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import { z } from "zod";
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// Route handlers historically treated malformed JSON bodies as empty objects
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// and then let field-specific validation choose the public error. These
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// preprocessors preserve that behavior while moving the structural parsing to
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// zod.
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function objectOrEmpty(value: unknown): unknown {
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  if (typeof value !== "object" || value === null || Array.isArray(value)) {
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    return {};
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  }
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  return value;
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}
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const TrimmedStringSchema = z.preprocess(
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  (value) => (typeof value === "string" ? value.trim() : ""),
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  z.string()
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);
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const StringOrEmptySchema = z.preprocess(
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  (value) => (typeof value === "string" ? value : ""),
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  z.string()
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);
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const LowercaseSlugInputSchema = z.preprocess(
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  (value) => (typeof value === "string" ? value.trim().toLowerCase() : ""),
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  z.string()
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);
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const RepositoryVisibilitySchema = z.enum(["public", "private"]);
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const NullableRepositoryVisibilitySchema = z.preprocess(
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  (value) => (value === "public" || value === "private" ? value : null),
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  RepositoryVisibilitySchema.nullable()
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);
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export const RepositoryCreateRequestSchema = z.preprocess(
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  objectOrEmpty,
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  z.object({
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    namespaceSlug: LowercaseSlugInputSchema,
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    slug: LowercaseSlugInputSchema,
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    visibility: NullableRepositoryVisibilitySchema,
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  })
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);
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export const RepositoryVisibilityRequestSchema = z.preprocess(
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  objectOrEmpty,
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  z.object({
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    visibility: NullableRepositoryVisibilitySchema,
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  })
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);
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const PatGrantLevelSchema = z.enum(["pull", "push"]);
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const NullablePatGrantLevelSchema = z.preprocess(
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  (value) => (value === "pull" || value === "push" ? value : null),
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  PatGrantLevelSchema.nullable()
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);
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const PatNamespaceCreateRequestSchema = z.object({
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  scope: z.literal("namespace"),
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  name: TrimmedStringSchema,
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  namespaceSlug: LowercaseSlugInputSchema,
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  level: NullablePatGrantLevelSchema,
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});
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const PatRepoCreateRequestSchema = z.object({
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  scope: z.literal("repo"),
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  name: TrimmedStringSchema,
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  namespaceSlug: LowercaseSlugInputSchema,
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  repoSlug: LowercaseSlugInputSchema,
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  level: NullablePatGrantLevelSchema,
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});
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export const PatCreateRequestSchema = z.preprocess(
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  objectOrEmpty,
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  z.discriminatedUnion("scope", [PatNamespaceCreateRequestSchema, PatRepoCreateRequestSchema])
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);
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export const AdminCompactionRequestSchema = z.preprocess(
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  objectOrEmpty,
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  z.object({
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    dryRun: z.preprocess(
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      (value) => (value === false ? false : undefined),
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      z.literal(false).optional()
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    ),
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  })
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);
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export const AdminRefsPayloadSchema = z.array(
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  z
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    .object({
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      name: z.string(),
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      oid: z.string(),
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    })
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    .passthrough()
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);
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export const AdminHeadPayloadSchema = z
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  .object({
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    target: z.string(),
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    oid: z.string().optional(),
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    unborn: z.boolean().optional(),
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  })
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  .passthrough();
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export const AdminPurgeRequestSchema = z.preprocess(
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  objectOrEmpty,
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  z.object({
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    confirm: StringOrEmptySchema,
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  })
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);