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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 | const DRAFT_STORAGE_PREFIX = "solution-edit-draft"; const DRAFT_SAVE_DELAY = 500; const DRAFT_MAX_AGE = 7 * 24 * 60 * 60 * 1000; const EXTRA_ARRAY_FIELD_NAMES = [ "useful_links_url[]", "use_cases_description[]", "charms[]", "categories", ]; type DraftValues = Record<string, string[]>; interface LocalDraft { savedAt: string; values: DraftValues; } interface MultivalueFieldConfig { addButton: HTMLElement | null; container: HTMLElement; itemSelector: string; name: string; removeSelector: string; } type EditableFormField = HTMLInputElement | HTMLSelectElement | HTMLTextAreaElement; function getMultivalueFieldConfigs(): MultivalueFieldConfig[] { return Array.from( document.querySelectorAll<HTMLElement>("[data-autosave-multivalue-field]") ).map((container) => ({ addButton: document.getElementById( container.dataset.autosaveAddButton as string ), container, itemSelector: container.dataset.autosaveItemSelector as string, name: container.dataset.autosaveMultivalueField as string, removeSelector: container.dataset.autosaveRemoveSelector as string, })); } function getArrayFieldNames(): string[] { return [ ...getMultivalueFieldConfigs().map(({ name }) => name), ...EXTRA_ARRAY_FIELD_NAMES, ]; } function getDraftStorageKey(form: HTMLFormElement): string { return `${DRAFT_STORAGE_PREFIX}:${window.location.pathname}:${form.getAttribute( "action" )}`; } function getFormValues(form: HTMLFormElement): DraftValues { const values: DraftValues = {}; for (const [name, value] of new FormData(form).entries()) { if (["csrf_token", "action", "charm-search"].includes(name)) { continue; } if (!values[name]) { values[name] = []; } values[name].push(value as string); } // keep empty multivalue fields in the draft so removed items stay removed getArrayFieldNames().forEach((name) => { if (!values[name]) { values[name] = []; } }); return values; } const serializeForm = (form: HTMLFormElement): string => JSON.stringify(getFormValues(form)); function setAutosaveStatus(message: string): void { const status = document.getElementById("local-autosave-status"); if (status) { status.textContent = message; } } function getFormattedTime(date = new Date()): string { return date.toLocaleTimeString([], { hour: "2-digit", hour12: false, minute: "2-digit", }); } function saveLocalDraft(form: HTMLFormElement): void { try { window.localStorage.setItem( getDraftStorageKey(form), JSON.stringify({ savedAt: new Date().toISOString(), values: getFormValues(form), }) ); setAutosaveStatus( `Local autosave saved at ${getFormattedTime()}. Edits are saved in this browser only.` ); } catch (error) { console.warn("Failed to save solution draft", error); setAutosaveStatus("Local autosave could not save your edits."); } } function removeLocalDraft(form: HTMLFormElement): void { try { window.localStorage.removeItem(getDraftStorageKey(form)); } catch (error) { console.warn("Failed to remove solution draft", error); } } function getLocalDraft(form: HTMLFormElement): LocalDraft | null { try { const draftJson = window.localStorage.getItem(getDraftStorageKey(form)); const draft = draftJson ? (JSON.parse(draftJson) as LocalDraft) : null; const savedAt = Date.parse(draft?.savedAt as string); if ( draft && (Number.isNaN(savedAt) || Date.now() - savedAt > DRAFT_MAX_AGE) ) { removeLocalDraft(form); return null; } return draft; } catch (error) { console.warn("Failed to read solution draft", error); return null; } } function restoreMultivalueFields(draftValues: DraftValues): void { getMultivalueFieldConfigs().forEach( ({ addButton, container, itemSelector, name, removeSelector }) => { const values = draftValues[name]; if (!values || !addButton || !itemSelector || !removeSelector) { return; } while (container.querySelectorAll(itemSelector).length < values.length) { const count = container.querySelectorAll(itemSelector).length; addButton.click(); if (container.querySelectorAll(itemSelector).length === count) { break; } } while (container.querySelectorAll(itemSelector).length > values.length) { container .querySelector(itemSelector) ?.querySelector<HTMLElement>(removeSelector) ?.click(); } } ); } function restoreCharms(draftValues: DraftValues): void { const charms = draftValues["charms[]"]; const selectedCharms = document.getElementById("selected-charms"); const template = document.getElementById( "charm-item-template" ) as HTMLTemplateElement | null; if (!charms || !selectedCharms || !template) { return; } selectedCharms.innerHTML = ""; charms.forEach((charmName) => { const item = ( template.content.cloneNode(true) as DocumentFragment ).querySelector<HTMLElement>("[data-charm-name]"); if (!item) { return; } item.dataset.charmName = charmName; item.querySelector("span")!.textContent = charmName; item.querySelector<HTMLInputElement>('input[name="charms[]"]')!.value = charmName; item .querySelector("button") ?.setAttribute("aria-label", `Remove ${charmName}`); selectedCharms.appendChild(item); }); } function restoreLocalDraft(form: HTMLFormElement): void { const draft = getLocalDraft(form); if (!draft?.values) { return; } restoreMultivalueFields(draft.values); restoreCharms(draft.values); Object.entries(draft.values).forEach(([name, values]) => { const fields = Array.from(form.elements) .filter( (field): field is EditableFormField => field instanceof HTMLInputElement || field instanceof HTMLSelectElement || field instanceof HTMLTextAreaElement ) .filter((field) => field.name === name); fields.forEach((field, index) => { if (field.type === "checkbox" || field.type === "radio") { (field as HTMLInputElement).checked = values.includes(field.value); return; } if (values[index] !== undefined) { field.value = values[index]; if (name === "maintainers_email[]") { field .closest(".maintainer-item") ?.querySelector(".remove-maintainer") ?.setAttribute("aria-label", `Remove ${values[index]}`); } } }); }); setAutosaveStatus( `Restored local autosave from ${getFormattedTime( new Date(draft.savedAt) )}. Edits are saved in this browser only.` ); } function initCancelLink(form: HTMLFormElement, discardDraft: () => void): void { const cancelLink = document.getElementById( "cancel-edit-solution" ) as HTMLAnchorElement | null; const modal = document.getElementById("local-autosave-cancel-modal"); const keepButton = document.getElementById("local-autosave-cancel-keep"); const discardButton = document.getElementById( "local-autosave-cancel-discard" ); const closeButton = modal?.querySelector(".p-modal__close"); if (!cancelLink) { return; } const leave = () => { discardDraft(); window.location.href = cancelLink.href; }; const closeModal = () => { modal?.classList.add("u-hide"); cancelLink.focus(); }; cancelLink.addEventListener("click", (event) => { event.preventDefault(); event.stopPropagation(); if (!getLocalDraft(form) || !modal) { leave(); return; } modal.classList.remove("u-hide"); keepButton?.focus(); }); discardButton?.addEventListener("click", leave); keepButton?.addEventListener("click", closeModal); closeButton?.addEventListener("click", closeModal); modal?.addEventListener("click", (event) => { if (event.target === modal) { closeModal(); } }); document.addEventListener("keydown", (event) => { if (event.key === "Escape" && !modal?.classList.contains("u-hide")) { closeModal(); } }); } function initLocalAutosave(form: HTMLFormElement): void { let saveTimeout: number; let skipBeforeUnloadSave = false; restoreLocalDraft(form); // compare against the restored state so untouched forms do not create drafts const initialValues = serializeForm(form); let isDirty = false; let lastAutosavedValues = initialValues; const saveChanges = () => { const currentValues = serializeForm(form); if (currentValues === lastAutosavedValues) { isDirty = false; return; } // remove the draft if the user returns the form to its starting values if (currentValues === initialValues) { removeLocalDraft(form); } else { saveLocalDraft(form); } isDirty = false; lastAutosavedValues = currentValues; }; const discardDraft = () => { skipBeforeUnloadSave = true; window.clearTimeout(saveTimeout); removeLocalDraft(form); }; const scheduleSave = () => { isDirty = true; window.clearTimeout(saveTimeout); if (!skipBeforeUnloadSave) { saveTimeout = window.setTimeout(saveChanges, DRAFT_SAVE_DELAY); } }; initCancelLink(form, discardDraft); // input and change fire immediately when a field is edited form.addEventListener("input", scheduleSave); form.addEventListener("change", scheduleSave); // use setTimeout to let clicks on add/remove buttons update multivalue fields before saving form.addEventListener("click", () => window.setTimeout(scheduleSave, 0)); form.addEventListener("submit", (event) => { if (!event.defaultPrevented) { discardDraft(); } }); window.addEventListener("beforeunload", () => { if (!skipBeforeUnloadSave && isDirty) { saveChanges(); } }); } export default initLocalAutosave; |