feat(MessageComposer): introduce context for custom composers - #3249

#!/bin/bash
set -euo pipefail

echo "Locate MessageComposer files"
fd -a 'MessageComposer\.tsx$' . || true

echo
echo "Relevant snippet and nearby effect code"
if [ -f src/components/MessageComposer/MessageComposer.tsx ]; then
  wc -l src/components/MessageComposer/MessageComposer.tsx
  sed -n '1,170p' src/components/MessageComposer/MessageComposer.tsx | cat -n
fi

#!/bin/bash
set -euo pipefail

echo "Inspect controller draft/create/clear definitions"
rg -n "createDraft|clear\\(|drafts|state" src/components/MessageComposer -S
echo
echo "Inspect controller hooks"
fd -a 'Hooks?|Controller|.*Controller.*|.*Controller.*' src/components/MessageComposer | sed 's#^`#/`#' | head -50
echo
fd -a 'Hooks?|.*Controller.*' src/components/MessageComposer | while read -r f; do
  echo "--- $f"
  wc -l "$f"
  sed -n '1,260p' "$f" | cat -n
done

echo
echo "Check package React version type/imports are safe for useRef"
if [ -f package.json ]; then
  node -e "const p=require('./package.json'); console.log(JSON.stringify({react:p.dependencies?.react ?? p.devDependencies?.react}, null, 2))"
fi
rg "react|react-dom" package.json yarn.lock 2>/dev/null | head -40 || true

#!/bin/bash
set -euo pipefail

# Locate and inspect the target file and relevant inline edit implementation.
if [ -f "examples/vite/src/InlineEditMessage/InlineEditMessage.tsx" ]; then
  nl -ba examples/vite/src/InlineEditMessage/InlineEditMessage.tsx | sed -n '1,180p'
else
  echo "Target file not found"
  fd -i 'InlineEditMessage.tsx' .
fi

# Show how MessageComposerController/types and channel dependencies are used elsewhere, if available.
rg -n "MessageComposerController|compositionContext: channel|const editingComposer|useMemo|channel\\b" examples/vite/src || true

# Deterministic static check: parse the target JSX and report all useMemo/compose dependency expressions containing identifier `channel` in the target file.
python3 - <<'PY'
from pathlib import Path
p=Path('examples/vite/src/InlineEditMessage/InlineEditMessage.tsx')
if not p.exists():
    print("MISSING_PATH")
    raise SystemExit(0)
text=p.read_text()
# Simple brace-aware extraction around useMemo(...) calls for the exact controller construction area.
hits=[]
for i,line in enumerate(text.splitlines(),1):
    if 'new MessageComposerController({' in line or 'editingComposer' in line or "compositionContext: channel" in line:
        hits.append((i,line.strip()))
print("target_hits:")
for h in hits:
    print(f"{h[0]}:{h[1]}")

# Locate the useMemo dependency list for editingComposer by finding bracket balance from first useMemo opening paren until matching closed paren.
lines=text.splitlines()
start=None
for idx,line in enumerate(lines):
    if 'const editingComposer = useMemo' in line or 'useMemo(() => {' in line and 'compositionContext: channel' in '\n'.join(lines[idx:idx+10]):
        start=idx
        break
if start is None:
    print("NO_EDITING_COMPOSER_MEMO")
    raise SystemExit(0)
buf=[]
state=0
for idx,line in enumerate(lines[start:], start+1):
    for ch in line:
        if ch == '(':
            state += 1
            if state == 1:
                found=opening=(idx, line.find(ch)+1)
        if ch == ')':
            state -= 1
            if state == 0:
                end=(idx, line.find(ch)+1)
                break
    if state == 0 and opening:
        break
snippet='\n'.join(lines[opening[0]-1:end[0]-1])
print("editingComposer_memosnippet:")
print(snippet)
print("contains_identifier_channel:", ' channel' in snippet or ',channel' in snippet or '(channel' in snippet or '] [channel' in snippet or '] channel' in snippet)
PY

#!/bin/bash
set -euo pipefail

echo "Files:"
git ls-files | grep -F 'examples/vite/src/InlineEditMessage/InlineEditMessage.tsx' || true

echo
echo "Target file lines:"
awk '{printf "%6d\t%s\n", NR, $0}' examples/vite/src/InlineEditMessage/InlineEditMessage.tsx | sed -n '1,180p'

echo
echo "Relevant searches:"
rg -n "MessageComposerController|compositionContext: channel|const editingComposer|useMemo|channel\\b" examples/vite/src/InlineEditMessage/InlineEditMessage.tsx || true

echo
echo "Static dependency extraction:"
python3 - <<'PY'
from pathlib import Path
p=Path('examples/vite/src/InlineEditMessage/InlineEditMessage.tsx')
text=p.read_text()
lines=text.splitlines()
start=None
for idx,line in enumerate(lines):
    if 'const editingComposer = useMemo' in line:
        start=idx
        break
print("start=", start)
if start is None:
    raise SystemExit(0)
buf=[]
state=0
opening=None
for idx=line_idx in range(start, len(lines)):
    line=lines[idx]
    if opening is None and '(' in line:
        opening=(idx, line.find('(')+1)
        state += 1
        for ch in line[line.find('(')+1:]:
            if ch =='(': state +=1
            if ch ==')': state -=1
    elif opening is not None:
        for ch in line:
            if ch == '(': state += 1
            if ch == ')':
                state -= 1
                if state == 0:
                    end=(idx, line.find(ch)+1)
                    break
        if state == 0 and end:
            break
else:
    end=None

snippet='\n'.join(lines[opening[0]-1:end[0]-1])
print("snippet:")
print(snippet)
print("contains_identifier_channel:", ' channel' in snippet or ',channel' in snippet or '[channel' in snippet or '](channel' in snippet)
PY

#!/bin/bash
set -euo pipefail

echo "Current dependency array and context use:"
awk '{printf "%6d\t%s\n", NR, $0}' examples/vite/src/InlineEditMessage/InlineEditMessage.tsx | sed -n '112,129p'

echo
echo "Search for channel.*cid in examples:"
rg -n "channel\s*:|channel\.cid|useChannelStateContext|MessageComposerState|MessageComposerProvider" examples/vite/src -g '*.ts' -g '*.tsx' | sed -n '1,120p' || true