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jssm.ts
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jssm.ts
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// whargarbl lots of these return arrays could/should be sets
type StateType = string;
import { reduce as reduce_to_639 } from 'reduce-to-639-1';
import {
JssmGenericState, JssmGenericConfig,
JssmTransition, JssmTransitionList, // JssmTransitionRule,
JssmMachineInternalState,
JssmParseTree,
JssmStateDeclaration, JssmStateDeclarationRule,
JssmCompileSe, JssmCompileSeStart, JssmCompileRule,
JssmArrow, JssmArrowDirection, JssmArrowKind,
JssmLayout,
FslDirection, FslTheme,
HookDescription, HookHandler
} from './jssm_types';
import {
seq, weighted_rand_select, weighted_sample_select, histograph,
weighted_histo_key, array_box_if_string, hook_name, named_hook_name
} from './jssm_util';
import { parse } from './jssm-dot'; // TODO FIXME WHARGARBL this could be post-typed
import { version } from './version'; // replaced from package.js in build
function xthrow<mDT>(machine: Machine<mDT>, message): never {
throw new Error(`${(machine.instance_name !== undefined)? `[[${machine.instance_name}]]: ` : ''}${message}${machine.state !== undefined? ` (at ${machine.state})` : ''}`);
}
/* eslint-disable complexity */
function arrow_direction(arrow: JssmArrow): JssmArrowDirection {
switch (String(arrow)) {
case '->': case '→':
case '=>': case '⇒':
case '~>': case '↛':
return 'right';
case '<-': case '←':
case '<=': case '⇐':
case '<~': case '↚':
return 'left';
case '<->': case '↔':
case '<-=>': case '←⇒': case '←=>': case '<-⇒':
case '<-~>': case '←↛': case '←~>': case '<-↛':
case '<=>': case '⇔':
case '<=->': case '⇐→': case '⇐->': case '<=→':
case '<=~>': case '⇐↛': case '⇐~>': case '<=↛':
case '<~>': case '↮':
case '<~->': case '↚→': case '↚->': case '<~→':
case '<~=>': case '↚⇒': case '↚=>': case '<~⇒':
return 'both';
default:
xthrow(this, `arrow_direction: unknown arrow type ${arrow}`);
}
}
/* eslint-enable complexity */
/* eslint-disable complexity */
function arrow_left_kind(arrow: JssmArrow): JssmArrowKind {
switch (String(arrow)) {
case '->': case '→':
case '=>': case '⇒':
case '~>': case '↛':
return 'none';
case '<-': case '←':
case '<->': case '↔':
case '<-=>': case '←⇒':
case '<-~>': case '←↛':
return 'legal';
case '<=': case '⇐':
case '<=>': case '⇔':
case '<=->': case '⇐→':
case '<=~>': case '⇐↛':
return 'main';
case '<~': case '↚':
case '<~>': case '↮':
case '<~->': case '↚→':
case '<~=>': case '↚⇒':
return 'forced';
default:
xthrow(this, `arrow_direction: unknown arrow type ${arrow}`);
}
}
/* eslint-enable complexity */
/* eslint-disable complexity */
function arrow_right_kind(arrow: JssmArrow): JssmArrowKind {
switch (String(arrow)) {
case '<-': case '←':
case '<=': case '⇐':
case '<~': case '↚':
return 'none';
case '->': case '→':
case '<->': case '↔':
case '<=->': case '⇐→':
case '<~->': case '↚→':
return 'legal';
case '=>': case '⇒':
case '<=>': case '⇔':
case '<-=>': case '←⇒':
case '<~=>': case '↚⇒':
return 'main';
case '~>': case '↛':
case '<~>': case '↮':
case '<-~>': case '←↛':
case '<=~>': case '⇐↛':
return 'forced';
default:
xthrow(this, `arrow_direction: unknown arrow type ${arrow}`);
}
}
/* eslint-enable complexity */
function makeTransition<mDT>(
this_se : JssmCompileSe,
from : string,
to : string,
isRight : boolean,
_wasList? : Array<string>,
_wasIndex? : number
): JssmTransition<mDT> {
const kind: JssmArrowKind = isRight ? arrow_right_kind(this_se.kind) : arrow_left_kind(this_se.kind),
edge: JssmTransition<mDT> = {
from,
to,
kind,
forced_only: kind === 'forced',
main_path: kind === 'main'
};
// if ((wasList !== undefined) && (wasIndex === undefined)) { xthrow(this, `Must have an index if transition was in a list"); }
// if ((wasIndex !== undefined) && (wasList === undefined)) { xthrow(this, `Must be in a list if transition has an index"); }
/*
if (typeof edge.to === 'object') {
if (edge.to.key === 'cycle') {
if (wasList === undefined) { xthrow(this, "Must have a waslist if a to is type cycle"); }
const nextIndex = wrapBy(wasIndex, edge.to.value, wasList.length);
edge.to = wasList[nextIndex];
}
}
*/
const action: string = isRight ? 'r_action' : 'l_action',
probability: string = isRight ? 'r_probability' : 'l_probability';
if (this_se[action]) { edge.action = this_se[action]; }
if (this_se[probability]) { edge.probability = this_se[probability]; }
return edge;
}
function wrap_parse(input: string, options?: Object) {
return parse(input, options || {});
}
function compile_rule_transition_step<mDT>(
acc : Array<JssmTransition<mDT>>,
from : string,
to : string,
this_se : JssmCompileSe,
next_se : JssmCompileSe
): Array<JssmTransition<mDT>> { // todo typescript describe the parser representation of a transition step extension
const edges: Array<JssmTransition<mDT>> = [];
const uFrom: Array<string> = (Array.isArray(from) ? from : [from]),
uTo: Array<string> = (Array.isArray(to) ? to : [to]);
uFrom.map((f: string) => {
uTo.map((t: string) => {
const right: JssmTransition<mDT> = makeTransition(this_se, f, t, true);
if (right.kind !== 'none') { edges.push(right); }
const left: JssmTransition<mDT> = makeTransition(this_se, t, f, false);
if (left.kind !== 'none') { edges.push(left); }
});
});
const new_acc: Array<JssmTransition<mDT>> = acc.concat(edges);
if (next_se) {
return compile_rule_transition_step(new_acc, to, next_se.to, next_se, next_se.se);
} else {
return new_acc;
}
}
function compile_rule_handle_transition(rule: JssmCompileSeStart<StateType>): any { // TODO FIXME no any // todo typescript describe the parser representation of a transition
return compile_rule_transition_step([], rule.from, rule.se.to, rule.se, rule.se.se);
}
function compile_rule_handler(rule: JssmCompileSeStart<StateType>): JssmCompileRule {
if (rule.key === 'transition') {
return { agg_as: 'transition', val: compile_rule_handle_transition(rule) };
}
if (rule.key === 'machine_language') {
return { agg_as: 'machine_language', val: reduce_to_639(rule.value) };
}
if (rule.key === 'state_declaration') {
if (!rule.name) { xthrow(this, 'State declarations must have a name'); }
return { agg_as: 'state_declaration', val: { state: rule.name, declarations: rule.value } };
}
if (['arrange_declaration', 'arrange_start_declaration',
'arrange_end_declaration'].includes(rule.key)) {
return { agg_as: rule.key, val: [rule.value] };
}
const tautologies: Array<string> = [
'graph_layout', 'start_states', 'end_states', 'machine_name', 'machine_version',
'machine_comment', 'machine_author', 'machine_contributor', 'machine_definition',
'machine_reference', 'machine_license', 'fsl_version', 'state_config', 'theme',
'flow', 'dot_preamble'
];
if (tautologies.includes(rule.key)) {
return { agg_as: rule.key, val: rule.value };
}
xthrow(this, `compile_rule_handler: Unknown rule: ${JSON.stringify(rule)}`);
}
function compile<mDT>(tree: JssmParseTree): JssmGenericConfig<mDT> {
const results: {
graph_layout : Array<JssmLayout>,
transition : Array<JssmTransition<mDT>>,
start_states : Array<string>,
end_states : Array<string>,
state_config : Array<any>, // TODO COMEBACK no any
state_declaration : Array<string>,
fsl_version : Array<string>,
machine_author : Array<string>,
machine_comment : Array<string>,
machine_contributor : Array<string>,
machine_definition : Array<string>,
machine_language : Array<string>,
machine_license : Array<string>,
machine_name : Array<string>,
machine_reference : Array<string>,
theme : Array<string>,
flow : Array<string>,
dot_preamble : Array<string>,
arrange_declaration : Array<Array<string>>, // TODO COMEBACK CHECKME
arrange_start_declaration : Array<Array<string>>, // TODO COMEBACK CHECKME
arrange_end_declaration : Array<Array<string>>, // TODO COMEBACK CHECKME
machine_version : Array<string> // TODO COMEBACK semver
} = {
graph_layout : [],
transition : [],
start_states : [],
end_states : [],
state_config : [],
state_declaration : [],
fsl_version : [],
machine_author : [],
machine_comment : [],
machine_contributor : [],
machine_definition : [],
machine_language : [],
machine_license : [],
machine_name : [],
machine_reference : [],
theme : [],
flow : [],
dot_preamble : [],
arrange_declaration : [],
arrange_start_declaration : [],
arrange_end_declaration : [],
machine_version : []
};
tree.map((tr: JssmCompileSeStart<StateType>) => {
const rule : JssmCompileRule = compile_rule_handler(tr),
agg_as : string = rule.agg_as,
val : any = rule.val; // TODO FIXME no any
results[agg_as] = results[agg_as].concat(val);
});
const assembled_transitions: Array<JssmTransition<mDT>> = [].concat(...results['transition']);
const result_cfg: JssmGenericConfig<mDT> = {
start_states: results.start_states.length ? results.start_states : [assembled_transitions[0].from],
transitions: assembled_transitions
};
const oneOnlyKeys: Array<string> = [
'graph_layout', 'machine_name', 'machine_version', 'machine_comment',
'fsl_version', 'machine_license', 'machine_definition', 'machine_language',
'theme', 'flow', 'dot_preamble'
];
oneOnlyKeys.map((oneOnlyKey: string) => {
if (results[oneOnlyKey].length > 1) {
xthrow(this,
`May only have one ${oneOnlyKey} statement maximum: ${JSON.stringify(results[oneOnlyKey])}`
);
} else {
if (results[oneOnlyKey].length) {
result_cfg[oneOnlyKey] = results[oneOnlyKey][0];
}
}
});
['arrange_declaration', 'arrange_start_declaration', 'arrange_end_declaration',
'machine_author', 'machine_contributor', 'machine_reference', 'state_declaration'].map(
(multiKey: string) => {
if (results[multiKey].length) {
result_cfg[multiKey] = results[multiKey];
}
}
);
return result_cfg;
}
function make<mDT>(plan: string): JssmGenericConfig<mDT> {
return compile(wrap_parse(plan));
}
function transfer_state_properties(state_decl: JssmStateDeclaration): JssmStateDeclaration {
state_decl.declarations.map((d: JssmStateDeclarationRule) => {
switch (d.key) {
case 'shape' : state_decl.shape = d.value; break;
case 'color' : state_decl.color = d.value; break;
case 'corners' : state_decl.corners = d.value; break;
case 'linestyle' : state_decl.linestyle = d.value; break;
case 'text-color' : state_decl.textColor = d.value; break;
case 'background-color' : state_decl.backgroundColor = d.value; break;
case 'border-color' : state_decl.borderColor = d.value; break;
default: xthrow(this, `Unknown state property: '${JSON.stringify(d)}'`);
}
});
return state_decl;
}
class Machine<mDT> {
_state: StateType;
_states: Map<StateType, JssmGenericState>;
_edges: Array<JssmTransition<mDT>>;
_edge_map: Map<StateType, Map<StateType, number>>;
_named_transitions: Map<StateType, number>;
_actions: Map<StateType, Map<StateType, number>>;
_reverse_actions: Map<StateType, Map<StateType, number>>;
_reverse_action_targets: Map<StateType, Map<StateType, number>>;
_machine_author?: Array<string>;
_machine_comment?: string;
_machine_contributor?: Array<string>;
_machine_definition?: string;
_machine_language?: string;
_machine_license?: string;
_machine_name?: string;
_machine_version?: string;
_fsl_version?: string;
_raw_state_declaration?: Array<Object>;
_state_declarations: Map<StateType, JssmStateDeclaration>;
_instance_name : string;
_graph_layout : JssmLayout;
_dot_preamble : string;
_arrange_declaration : Array<Array<StateType>>;
_arrange_start_declaration : Array<Array<StateType>>;
_arrange_end_declaration : Array<Array<StateType>>;
_theme : FslTheme;
_flow : FslDirection;
_has_hooks : boolean;
_has_basic_hooks : boolean;
_has_named_hooks : boolean;
_has_entry_hooks : boolean;
_has_exit_hooks : boolean;
_has_global_action_hooks : boolean;
_has_transition_hooks : boolean;
// no boolean for _has_any_transition_hook
_hooks : Map<string, Function>;
_named_hooks : Map<string, Function>;
_entry_hooks : Map<string, Function>;
_exit_hooks : Map<string, Function>;
_global_action_hooks : Map<string, Function>;
_any_action_hook : HookHandler | undefined;
_standard_transition_hook : HookHandler | undefined;
_main_transition_hook : HookHandler | undefined;
_forced_transition_hook : HookHandler | undefined;
_any_transition_hook : HookHandler | undefined;
// whargarbl this badly needs to be broken up, monolith master
constructor({
start_states,
complete = [],
transitions,
machine_author,
machine_comment,
machine_contributor,
machine_definition,
machine_language,
machine_license,
machine_name,
machine_version,
state_declaration,
fsl_version,
dot_preamble = undefined,
arrange_declaration = [],
arrange_start_declaration = [],
arrange_end_declaration = [],
theme = 'default',
flow = 'down',
graph_layout = 'dot',
instance_name
}: JssmGenericConfig<mDT>) {
this._instance_name = instance_name;
this._state = start_states[0];
this._states = new Map();
this._state_declarations = new Map();
this._edges = [];
this._edge_map = new Map();
this._named_transitions = new Map();
this._actions = new Map();
this._reverse_actions = new Map();
this._reverse_action_targets = new Map(); // todo
this._machine_author = array_box_if_string(machine_author);
this._machine_comment = machine_comment;
this._machine_contributor = array_box_if_string(machine_contributor);
this._machine_definition = machine_definition;
this._machine_language = machine_language;
this._machine_license = machine_license;
this._machine_name = machine_name;
this._machine_version = machine_version;
this._raw_state_declaration = state_declaration || [];
this._fsl_version = fsl_version;
this._arrange_declaration = arrange_declaration;
this._arrange_start_declaration = arrange_start_declaration;
this._arrange_end_declaration = arrange_end_declaration;
this._dot_preamble = dot_preamble;
this._theme = theme;
this._flow = flow;
this._graph_layout = graph_layout;
this._has_hooks = false;
this._has_basic_hooks = false;
this._has_named_hooks = false;
this._has_entry_hooks = false;
this._has_exit_hooks = false;
this._has_global_action_hooks = false;
this._has_transition_hooks = true;
// no need for a boolean has any transition hook, as it's one or nothing, so just test that for undefinedness
this._hooks = new Map();
this._named_hooks = new Map();
this._entry_hooks = new Map();
this._exit_hooks = new Map();
this._global_action_hooks = new Map();
this._any_action_hook = undefined;
this._standard_transition_hook = undefined;
this._main_transition_hook = undefined;
this._forced_transition_hook = undefined;
this._any_transition_hook = undefined;
this._standard_transition_hook = undefined;
if (state_declaration) {
state_declaration.map((state_decl: JssmStateDeclaration) => {
if (this._state_declarations.has(state_decl.state)) { // no repeats
xthrow(this, `Added the same state declaration twice: ${JSON.stringify(state_decl.state)}`);
}
this._state_declarations.set(state_decl.state, transfer_state_properties(state_decl));
});
}
transitions.map((tr: JssmTransition<mDT>) => {
if (tr.from === undefined) { xthrow(this, `transition must define 'from': ${JSON.stringify(tr)}`); }
if (tr.to === undefined) { xthrow(this, `transition must define 'to': ${JSON.stringify(tr)}`); }
// get the cursors. what a mess
const cursor_from: JssmGenericState
= this._states.get(tr.from)
|| { name: tr.from, from: [], to: [], complete: complete.includes(tr.from) };
if (!(this._states.has(tr.from))) {
this._new_state(cursor_from);
}
const cursor_to: JssmGenericState
= this._states.get(tr.to)
|| { name: tr.to, from: [], to: [], complete: complete.includes(tr.to) };
if (!(this._states.has(tr.to))) {
this._new_state(cursor_to);
}
// guard against existing connections being re-added
if (cursor_from.to.includes(tr.to)) {
xthrow(this, `already has ${JSON.stringify(tr.from)} to ${JSON.stringify(tr.to)}`);
} else {
cursor_from.to.push(tr.to);
cursor_to.from.push(tr.from);
}
// add the edge; note its id
this._edges.push(tr);
const thisEdgeId: number = this._edges.length - 1;
// guard against repeating a transition name
if (tr.name) {
if (this._named_transitions.has(tr.name)) {
xthrow(this, `named transition "${JSON.stringify(tr.name)}" already created`);
} else {
this._named_transitions.set(tr.name, thisEdgeId);
}
}
// set up the mapping, so that edges can be looked up by endpoint pairs
const from_mapping: Map<StateType, number> = this._edge_map.get(tr.from) || new Map();
if (!(this._edge_map.has(tr.from))) {
this._edge_map.set(tr.from, from_mapping);
}
// const to_mapping = from_mapping.get(tr.to);
from_mapping.set(tr.to, thisEdgeId); // already checked that this mapping doesn't exist, above
// set up the action mapping, so that actions can be looked up by origin
if (tr.action) {
// forward mapping first by action name
let actionMap: Map<StateType, number> = this._actions.get(tr.action);
if (!(actionMap)) {
actionMap = new Map();
this._actions.set(tr.action, actionMap);
}
if (actionMap.has(tr.from)) {
xthrow(this, `action ${JSON.stringify(tr.action)} already attached to origin ${JSON.stringify(tr.from)}`);
} else {
actionMap.set(tr.from, thisEdgeId);
}
// reverse mapping first by state origin name
let rActionMap: Map<StateType, number> = this._reverse_actions.get(tr.from);
if (!(rActionMap)) {
rActionMap = new Map();
this._reverse_actions.set(tr.from, rActionMap);
}
// no need to test for reverse mapping pre-presence;
// forward mapping already covers collisions
rActionMap.set(tr.action, thisEdgeId);
// reverse mapping first by state target name
if (!(this._reverse_action_targets.has(tr.to))) {
this._reverse_action_targets.set(tr.to, new Map());
}
/* todo comeback
fundamental problem is roActionMap needs to be a multimap
const roActionMap = this._reverse_action_targets.get(tr.to); // wasteful - already did has - refactor
if (roActionMap) {
if (roActionMap.has(tr.action)) {
xthrow(this, `ro-action ${tr.to} already attached to action ${tr.action}`);
} else {
roActionMap.set(tr.action, thisEdgeId);
}
} else {
xthrow(this, `should be impossible - flow doesn\'t know .set precedes .get yet again. severe error?');
}
*/
}
});
}
_new_state(state_config: JssmGenericState): StateType {
if (this._states.has(state_config.name)) {
xthrow(this, `state ${JSON.stringify(state_config.name)} already exists`);
}
this._states.set(state_config.name, state_config);
return state_config.name;
}
state(): StateType {
return this._state;
}
/* whargarbl todo major
when we reimplement this, reintroduce this change to the is_final call
is_changing(): boolean {
return true; // todo whargarbl
}
*/
state_is_final(whichState: StateType): boolean {
return ((this.state_is_terminal(whichState)) && (this.state_is_complete(whichState)));
}
is_final(): boolean {
// return ((!this.is_changing()) && this.state_is_final(this.state()));
return this.state_is_final(this.state());
}
graph_layout(): string {
return this._graph_layout;
}
dot_preamble(): string {
return this._dot_preamble;
}
machine_author(): Array<string> {
return this._machine_author;
}
machine_comment(): string {
return this._machine_comment;
}
machine_contributor(): Array<string> {
return this._machine_contributor;
}
machine_definition(): string {
return this._machine_definition;
}
machine_language(): string {
return this._machine_language;
}
machine_license(): string {
return this._machine_license;
}
machine_name(): string {
return this._machine_name;
}
machine_version(): string {
return this._machine_version;
}
raw_state_declarations(): Array<Object> {
return this._raw_state_declaration;
}
state_declaration(which: StateType): JssmStateDeclaration {
return this._state_declarations.get(which);
}
state_declarations(): Map<StateType, JssmStateDeclaration> {
return this._state_declarations;
}
fsl_version(): string {
return this._fsl_version;
}
machine_state(): JssmMachineInternalState<mDT> {
return {
internal_state_impl_version: 1,
actions: this._actions,
edge_map: this._edge_map,
edges: this._edges,
named_transitions: this._named_transitions,
reverse_actions: this._reverse_actions,
// reverse_action_targets : this._reverse_action_targets,
state: this._state,
states: this._states
};
}
/*
load_machine_state(): boolean {
return false; // todo whargarbl
}
*/
states(): Array<StateType> {
return Array.from(this._states.keys());
}
state_for(whichState: StateType): JssmGenericState {
const state: JssmGenericState = this._states.get(whichState);
if (state) { return state; }
else { xthrow(this, `no such state ${JSON.stringify(state)}`); }
}
has_state(whichState: StateType): boolean {
return this._states.get(whichState) !== undefined;
}
list_edges(): Array<JssmTransition<mDT>> {
return this._edges;
}
list_named_transitions(): Map<StateType, number> {
return this._named_transitions;
}
list_actions(): Array<StateType> {
return Array.from(this._actions.keys());
}
theme(): FslTheme {
return this._theme; // constructor sets this to "default" otherwise
}
flow(): FslDirection {
return this._flow;
}
get_transition_by_state_names(from: StateType, to: StateType): number {
const emg: Map<StateType, number> = this._edge_map.get(from);
if (emg) {
return emg.get(to);
} else {
return undefined;
}
}
lookup_transition_for(from: StateType, to: StateType): JssmTransition<mDT> {
const id: number = this.get_transition_by_state_names(from, to);
return ((id === undefined) || (id === null)) ? undefined : this._edges[id];
}
list_transitions(whichState: StateType = this.state()): JssmTransitionList {
return { entrances: this.list_entrances(whichState), exits: this.list_exits(whichState) };
}
list_entrances(whichState: StateType = this.state()): Array<StateType> {
return (this._states.get(whichState)
|| { from: undefined }).from
|| [];
}
list_exits(whichState: StateType = this.state()): Array<StateType> {
return (this._states.get(whichState)
|| { to: undefined }).to
|| [];
}
probable_exits_for(whichState: StateType): Array<JssmTransition<mDT>> {
const wstate: JssmGenericState = this._states.get(whichState);
if (!(wstate)) { xthrow(this, `No such state ${JSON.stringify(whichState)} in probable_exits_for`); }
const wstate_to: Array<StateType> = wstate.to,
wtf: Array<JssmTransition<mDT>> // wstate_to_filtered -> wtf
= wstate_to
.map((ws): JssmTransition<mDT> => this.lookup_transition_for(this.state(), ws))
.filter(Boolean);
return wtf;
}
probabilistic_transition(): boolean {
const selected: JssmTransition<mDT> = weighted_rand_select(this.probable_exits_for(this.state()));
return this.transition(selected.to);
}
probabilistic_walk(n: number): Array<StateType> {
return seq(n)
.map((): StateType => {
const state_was: StateType = this.state();
this.probabilistic_transition();
return state_was;
})
.concat([this.state()]);
}
probabilistic_histo_walk(n: number): Map<StateType, number> {
return histograph(this.probabilistic_walk(n));
}
actions(whichState: StateType = this.state()): Array<StateType> {
const wstate: Map<StateType, number> = this._reverse_actions.get(whichState);
if (wstate) { return Array.from(wstate.keys()); }
else { xthrow(this, `No such state ${JSON.stringify(whichState)}`); }
}
list_states_having_action(whichState: StateType): Array<StateType> {
const wstate: Map<StateType, number> = this._actions.get(whichState);
if (wstate) { return Array.from(wstate.keys()); }
else { xthrow(this, `No such state ${JSON.stringify(whichState)}`); }
}
// comeback
/*
list_entrance_actions(whichState: mNT = this.state() ) : Array<mNT> {
return [... (this._reverse_action_targets.get(whichState) || new Map()).values()] // wasteful
.map( (edgeId:any) => (this._edges[edgeId] : any)) // whargarbl burn out any
.filter( (o:any) => o.to === whichState)
.map( filtered => filtered.from );
}
*/
list_exit_actions(whichState: StateType = this.state()): Array<StateType> { // these are mNT, not ?mNT
const ra_base: Map<StateType, number> = this._reverse_actions.get(whichState);
if (!(ra_base)) { xthrow(this, `No such state ${JSON.stringify(whichState)}`); }
return Array.from(ra_base.values())
.map((edgeId: number): JssmTransition<mDT> => this._edges[edgeId])
.filter((o: JssmTransition<mDT>): boolean => o.from === whichState)
.map((filtered: JssmTransition<mDT>): StateType => filtered.action);
}
probable_action_exits(whichState: StateType = this.state()): Array<any> { // these are mNT // TODO FIXME no any
const ra_base: Map<StateType, number> = this._reverse_actions.get(whichState);
if (!(ra_base)) { xthrow(this, `No such state ${JSON.stringify(whichState)}`); }
return Array.from(ra_base.values())
.map((edgeId: number): JssmTransition<mDT> => this._edges[edgeId])
.filter((o: JssmTransition<mDT>): boolean => o.from === whichState)
.map((filtered): any => ({
action: filtered.action, // TODO FIXME no any
probability: filtered.probability
})
);
}
// TODO FIXME test that is_unenterable on non-state throws
is_unenterable(whichState: StateType): boolean {
if (!(this.has_state(whichState))) { xthrow(this, `No such state ${whichState}`); }
return this.list_entrances(whichState).length === 0;