feat: add models package

packages/models/src/Domain/Syncable/Theme/Theme.ts

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+import { ComponentArea } from '@standardnotes/features'
+import { SNComponent } from '../Component/Component'
+import { ConflictStrategy } from '../../Abstract/Item/Types/ConflictStrategy'
+import { AppDataField } from '../../Abstract/Item/Types/AppDataField'
+import { HistoryEntryInterface } from '../../Runtime/History'
+import { DecryptedItemInterface, ItemInterface } from '../../Abstract/Item'
+import { ContentType } from '@standardnotes/common'
+import { useBoolean } from '@standardnotes/utils'
+
+export const isTheme = (x: ItemInterface): x is SNTheme => x.content_type === ContentType.Theme
+
+export class SNTheme extends SNComponent {
+  public override area: ComponentArea = ComponentArea.Themes
+
+  isLayerable(): boolean {
+    return useBoolean(this.package_info && this.package_info.layerable, false)
+  }
+
+  /** Do not duplicate under most circumstances. Always keep original */
+  override strategyWhenConflictingWithItem(
+    _item: DecryptedItemInterface,
+    _previousRevision?: HistoryEntryInterface,
+  ): ConflictStrategy {
+    return ConflictStrategy.KeepBase
+  }
+
+  getMobileRules() {
+    return (
+      this.getAppDomainValue(AppDataField.MobileRules) || {
+        constants: {},
+        rules: {},
+      }
+    )
+  }
+
+  /** Same as getMobileRules but without default value. */
+  hasMobileRules() {
+    return this.getAppDomainValue(AppDataField.MobileRules)
+  }
+
+  getNotAvailOnMobile() {
+    return this.getAppDomainValue(AppDataField.NotAvailableOnMobile)
+  }
+
+  isMobileActive() {
+    return this.getAppDomainValue(AppDataField.MobileActive)
+  }
+}

packages/models/src/Domain/Syncable/Theme/ThemeMutator.ts

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+import { AppDataField } from '../../Abstract/Item/Types/AppDataField'
+import { ComponentContent } from '../Component/ComponentContent'
+import { DecryptedItemMutator } from '../../Abstract/Item/Mutator/DecryptedItemMutator'
+
+export class ThemeMutator extends DecryptedItemMutator<ComponentContent> {
+  setMobileRules(rules: unknown) {
+    this.setAppDataItem(AppDataField.MobileRules, rules)
+  }
+
+  setNotAvailOnMobile(notAvailable: boolean) {
+    this.setAppDataItem(AppDataField.NotAvailableOnMobile, notAvailable)
+  }
+
+  set local_url(local_url: string) {
+    this.mutableContent.local_url = local_url
+  }
+
+  /**
+   * We must not use .active because if you set that to true, it will also
+   * activate that theme on desktop/web
+   */
+  setMobileActive(active: boolean) {
+    this.setAppDataItem(AppDataField.MobileActive, active)
+  }
+}

packages/models/src/Domain/Syncable/Theme/index.ts

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+export * from './Theme'
+export * from './ThemeMutator'