remove hooks package for now

repl/src/useRepl.mjs

@@ -0,0 +1,174 @@
+import { useCallback, useState, useMemo } from 'react';
+import { evaluate } from '@strudel/eval';
+import { getPlayableNoteValue } from '@strudel/core/util.mjs';
+import useCycle from './useCycle.mjs';
+import usePostMessage from './usePostMessage.mjs';
+
+let s4 = () => {
+  return Math.floor((1 + Math.random()) * 0x10000)
+    .toString(16)
+    .substring(1);
+};
+
+function useRepl({ tune, defaultSynth, autolink = true, onEvent, onDraw }) {
+  const id = useMemo(() => s4(), []);
+  const [code, setCode] = useState(tune);
+  const [activeCode, setActiveCode] = useState();
+  const [log, setLog] = useState('');
+  const [error, setError] = useState();
+  const [pending, setPending] = useState(false);
+  const [hash, setHash] = useState('');
+  const [pattern, setPattern] = useState();
+  const dirty = code !== activeCode || error;
+  const generateHash = () => encodeURIComponent(btoa(code));
+  const activateCode = async (_code = code) => {
+    if (activeCode && !dirty) {
+      setError(undefined);
+      cycle.start();
+      return;
+    }
+    try {
+      setPending(true);
+      const parsed = await evaluate(_code);
+      cycle.start();
+      broadcast({ type: 'start', from: id });
+      setPattern(() => parsed.pattern);
+      if (autolink) {
+        window.location.hash = '#' + encodeURIComponent(btoa(code));
+      }
+      setHash(generateHash());
+      setError(undefined);
+      setActiveCode(_code);
+      setPending(false);
+    } catch (err) {
+      err.message = 'evaluation error: ' + err.message;
+      console.warn(err);
+      setError(err);
+    }
+  };
+  const pushLog = (message) => setLog((log) => log + `${log ? '\n\n' : ''}${message}`);
+  // logs events of cycle
+  const logCycle = (_events, cycle) => {
+    if (_events.length) {
+      // pushLog(`# cycle ${cycle}\n` + _events.map((e: any) => e.show()).join('\n'));
+    }
+  };
+
+  // below block allows disabling the highlighting by including "strudel disable-highlighting" in the code (as comment)
+  onDraw = useMemo(() => {
+    if (activeCode && !activeCode.includes('strudel disable-highlighting')) {
+      return onDraw;
+    }
+  }, [activeCode]);
+
+  // cycle hook to control scheduling
+  const cycle = useCycle({
+    onDraw,
+    onEvent: useCallback(
+      (time, event) => {
+        try {
+          onEvent?.(event);
+          const { onTrigger, velocity } = event.context;
+          if (!onTrigger) {
+            if (defaultSynth) {
+              const note = getPlayableNoteValue(event);
+              defaultSynth.triggerAttackRelease(note, event.duration, time, velocity);
+            } else {
+              throw new Error('no defaultSynth passed to useRepl.');
+            }
+            /* console.warn('no instrument chosen', event);
+          throw new Error(`no instrument chosen for ${JSON.stringify(event)}`); */
+          } else {
+            onTrigger(time, event);
+          }
+        } catch (err) {
+          console.warn(err);
+          err.message = 'unplayable event: ' + err?.message;
+          pushLog(err.message); // not with setError, because then we would have to setError(undefined) on next playable event
+        }
+      },
+      [onEvent]
+    ),
+    onQuery: useCallback(
+      (state) => {
+        try {
+          return pattern?.query(state) || [];
+        } catch (err) {
+          console.warn(err);
+          err.message = 'query error: ' + err.message;
+          setError(err);
+          return [];
+        }
+      },
+      [pattern]
+    ),
+    onSchedule: useCallback((_events, cycle) => logCycle(_events, cycle), [pattern]),
+    ready: !!pattern && !!activeCode,
+  });
+
+  const broadcast = usePostMessage(({ data: { from, type } }) => {
+    if (type === 'start' && from !== id) {
+      // console.log('message', from, type);
+      cycle.setStarted(false);
+      setActiveCode(undefined);
+    }
+  });
+
+  // set active pattern on ctrl+enter
+  /* useLayoutEffect(() => {
+    // TODO: make sure this is only fired when editor has focus
+    const handleKeyPress = (e: any) => {
+      if (e.ctrlKey || e.altKey) {
+        switch (e.code) {
+          case 'Enter':
+            activateCode();
+            !cycle.started && cycle.start();
+            break;
+          case 'Period':
+            cycle.stop();
+        }
+      }
+    };
+    document.addEventListener('keypress', handleKeyPress);
+    return () => document.removeEventListener('keypress', handleKeyPress);
+  }, [pattern, code]); */
+
+  /* useWebMidi({
+    ready: useCallback(({ outputs }) => {
+      pushLog(`WebMidi ready! Just add .midi(${outputs.map((o) => `'${o.name}'`).join(' | ')}) to the pattern. `);
+    }, []),
+    connected: useCallback(({ outputs }) => {
+      pushLog(`Midi device connected! Available: ${outputs.map((o) => `'${o.name}'`).join(', ')}`);
+    }, []),
+    disconnected: useCallback(({ outputs }) => {
+      pushLog(`Midi device disconnected! Available: ${outputs.map((o) => `'${o.name}'`).join(', ')}`);
+    }, []),
+  }); */
+
+  const togglePlay = () => {
+    if (!cycle.started) {
+      activateCode();
+    } else {
+      cycle.stop();
+    }
+  };
+
+  return {
+    pending,
+    code,
+    setCode,
+    pattern,
+    error,
+    cycle,
+    setPattern,
+    dirty,
+    log,
+    togglePlay,
+    activateCode,
+    activeCode,
+    pushLog,
+    hash,
+  };
+}
+
+export default useRepl;