Revert "replace lastCharCode with nextCharCode"

This reverts commit d979a1c.

src/v2/interfaces/uses.ts

@@ -31,7 +31,7 @@ export interface UseRepository {
 	getUsesByIdsAndEdition(idArr: number[], edition: GalleryEdition): Promise<Uses>;
 	getRaw(): Promise<Record<string, Use>>;
 	getUseByIdOrName(idOrName: string): Promise<Uses | Use>;
-	nextCharCode(textureID: string): Promise<number>;
+	lastCharCode(textureID: string): Promise<number>;
 	deleteUse(id: string): Promise<WriteConfirmation[]>;
 	set(use: Use): Promise<Use>;
 	setMultiple(uses: Uses): Promise<Uses>;

src/v2/repository/use.repository.ts

@@ -40,7 +40,7 @@ export default class UseFirestormRepository implements UseRepository {
 		);
 	}
 
-	async nextCharCode(textureID: string): Promise<number> {
+	async lastCharCode(textureID: string): Promise<number> {
 		const foundUses = await uses.search([
 			{
 				field: "texture",
@@ -58,8 +58,8 @@ export default class UseFirestormRepository implements UseRepository {
 
 				if (curCode > best) return curCode;
 				return best;
-			}, // start at a and work upwards
-			"a".charCodeAt(0),
+			}, // subtract one since we're adding one later
+			"a".charCodeAt(0) - 1,
 		);
 	}
 

src/v2/service/use.service.ts

@@ -75,8 +75,8 @@ export default class UseService {
 	}
 
 	async appendUse(textureID: string, use: EntireUseToCreate): Promise<void> {
-		const nextCharCode = await this.repo.nextCharCode(textureID);
-		const nextLetter = String.fromCharCode(nextCharCode);
+		const lastCharCode = await this.repo.lastCharCode(textureID);
+		const nextLetter = String.fromCharCode(lastCharCode + 1);
 		const newUseID = `${textureID}${nextLetter}`;
 		const pathsWithUse: InputPath[] = use.paths.map((p) => ({ ...p, use: newUseID }));
 
@@ -92,11 +92,11 @@ export default class UseService {
 	}
 
 	async appendMultipleUses(textureID: string, uses: EntireUseToCreate[]): Promise<void> {
-		const nextCharCode = await this.repo.nextCharCode(textureID);
+		const lastCharCode = await this.repo.lastCharCode(textureID);
 		const pathsToCreate: InputPath[] = [];
 		const usesToCreate = uses.map((use, charOffset) => {
-			// get next letter for each use
-			const nextLetter = String.fromCharCode(nextCharCode + charOffset);
+			// add one to start after the previous letter
+			const nextLetter = String.fromCharCode(lastCharCode + 1 + charOffset);
 			const newUseID = `${textureID}${nextLetter}`;
 			// flat paths array to save requests
 			if (use.paths?.length) pathsToCreate.push(...use.paths.map((p) => ({ ...p, use: newUseID })));