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12 | import * as pledge from './pledge.js'
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21 |
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22 | export const bindPledge = (p, request) => {
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23 |
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24 | request.onerror = event => p.cancel(event.target.error)
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25 |
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26 | request.onsuccess = event => p.resolve(event.target.result)
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27 | }
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28 |
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32 |
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33 |
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34 | export const openDB = (name, initDB) => {
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35 | |
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37 |
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38 | const p = pledge.create()
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39 | const request = indexedDB.open(name)
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40 | |
41 |
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42 |
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43 | request.onupgradeneeded = event => initDB(event.target.result)
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44 | |
45 |
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46 |
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47 | request.onerror = event => p.cancel(event.target.error)
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48 | |
49 |
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50 |
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51 | request.onsuccess = event => {
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52 | |
53 |
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54 |
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55 | const db = event.target.result
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56 | db.onversionchange = () => { db.close() }
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57 | p.resolve(db)
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58 | }
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59 | return p
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60 | }
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61 |
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62 |
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63 |
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64 |
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65 |
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66 | export const deleteDB = name => pledge.createWithDependencies((p, name) => bindPledge(p, indexedDB.deleteDatabase(name)), name)
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67 |
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69 |
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71 |
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72 | export const createStores = (db, definitions) => definitions.forEach(d =>
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73 |
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74 | db.createObjectStore.apply(db, d)
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75 | )
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81 |
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82 |
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83 | export const transact = (db, stores, access = 'readwrite') => pledge.createWithDependencies((p, db, stores) => {
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84 | const transaction = db.transaction(stores, access)
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85 | p.resolve(stores.map(store => getStore(transaction, store)))
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86 | }, db, stores)
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87 |
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88 |
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89 |
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90 |
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91 |
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92 |
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93 | export const count = (store, range) => pledge.createWithDependencies((p, store, range) => bindPledge(p, store.count(range)), store, range)
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94 |
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95 |
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96 |
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98 |
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99 |
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100 | export const get = (store, key) => pledge.createWithDependencies((p, store, key) => bindPledge(p, store.get(key)), store, key)
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101 |
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102 | /**
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103 | * @param {pledge.Pledge<IDBObjectStore>} store
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104 | * @param {String | number | ArrayBuffer | Date | IDBKeyRange | Array<any> } key
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105 | */
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106 | export const del = (store, key) => pledge.createWithDependencies((p, store, key) => bindPledge(p, store.delete(key)), store, key)
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107 |
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109 |
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111 |
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112 |
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113 | export const put = (store, item, key) => pledge.createWithDependencies((p, store, item, key) => bindPledge(p, store.put(item, key)), store, item, key)
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120 |
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121 | export const add = (store, item, key) => pledge.createWithDependencies((p, store, item, key) => bindPledge(p, store.add(item, key)), store, item, key)
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122 |
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124 |
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125 |
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126 |
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127 |
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128 | export const addAutoKey = (store, item) => pledge.createWithDependencies((p, store, item) => bindPledge(p, store.add(item)), store, item)
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129 |
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131 |
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132 |
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133 |
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134 |
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135 |
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136 | export const getAll = (store, range, limit) => pledge.createWithDependencies((p, store, range, limit) => bindPledge(p, store.getAll(range, limit)), store, range, limit)
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137 |
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142 |
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143 |
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144 | export const getAllKeys = (store, range, limit) => pledge.createWithDependencies((p, store, range, limit) => bindPledge(p, store.getAllKeys(range, limit)), store, range, limit)
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145 |
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146 |
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147 |
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148 |
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149 |
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150 |
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151 |
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152 | export const queryFirst = (store, query, direction) => {
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153 | |
154 |
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155 |
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156 | let first = null
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157 | return iterateKeys(store, query, key => {
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158 | first = key
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159 | return false
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160 | }, direction).map(() => first)
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161 | }
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162 |
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163 |
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164 |
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165 |
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166 |
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167 |
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168 | export const getLastKey = (store, range = null) => queryFirst(store, range, 'prev')
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169 |
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170 |
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171 |
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172 |
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173 |
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174 |
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175 | export const getFirstKey = (store, range = null) => queryFirst(store, range, 'next')
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176 |
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186 |
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187 |
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188 |
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189 |
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190 | export const getAllKeysValues = (store, range, limit) => pledge.createWithDependencies((p, store, range, limit) => {
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191 | pledge.all([getAllKeys(store, range, limit), getAll(store, range, limit)]).map(([ks, vs]) => ks.map((k, i) => ({ k, v: vs[i] }))).whenResolved(p.resolve.bind(p))
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192 | }, store, range, limit)
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193 |
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194 |
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195 |
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196 |
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197 |
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198 |
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199 | const iterateOnRequest = (p, request, f) => {
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200 | request.onerror = p.cancel.bind(p)
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201 | |
202 |
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203 |
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204 | request.onsuccess = async event => {
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205 | const cursor = event.target.result
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206 | if (cursor === null || (await f(cursor)) === false) {
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207 | p.resolve(undefined)
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208 | return
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209 | }
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210 | cursor.continue()
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211 | }
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212 | }
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213 |
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219 |
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220 |
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221 | export const iterate = (store, keyrange, f, direction = 'next') => pledge.createWithDependencies((p, store, keyrange) => {
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222 | iterateOnRequest(p, store.openCursor(keyrange, direction), cursor => f(cursor.value, cursor.key))
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223 | }, store, keyrange)
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232 |
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233 | export const iterateKeys = (store, keyrange, f, direction = 'next') => pledge.createWithDependencies((p, store, keyrange) => {
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234 | iterateOnRequest(p, store.openKeyCursor(keyrange, direction), cursor => f(cursor.key))
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235 | }, store, keyrange)
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236 |
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237 |
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238 |
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239 |
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240 |
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241 |
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242 |
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243 | export const getStore = (t, store) => t.objectStore(store)
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244 |
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245 |
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246 |
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247 |
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248 |
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249 |
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250 |
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251 | export const createIDBKeyRangeBound = (lower, upper, lowerOpen, upperOpen) => IDBKeyRange.bound(lower, upper, lowerOpen, upperOpen)
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252 |
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253 |
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254 |
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255 |
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256 |
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257 | export const createIDBKeyRangeUpperBound = (upper, upperOpen) => IDBKeyRange.upperBound(upper, upperOpen)
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258 |
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259 |
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260 |
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261 |
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262 |
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263 | export const createIDBKeyRangeLowerBound = (lower, lowerOpen) => IDBKeyRange.lowerBound(lower, lowerOpen)
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264 |
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265 |
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