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Utils

import NonFungibleToken from 0x1d7e57aa55817448 import ViewResolver from 0x1d7e57aa55817448 import MetadataViews from 0x1d7e57aa55817448 import StringUtils from 0xa340dc0a4ec828ab import AddressUtils from 0xa340dc0a4ec828ab import NFTCatalog from 0x49a7cda3a1eecc29 pub contract Utils { pub fun borrowViewResolver(_ t: Type): &ViewResolver? { let segments = StringUtils.split(t.identifier, ".") let addr = AddressUtils.parseAddress(segments[1]) ?? panic("borrowViewResolver: unable to parse address") let contractName = segments[2] return getAccount(addr).contracts.borrow<&ViewResolver>(name: contractName) } pub fun firstCatalogEntry(_ t: Type): NFTCatalog.NFTCatalogMetadata? { if let catalogEntries = NFTCatalog.getCollectionsForType(nftTypeIdentifier: t.identifier) { for k in catalogEntries.keys { if catalogEntries[k] == true { return NFTCatalog.getCatalogEntry(collectionIdentifier: k)! } } } return nil } pub fun resolveCollectionMetadata(_ t: Type): CollectionMetadata? { // if this type is in the nft catalog, we can just use its data. if let catalogEntry = self.firstCatalogEntry(t) { return CollectionMetadata(catalogEntry, nil, nil) } if let vr = self.borrowViewResolver(t) { let display = vr.resolveView(Type<MetadataViews.NFTCollectionDisplay>()) as! MetadataViews.NFTCollectionDisplay? let data = vr.resolveView(Type<MetadataViews.NFTCollectionData>()) as! MetadataViews.NFTCollectionData? return CollectionMetadata(nil, display, data) } return nil } pub fun resolveContractNftTypes(addr: Address, name: String): [String] { let types: [String] = [] let acct = getAccount(addr) let c = acct.contracts.get(name: name) ?? panic("contract not found") let pts = c.publicTypes() let nftType = Type<@NonFungibleToken.NFT>() for t in pts { if t.isSubtype(of: nftType) { types.append(t.identifier) } } return types } pub fun resolveNftMetadata(acct: AuthAccount, storagePath: StoragePath, id: UInt64): NftMetadata? { let c = acct.borrow<&{NonFungibleToken.CollectionPublic}>(from: storagePath) ?? panic("no collection found at storage path") let nft = c!.borrowNFT(id: id) return NftMetadata(nft) } pub struct NftMetadata { pub let id: UInt64 pub let uuid: UInt64 pub let type: String pub let owner: Address? pub var serial: UInt64 pub var displayName: String pub var displayThumbnail: String? pub var externalUrl: String? pub var traits: [MetadataViews.Trait] pub var editions: [MetadataViews.Edition] init(_ nft: &NonFungibleToken.NFT) { self.id = nft.id self.uuid = nft.uuid self.type = nft.getType().identifier self.owner = nft.owner?.address self.serial = self.id let segments = StringUtils.split(self.type, ".") self.displayName = segments[2].concat(" #").concat(self.serial.toString()) self.displayThumbnail = nil self.externalUrl = nil self.editions = [] self.traits = [] if let s = nft.resolveView(Type<MetadataViews.Serial>()) as! MetadataViews.Serial? { self.serial = s.number } if let e = nft.resolveView(Type<MetadataViews.ExternalURL>()) as! MetadataViews.ExternalURL? { self.externalUrl = e.url } if let display = nft.resolveView(Type<MetadataViews.Display>()) as! MetadataViews.Display? { self.displayName = display.name self.displayThumbnail = display.thumbnail.uri() } if let traits = nft.resolveView(Type<MetadataViews.Traits>()) as! MetadataViews.Traits? { self.traits = traits.traits } if let editions = nft.resolveView(Type<MetadataViews.Editions>()) as! MetadataViews.Editions? { self.editions = editions.infoList } } } pub struct CollectionMetadata { pub var inCatalog: Bool pub var display: CollectionDisplay? pub var data: CollectionData? init(_ catalogMetadata: NFTCatalog.NFTCatalogMetadata?, _ collectionDisplay: MetadataViews.NFTCollectionDisplay?, _ collectionData: MetadataViews.NFTCollectionData?) { self.display = nil self.data = nil self.inCatalog = false if let c = catalogMetadata { self.display = CollectionDisplay(c.collectionDisplay) self.data = CollectionData(c.collectionData, nil) self.inCatalog = true return } if let c = collectionDisplay { self.display = CollectionDisplay(c) } if let d = collectionData { self.data = CollectionData(nil, d) } } } pub struct CollectionDisplay { pub let name: String pub let description: String pub let externalURL: String pub let squareImage: Media pub let bannerImage: Media pub let socials: {String: String} init(_ c: MetadataViews.NFTCollectionDisplay) { self.name = c.name self.description = c.description self.externalURL = c.externalURL.url self.squareImage = Media(c.squareImage) self.bannerImage = Media(c.bannerImage) self.socials = {} for k in c.socials.keys { self.socials[k] = c.socials[k]!.url } } } pub struct Media { pub let uri: String pub let fileType: String pub let mediaType: String init(_ m: MetadataViews.Media) { self.uri = m.file.uri() self.fileType = m.file.getType().identifier self.mediaType = m.mediaType } } pub struct CollectionData { pub var storagePath: StoragePath pub var publicPath: PublicPath init(_ catalogData: NFTCatalog.NFTCollectionData?, _ collectionData: MetadataViews.NFTCollectionData?) { self.storagePath = /storage/empty self.publicPath = /public/empty if let c = catalogData { self.storagePath = c.storagePath self.publicPath = c.publicPath return } else if let c = collectionData { self.storagePath = c.storagePath self.publicPath = c.publicPath return } else { panic("either catalogData or collection data must be non-nil") } } } }