structure.drawio

<mxfile host="drawio-plugin" modified="2024-08-12T20:01:16.474Z" agent="5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36" etag="iuE1QgcduTQXNftw-tyR" version="20.5.3" type="embed"><diagram id="L9uo4u32R48G8U-ROONk" name="Page-1"><mxGraphModel dx="884" dy="546" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0"><root><mxCell id="0"/><mxCell id="1" parent="0"/><mxCell id="2" value="&lt;font style=&quot;font-size: 14px;&quot;&gt;title: str&lt;br&gt;author: str&lt;br&gt;cover: enum (Hard/Soft)&lt;br&gt;inventory: int&lt;br&gt;daily_fee: decimal&lt;br&gt;&lt;/font&gt;" style="rounded=0;whiteSpace=wrap;html=1;align=left;verticalAlign=top;spacingTop=3;spacingLeft=3;" parent="1" vertex="1"><mxGeometry x="125" y="490" width="170" height="100" as="geometry"/></mxCell><mxCell id="3" value="&lt;div style=&quot;background-color:#ffffff;color:#080808&quot;&gt;&lt;pre style=&quot;font-family:'JetBrains Mono',monospace;font-size:10,5pt;&quot;&gt;&lt;span style=&quot;color:#000000;&quot;&gt;&lt;font style=&quot;font-size: 16px;&quot;&gt;Book&lt;/font&gt;&lt;/span&gt;&lt;/pre&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1"><mxGeometry x="125" y="450" width="170" height="40" as="geometry"/></mxCell><mxCell id="18" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0.5;exitY=1;exitDx=0;exitDy=0;entryX=0.28;entryY=-0.071;entryDx=0;entryDy=0;entryPerimeter=0;endArrow=diamondThin;endFill=1;endSize=16;" edge="1" parent="1" source="4" target="12"><mxGeometry relative="1" as="geometry"/></mxCell><mxCell id="19" 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16px;&quot;&gt;Borrowing&lt;/font&gt;&lt;/span&gt;&lt;/pre&gt;&lt;/div&gt;" style="rounded=0;whiteSpace=wrap;html=1;" parent="1" vertex="1"><mxGeometry x="115" y="250" width="190" height="40" as="geometry"/></mxCell><mxCell id="20" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;exitX=0;exitY=0.5;exitDx=0;exitDy=0;entryX=0.998;entryY=0.606;entryDx=0;entryDy=0;entryPerimeter=0;endSize=16;endArrow=diamondThin;endFill=1;" edge="1" parent="1" source="8" target="4"><mxGeometry relative="1" as="geometry"/></mxCell><mxCell id="8" value="&lt;font style=&quot;font-size: 14px;&quot;&gt;status: enum (Pending/Paid)&lt;br&gt;payment_type: enum (Payment/Fine)&lt;br&gt;borrowing: Borrowing&lt;br&gt;session_url: url&lt;br&gt;session_id: str&lt;br&gt;money_to_pay: decimal&lt;br&gt;&lt;/font&gt;" style="rounded=0;whiteSpace=wrap;html=1;align=left;verticalAlign=top;spacingTop=3;spacingLeft=3;" parent="1" vertex="1"><mxGeometry x="360" y="290" width="240" height="120" 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