Hello world

First open source release of Campfire 🎉

app/javascript/lib/autocomplete/suggestion_context.js

@@ -0,0 +1,59 @@
+export default class SuggestionContext {
+  #content
+  #position
+
+  constructor(delegate, content, position) {
+    this.#content = content
+    this.#position = position
+
+    const { matchQueryAndTerminatorForWord, characterMatchesWordBoundary } = delegate
+    const bounds = this.#findWordBoundsFromStringAtPosition(characterMatchesWordBoundary)
+
+    if (bounds) {
+      [this.startPosition, this.endPosition] = Array.from(bounds)
+      this.word = this.#content.slice(...Array.from(bounds || []))
+
+      const match = matchQueryAndTerminatorForWord(this.word)
+      if (match) {
+        const {query, terminator} = match
+        if (query.length) { this.query = query }
+        if (terminator.length) { this.terminator = terminator }
+        this.active = true
+      }
+    }
+  }
+
+  isActive() {
+    return this.active
+  }
+
+  isTerminated() {
+    return this.terminator?.length && (this.#position === this.endPosition)
+  }
+
+  isEqualTo(context) {
+    return false
+  }
+
+  #findWordBoundsFromStringAtPosition(characterMatchesWordBoundary) {
+    let char, index
+    let start = (index = this.#position)
+
+    while (--index >= 0) {
+      char = this.#content.charAt(index)
+      if (characterMatchesWordBoundary(char)) { break }
+      start = index
+    }
+  
+    let end = (index = this.#position)
+    while (index < this.#content.length) {
+      char = this.#content.charAt(index)
+      if (characterMatchesWordBoundary(char)) { break }
+      end = ++index
+    }
+  
+    if (start !== end) {
+      return [ start, end ]
+    }
+  }
+}