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annotate react_games/src/API_works/pagination_2.tsx @ 71:75de5903355c

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Giagantic changes that update Dowa library to be more align with stb style array and hashmap. Updated Seobeo to be caching on server side instead of file level caching. Deleted bunch of things I don't really use.
author June Park <parkjune1995@gmail.com>
date Sun, 28 Dec 2025 20:34:22 -0800
parents fb9bcd3145cb
children
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1 import { CSSProperties, useCallback, useEffect, useRef, useState } from "react";
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2
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3 interface PersonJson {
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4 name: string;
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5 height: string;
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6 mass: string;
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7 hair_color: string;
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8 skin_color: string;
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9 eye_color: string;
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10 birth_year: string;
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11 gender: string;
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12 homeworld: string;
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13 films: string[];
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14 species: string;
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15 vehicles: string[];
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16 starships: string[];
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17 created: string;
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18 edited: string;
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19 url: string;
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20 }
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21
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22 interface Person extends PersonJson {}
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23
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24 interface APIResponse {
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25 next: string | null;
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26 previous: string | null;
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27 results: PersonJson[];
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28 }
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29
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30 interface PageData extends APIResponse {
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31 curr: string;
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32 }
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33
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34 const BASE_URL = "https://swapi.py4e.com/api/people/";
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35
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36 const cacheMap: Map<string, Promise<PageData>> = new Map()
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37
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38 const getPeople = async (
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39 url: string,
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40 signal: AbortSignal,
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41 ): Promise<PageData> => {
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42 const cacheValue = cacheMap.get(url);
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43 if (cacheValue) return cacheValue;
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44
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45 const response = await fetch(url, { signal });
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46 if (!response.ok) throw new Error("Server Error");
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47 const pageData = await response.json();
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48
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49 cacheMap.set(url, pageData);
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50 return { ...pageData, curr: url };
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51 }
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52
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53 interface PersonRowProp {
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54 person: Person;
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55 }
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56
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57 interface StylesProp {
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58 row: CSSProperties,
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59 }
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60
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61 const styles: StylesProp = {
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62 row: {
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63 display: "flex",
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64 justifyContent: "space-between",
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65 borderBottom: "1px solid black",
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66 marginBottom: 10
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67 }
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68 }
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69
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70 const PersonRow = ({person}: PersonRowProp) => {
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71 return (
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72 <div style={styles.row}>
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73 <p>{ person.name }</p>
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74 <p>{ person.birth_year }</p>
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75 </div>
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76 )
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77 }
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78
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79 const constructSearchParam = (pageData: PageData) => {
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80 const sp = new URLSearchParams();
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81 if (pageData.next) {
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82 sp.set("next", pageData.next)
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83 }
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84 if (pageData.previous) {
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85 sp.set("previous", pageData.previous)
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86 }
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87 sp.set("curr", pageData.curr)
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88 return sp;
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89 }
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90
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91 const constructUrl = (url: string, sp: URLSearchParams) => {
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92 return `${url}?${sp.toString()}`
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93 }
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94
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95 type Direction = "next" | "previous"
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96
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97 type APIType = "page" | "offset" | "cursor" | "link"
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98
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99 const constructUrlFromSP = (apiType: APIType, sp: URLSearchParams): string | null => {
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100 switch(apiType) {
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101 case "page":
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102 case "offset":
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103 case "cursor":
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104 return `${BASE_URL}?${sp.toString()}`
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105 case "link":
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106 return sp.get("curr");
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107 }
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108 }
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109
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110 const updateSP = (
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111 apiType: APIType,
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112 direction: Direction,
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113 sp: URLSearchParams
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114 ) => {
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115 switch(apiType) {
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116 case "page":
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117 sp.set(
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118 "page",
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119 direction === "next" ?
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120 String(Number(sp.get("page") as string) + 1) :
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121 String(Math.max(Number(sp.get("page") as string) - 1, 1))
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122 );
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123 return sp;
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124 case "offset":
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125 sp.set("offset",
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126 direction === "next" ?
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127 String(Number(sp.get("offset") as string) + Number(sp.get("offset") as string)) :
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128 String(Number(sp.get("offset") as string) - Math.min(Number(sp.get("offset") as string)))
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129 );
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130 return sp;
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131 case "cursor":
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MrJuneJune <me@mrjunejune.com>
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132 // TODO get id from people:
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MrJuneJune <me@mrjunejune.com>
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133 return sp;
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MrJuneJune <me@mrjunejune.com>
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134 case "link":
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135 const curr = sp.get("curr") as string;
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136 const next = sp.get("next");
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MrJuneJune <me@mrjunejune.com>
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137 const previous = sp.get("previous");
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MrJuneJune <me@mrjunejune.com>
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138 if (direction === "next") {
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139 sp.delete("next");
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140 if (next) {
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141 sp.set("curr", next);
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MrJuneJune <me@mrjunejune.com>
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142 }
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143 sp.set("previous", curr);
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MrJuneJune <me@mrjunejune.com>
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144 } else {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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145 sp.delete("previous");
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MrJuneJune <me@mrjunejune.com>
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146 if (previous) {
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147 sp.set("curr", previous);
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MrJuneJune <me@mrjunejune.com>
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148 }
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149 sp.set("next", curr);
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MrJuneJune <me@mrjunejune.com>
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150 }
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MrJuneJune <me@mrjunejune.com>
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151 sp.set("offset", String(Number(sp.get("offset")) as number + 1));
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MrJuneJune <me@mrjunejune.com>
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152 return sp;
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MrJuneJune <me@mrjunejune.com>
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153 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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154 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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155
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MrJuneJune <me@mrjunejune.com>
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156 const usePageData = (api: APIType) => {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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157 const [apiType] = useState<APIType>(api);
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158 const [people, setPeople] = useState<Person[]>([]);
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159 const [hasNext, setHasNext] = useState(true);
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MrJuneJune <me@mrjunejune.com>
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160 const [hasPrevious, setHasPrevious] = useState(true);
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161 const abortRef = useRef<AbortController | null>(null);
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162
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163 /** Single path for: fetch -> set state -> reflect URL */
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164 const load = useCallback(async (url: string, replace = false) => {
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MrJuneJune <me@mrjunejune.com>
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165 // cancel any prior request
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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166 abortRef.current?.abort();
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167 const ac = new AbortController();
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168 abortRef.current = ac;
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169
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170 const page = await getPeople(url, ac.signal);
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parents:
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171
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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172 // state
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173 setPeople(page.results);
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parents:
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174
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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175 if (apiType === "link") {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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176 const sp = constructSearchParam(page);
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177 setHasNext(Boolean(page.next));
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178 setHasPrevious(Boolean(page.previous));
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179 const target = `${location.pathname}?${sp.toString()}`;
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180 replace ? history.replaceState(null, "", target) : history.pushState(null, "", target);
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181 } else {
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182 const sp = new URL(url).searchParams;
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183 const target = `${location.pathname}?${sp.toString()}`;
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184 replace ? history.replaceState(null, "", target) : history.pushState(null, "", target);
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parents:
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185 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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186 }, [apiType]);
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187
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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188 // Initial hydrate: reuse load()
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
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189 useEffect(() => {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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190 const sp = new URLSearchParams(location.search);
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191 const url = constructUrlFromSP(apiType, sp) ?? BASE_URL;
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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192 load(url, /* replace */ true);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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193 return () => abortRef.current?.abort();
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194 }, [apiType, load]);
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parents:
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195
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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196 // Button handler: reuse load()
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197 const handleOnClick = useCallback((direction: Direction) => {
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198 const sp = new URLSearchParams(location.search);
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199 const nextSP = updateSP(apiType, direction, sp);
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200 const nextUrl = constructUrlFromSP(apiType, nextSP);
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201 if (nextUrl) load(nextUrl);
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202 }, [apiType, load]);
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
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203
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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204 return { people, hasNext, hasPrevious, handleOnClick };
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
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205 };
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
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206
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
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207 const PageTableComponent = () => {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
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208 const {hasNext, hasPrevious, people, handleOnClick} = usePageData("link");
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
209 return (
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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210 <>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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211 <div style={{...styles.row, width: "30%", borderBottom: "none" }}>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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212 <button disabled={!hasNext} onClick={() => handleOnClick("next")}> Next </button>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
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213 <button disabled={!hasPrevious} onClick={() => handleOnClick("previous")}> Previous </button>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
214 </div>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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215 <div style={styles.row}>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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216 <p>Name</p>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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217 <p>Birth_year</p>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
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parents:
diff changeset
218 </div>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
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219 {people.map((person) => (<PersonRow person={person} />) )}
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
220 </>
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
221 )
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
222 }
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
223
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
224 export {
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
225 PageTableComponent,
fb9bcd3145cb [ReactGames] Few games I made using react just to practice few things.
MrJuneJune <me@mrjunejune.com>
parents:
diff changeset
226 }