) {
int y = top + i * step;
display.drawSelectionRow(0, y - 1, display.width(), step - 1, i == _type_sel);
display.drawTextEllipsized(2, y, display.width() - 4, TYPE_LABELS[i]);
display.setColor(DisplayDriver::LIGHT);
}
return 1000;
}
if (_mode == ADD_HASHTAG) {
display.drawCenteredHeader("ADD CHANNEL");
for (int i = 0; i < 2; i++) {
int y = top + i * step;
bool sel = (i == _sel);
display.drawSelectionRow(0, y - 1, display.width(), step - 1, sel);
char row[40];
if (i == 0) snprintf(row, sizeof(row), "Topic: %s", _topic[0] ? _topic : "(none)");
else snprintf(row, sizeof(row), "[Save]");
display.drawTextEllipsized(2, y, display.width() - 4, row);
display.setColor(DisplayDriver::LIGHT);
}
return 1000;
}
display.drawCenteredHeader(_mode == ADD ? "ADD CHANNEL" : "EDIT CHANNEL");
for (int i = 0; i < 3; i++) {
int y = top + i * step;
bool sel = (i == _sel);
@@ -140,14 +223,39 @@ public:
if (_kb_active) {
auto r = kb().handleInput(c);
if (r == KeyboardWidget::DONE) {
if (_kb_field == 0) { strncpy(_name, kb().buf, sizeof(_name) - 1); _name[sizeof(_name) - 1] = '\0'; }
else { strncpy(_secret_text, kb().buf, sizeof(_secret_text) - 1); _secret_text[sizeof(_secret_text) - 1] = '\0'; }
if (_kb_field == 0) { strncpy(_name, kb().buf, sizeof(_name) - 1); _name[sizeof(_name) - 1] = '\0'; }
else if (_kb_field == 1) { strncpy(_secret_text, kb().buf, sizeof(_secret_text) - 1); _secret_text[sizeof(_secret_text) - 1] = '\0'; }
else { strncpy(_topic, kb().buf, sizeof(_topic) - 1); _topic[sizeof(_topic) - 1] = '\0'; }
_kb_active = false; _kb_field = -1;
} else if (r == KeyboardWidget::CANCELLED) {
_kb_active = false; _kb_field = -1;
}
return true;
}
if (_mode == TYPE_PICK) {
if (c == KEY_CANCEL) { _mode = OFF; return true; }
if (c == KEY_UP) { _type_sel = (_type_sel > 0) ? _type_sel - 1 : 2; return true; }
if (c == KEY_DOWN) { _type_sel = (_type_sel < 2) ? _type_sel + 1 : 0; return true; }
if (c == KEY_ENTER) {
if (_type_sel == 0) commitPublic();
else if (_type_sel == 1) { _mode = ADD_HASHTAG; _sel = 0; _topic[0] = '\0'; }
else openPrivate();
}
return true;
}
if (_mode == ADD_HASHTAG) {
if (c == KEY_CANCEL) { _mode = OFF; return true; }
if (c == KEY_UP) { _sel = (_sel > 0) ? _sel - 1 : 1; return true; }
if (c == KEY_DOWN) { _sel = (_sel < 1) ? _sel + 1 : 0; return true; }
if (c == KEY_ENTER) {
if (_sel == 0) { _kb_field = 2; openKb(_topic, sizeof(_topic) - 1); }
else commit();
}
return true;
}
if (c == KEY_CANCEL) { _mode = OFF; return true; }
if (c == KEY_UP) { _sel = (_sel > 0) ? _sel - 1 : 2; return true; }
if (c == KEY_DOWN) { _sel = (_sel < 2) ? _sel + 1 : 0; return true; }

2
release-notes.md
View File

@@ -3,7 +3,7 @@
### What's new
- **Nodes is now the single node hub.** "Nearby Nodes" is renamed **Nodes** and gains on-device contact management — no phone app needed: **Hold Enter** on a row opens **Add contact** (for a scanned-but-unknown node), **Favourite/Unfavourite** (pins to the first free Favourites Dial slot, shown as a star in the list), and **Delete contact** (confirm first, defaults to Cancel). The filter strip (**LEFT/RIGHT**) is now a visible, wraparound tab carousel instead of a hidden mode. The old read-only **Recent adverts** home page is retired — its passively-heard nodes now simply show up in the Nodes list (All filter) — so there's one list instead of two.
- **On-device channel management.** Messages › Channels gets a **"+ Add channel"** row and per-channel **Edit**/**Delete** — create or join a channel by typing either a passphrase (hashed to the channel secret, same idea as a room password) or the exact 32-hex-character key from a channel QR code. No phone app required.
- **On-device channel management.** Messages › Channels gets a **"+ Add channel"** row and per-channel **Edit**/**Delete** — no phone app required. Adding a channel now starts with a **type picker**, matching the phone app: **Public** (re-adds the well-known default channel, no typing needed), **Hashtag** (type just a topic name, e.g. `test` — the channel name and secret are both derived from it, same convention as the app's `#topic` channels), or **Private** (manual Name + Secret, typing either a passphrase hashed to the channel secret, or the exact 32-hex-character key from a channel QR code).
- **Tools › Admin — administer a remote repeater/room from the device.** Log into a node you have admin rights on (same self-healing saved-password handshake as room logins) and browse its settings in category tabs — **System** (name, owner info), **Radio** (Frequency/Bandwidth/Spreading factor/Coding rate/TX power), **Routing** (Repeat/Advert interval/Flood advert interval/Max hops), **Actions** (reboot, send advert, sync clock, …) — plus a free-text **Custom command…** escape hatch (with **{}**-key command-name completion) for anything not covered. Radio and Routing fields use a type-appropriate editor instead of raw text — a digit-cursor for Frequency (the same widget Settings' own Radio screen uses locally), discrete-set stepping for Bandwidth/Spreading factor/Coding rate, plain number steppers for the rest, and an ON/OFF toggle for Repeat — adjusting a value costs no mesh traffic until you actually confirm it with **Enter** (**Cancel** sends nothing). Reachable either from **Tools › Admin** (opens the same Nodes list to pick a target) or directly via a repeater/room's own **Hold Enter › Admin** action.
- **Auto-Reply Bot gains a third target: room servers**, alongside DM and Channel, with its own trigger/reply/commands — the screen is redesigned as a circular tab carousel (**Direct/Channel/Room/Other**, **LEFT/RIGHT** to switch, **UP/DOWN** within a tab) instead of one long list. Each target's **Enable** and **Commands** toggle is now fully independent (they used to secretly share the DM tab's setting for Channel/Room too). New `{name}`/`{hops}` reply placeholders, a DM allow-list (all chat contacts or favourites only), and a dedicated stepper for Quiet Hours.
- **Keyboard: accent popup, selectable main script, better editing.** Holding **Enter** on a Latin letter with accented variants (`a c d e i l n o r s t u y z`) now opens a one-row popup of that letter's accents — e.g. holding `a` offers `á à â ã ä å ą` — covering every European Latin-diacritic letter (Polish, Czech, Slovak, German, French, Spanish, Portuguese, Nordic, …) from one popup instead of a separate page per language. **Settings › Keyboard** splits **Alphabet** into **Main** and **Additional**: Main picks which script (Latin/Cyrillic/Greek) the keyboard opens on by default, Additional picks the second one reached via the **#@/abc** cycle key — so a Cyrillic or Greek typist can make their own script the default instead of always landing on Latin first. Shift is now **one-shot** by default (capitalises just the next letter; **Hold Enter** on Shift toggles the old sticky caps-lock back on), **Hold Enter** on Backspace clears the whole field, and **UP** from the top letter row enters a cursor-positioning mode (**LEFT/RIGHT** move; **UP/DOWN** jump to start/end, then continue on to the special row / letter grid if pressed again once already there) so you can edit or insert anywhere in what you've typed, not just at the end.